Wyniki wyszukiwania dla: EXPERIMENTAL MODAL ANALYSIS

• Updating Finite Element Model of a Wind Turbine Blade Section Using Experimental Modal Analysis Results

  Publikacja

  • M. Łuczak
  • S. Manzato
  • B. Peeters
  • K. Branner
  • P. Berring
  • M. Kahsin

  - SHOCK AND VIBRATION - Rok 2014

  This paper presents selected results and aspects of themultidisciplinary and interdisciplinary research oriented for the experimental and numerical study of the structural dynamics of a bend-twist coupled full scale section of awind turbine blade structure.Themain goal of the conducted research is to validate finite elementmodel of themodified wind turbine blade section mounted in the flexible support structure accordingly to the...

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• Experimental study on plate modal parameters

  Publikacja

  • M. Hirsz
  • K. Wilde

  - Rok 2005

  Test doświadczalny jest częścią systemu diagnostycznego. Autorzy badają wpływ dodatkowej masy na parametry modalne wolno popartej stalowej płytyi. Artykół przedstawia technikę wyznaczania parametrów modalnych dla systemów monitorowania konstrukcji.The experimental test introduced in the paper is the part of the diagnostic system. The authors investigate the influence of the additional mass on modal parameters of simply supported...

• Modal analysis of a steel grandstand

  Publikacja

  • N. Lasowicz
  • R. Jankowski

  - Technology and Art - Rok 2012

  Among the issues related to the idea of sustainable society is the safety of civil engineering structures devoted to satisfy different needs of people. One of the types of structures devoted to satisfy recreational needs are grandstands, which are used during sport events or music concerts. It is obligatory to consider interaction between structure and crowd load especially when the crowd movement involves rhythmic jumping, dancing,...

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• Finite Element model updating on experimental modal parameters

  Publikacja

  • M. Hirsz

  - Rok 2008

• Modal Reduction and Analysis of Gyroscopic Systems

  Publikacja

  • C. Orlikowski
  • R. Hein

  - Solid State Phenomena - Rok 2010

  The paper introduces the method of the modal reduction of systems that experience the Coriolis acceleration or gyroscopic effect component. In such cases corresponding system equations are non-self-adjoined. To solve the problem modal reduced model is built up for the system without Coriolis acceleration or gyroscopic effect terms. These phenomena are included by application of any lumping technique. Hence, the final reduced model...

• Modal analysis of cylindrical steel tanks

  Publikacja

  • D. Burkacki
  • R. Jankowski

  - Rok 2011

  Cylindrical steel tanks are very popular structures used for storage of products of chemical and petroleum industries. Their safety and reliability is crucial because any failure could have serious consequences. The aim of present paper is to show the results of the first phase of investigation of seismic behaviour such structures. Modal analysis using Finite Element Method (FEM) for three models of real tanks used in Poland has...

• Improvement of damage detection methods based on experimental modal parameters

  Publikacja

  • M. Radzieński
  • M. Krawczuk
  • M. Palacz

  - MECHANICAL SYSTEMS AND SIGNAL PROCESSING - Rok 2011

  W pracy przedstwiono sposoby porawy czułości metod detekcji uszkodzeń wykorzystujacych eksperyentalne parametry modalne konstrukcji. Wykazano, że zastosowanie zawansowanych technik obróbki sygnałów pomiarowych pozwala zdecydowanie poprwaić skutecznośc znanych z literatury metod.

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• Modal FEM Analysis of Ferrite Resonant Structures

  Publikacja

  • M. Warecka
  • G. Fotyga
  • P. Kowalczyk
  • R. Lech
  • M. Mrozowski
  • A. Pacewicz
  • B. Salski
  • J. Krupka

  - IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS - Rok 2022

  The finite-element method (FEM) is applied for modal analysis of ferrite-loaded spherical resonators. To improve the efficiency of the numerical calculations, the body-of-revolution (BOR) technique is utilized. Due to the frequency-dependent ferrite permeability, FEM leads to a nonlinear eigenvalue problem that is challenging to solve. To this end, Beyn’s method is proposed. The effectiveness of the proposed approach is confirmed...

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• Diagnosis of the Vilnius Cathedral Tower by modal analysis

  Publikacja

  • A. Tomaszewska
  • A. Jaras

  - Rok 2004

  Praca dotyczy wstępnych badań diagnostycznych dzwonnicy katedralnej w Wilnie. Analiza oparta jest na pomiarach drgań obiektu, wykonanych podczas wymuszeń losowych (ruch uliczny, wiatr etc.) oraz podczas bicia dzwonów. Na ich podstawie określono kilka pierwszych częstości drgań swobodnych wieży. Zaobserwowano znaczne wzmocnienie amplitudy drgań z pierwszą częstością własną w wynikach pomiarów wykonywanych przy biciu dzwonów. Wskazuje...

• Modal analysis of railway current collectors using Autodesk Inventor

  Publikacja

  • A. Wilk
  • S. Judek
  • K. Karwowski
  • M. Mizan
  • P. Kaczmarek

  - Rok 2018

  The paper presents the results of modal analysis of railway current collector type 160EC. In the first place, the analysis was carried out analytically for a simplified two lumped mass pantograph model. Then numerical analysis was conducted in the Autodesk Inventor (AI) on the prepared multibody model using the AI modal analysis algorithm, which is based on the finite element method (FEM). Model elements which are most relevant...

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• Numerical modal analysis of a vertical rising steel water gate

  Publikacja

  • K. Brusewicz
  • R. Jankowski

  - Rok 2017

  Vertical rising steel water gates are very common not only in Poland and Germany but also in other countries of the world. Their popularity is mainly attributed to their simplicity of construction, which makes their production process cheaper and faster when compared to other solutions. The aim of this paper is to conduct a numerical modal analysis to examine the eigenvalues and eigenmodes of a vertical rising steel gate. Two cases...

• Rigorous Modal Analysis of Structures Containing Inhomogeneous Dielectric Cylinders.

  Publikacja

  • M. Polewski
  • R. Lech
  • J. Mazur

  - Rok 2004

  W pracy wykorzystano zmodyfikowaną procedurę iteracyjną i metodę dopasowania rodzajów w celu analizy struktur zawierających asymetrycznie umieszczone, niepełnej wysokości lub wielowarstwowe, niejednorodne, cylindryczne rezonatory dielektryczne. Analiza bazuje na nowatorskiej koncepcji zwanej hybrydową macierzą impedancyjną (HIM - hybryd impedancje matrix), która opisuje relacje pomiędzy całkowitym polem elektrycznym i magnetycznym...

• Damage Detection in the Wind Turbine Blade Using Root Mean Square and Experimental Modal Parameters

  Publikacja

  • Ł. Doliński
  • M. Krawczuk
  • A. Żak

  - Rok 2019

  The paper presents results of an experimental study related to a non-destructive diagnostic technique used for preliminary determination the location and size of delamination in composite coatings of wind turbine blades. The proposed method of damage detection is based on the analysis of the ten first mode shapes of bending vibrations, which correspond to displacements of rotor blades perpendicular to the rotor plane. Modal parameters...

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• MODAL ANALYSIS OF REAL TIMBER FRAME HOUSES WITH DIFFERENT INSULATION MATERIALS

  Publikacja

  • M. Szczepański
  • W. Migda
  • R. Jankowski

  - Advances in Science and Technology Research Journal - Rok 2016

  The aim of this article is to present the results of a numerical modal analysis of two actual structures of timber frame buildings and the different behaviour due to the used insulation material. One model of the timber structure was filled with mineral wool, while the other with polyurethane foam. During the modal analysis, eigenvalues for both models have been determined. The results of the analysis clearly show the increase...

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• Material Parameters Identification of Historic Lighthouse Based on Operational Modal Analysis

  Publikacja

  • A. Tomaszewska
  • M. Drozdowska
  • M. Szafrański

  - Materials - Rok 2020

  In the present paper, the identification of the material parameters of a masonry lighthouse is discussed. A fully non-invasive method was selected, in which the material properties were determined via numerical model validation applied to the first pair of natural frequencies and their related mode shapes, determined experimentally. The exact structural model was built by means of the finite element method. To obtain experimental...

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• Modal analysis of a fish-belly flap type of steel water gate

  Publikacja

  • K. Brusewicz
  • W. Sterpejkowicz-Wersocki
  • R. Jankowski

  - Rok 2018

  ABSTRACT: The results of a modal analysis of the fish-belly flap type of steel water gate are presented in the paper. The analysis was conducted for a detailed numerical model of the structure using four-node quadrilateral shell elements. The study was focused on the examination of the influence of positioning of the flap gate and hydrostatic pressure of water on the eigenvalues and eigenmodes of the structure. The results of the study...

• Modal analysis of temporary steel grandstand equipped with different bracing systems

  Publikacja

  • N. Lasowicz
  • R. Jankowski

  - Rok 2018

  The aim of this paper is to present the results of numerical analysis focused on temporary steel scaffolding grandstand. The investigation has been devoted to modal analysis where modes of free vibrations and corresponding natural frequencies have been estimated and compared. The structure was equipped with different types of stiffener members. One on them is a typical tubular stiffener, while the second one is spe-cially designed...

• Modal Analysis of Planar Elliptical Resonator Deposited on Unshielded Dielectric Slab

  Publikacja

  • M. Pergoł
  • W. Zieniutycz

  - Rok 2016

  Modal analysis of isolated open planar elliptical patch placed on dielectric slab is presented in the paper. It applies concept of Illuminating Modes which is formulated for the case of two-side opened structure. The current on patch is expanded in basis functions in form of Mathieu radial and angular functions. The spectrum of excited modes for exemplary planar resonators is presented and discussed using the concept of power of...

• Modal Analysis of a Steel Radial Gate Exposed to Different Water Levels

  Publikacja

  • K. Brusewicz
  • W. Sterpejkowicz-Wersocki
  • R. Jankowski

  - Archives of Hydro-Engineering and Environmental Mechanics - Rok 2017

  With the increase in water retention needs and planned river regulation, it might be important to investigate the dynamic resistance of vulnerable elements of hydroelectric power plants, including steel water locks. The most frequent dynamic loads affecting hydroengineering structures in Poland include vibrations caused by heavy road and railway traffic, piling works and mining tremors. More destructive dynamic loads, including...

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• DYNWIR S-70 program for modal analysis of multisupported and multimass rotors

  Publikacja

  • Ł. Breńkacz
  • P. Bagiński
  • M. Bogulicz

  - Diagnostyka - Rok 2013

  The article provides a brief description of the program Dynwir-S-70 (currently being developed in the Rotor Dynamics and Slide Bearings Department in the Institute of Fluid-Flow Machinery Polish Academy of Sciences in Gdansk) which is a program for analysis of multi-supported and multi-mass rotors. Used algorithms and the construction of mass and stiffness matrix were presented. Damping matrix structure based on Rayleigh damping...

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• A Novel Modal Technique for Time and Frequency Domain Analysis of Waveguide Components

  Publikacja

  • Ł. Kulas
  • P. Kowalczyk
  • M. Mrozowski

  - IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS - Rok 2011

  W pracy zaprezentowano, nową i szybką metodę analizy komponentów falowodowych. Metoda opiera się na kombinacji metody różnic skończonych, metody dekompozycji dziedziny obliczeniowej, redukcji rzędu modelu oraz dyskretnych rozwinięć funkcyjnych. Przedstawiona technika pozwala na skrócenie czasu analizy układu nawet o dwa rzędy wielkości w stosunku do poprzednich algorytmów.

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• Comparison of modal and finite-element methods in the vibrational analysis of marine propulsion systems

  Publikacja

  • C. Orlikowski
  • S. Sawiak

  - Prace Naukowe Politechniki Radomskiej: Transport - Rok 2003

  W okrętowych układach napędowych występują dwa typy części składowych. Pierwszym z nich są odcinki wałów, które należą do elementów o ciągłym rozkładzie własności masowych, sprężystych i tłumiących oraz elementy o parametrach skupionych, do których można zaliczyć śrubę napędową, tarcze sprzęgieł i inne. W pracy porównano dwie metody modelowania takich układów. Pierwsza z nich związana jest z tworzeniem modeli przybliżonych w oparciu...

• Analysis of Modal Parameters Using a Statistical Approach for Condition Monitoring of the Wind Turbine Blade

  Publikacja

  • Ł. Doliński
  • M. Krawczuk

  - Applied Sciences-Basel - Rok 2020

  The primary objective of the presented paper is the numerical and experimental investigation related to developing a useful diagnostic method, which can be used for determining the site and size of damage in laminated shells of wind turbine blades. The described detection technique is based on the analysis of low frequencies bending vibrations mode shapes of rotor blades. The authors used the commonly applied statistics methods...

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• Detection of Delamination in Laminate Wind Turbine Blades Using One-Dimensional Wavelet Analysis of Modal Responses

  Publikacja

  • Ł. Doliński
  • M. Krawczuk
  • A. Żak

  - SHOCK AND VIBRATION - Rok 2018

  This paper demonstrates the effectiveness of a nondestructive diagnostic technique used to determine the location and size of delamination in laminated coatings of wind turbine blades. This is realized based on results of numerical and experimental investigations obtained by the use of the finite element method (FEM) and laser scanning vibrometry (LSV). The proposed method is based on the one-dimensional continuous wavelet transform...

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• Mode vibrations of plates – experimental analysis

  Publikacja

  • A. D. Kaczmarek-Penia•kova
  • L. Javorek
  • K. Orłowski

  - Annals of WULS, Forestry and Wood Technology - Rok 2014

  In this paper results of the square MDF plate and circular saw blades examination with the use of the harmonic method to static identification of resonant frequencies and shapes of mode vibrations are presented. Obtained results reveled that for circular saws with large holes in a saw blade appeared two resonant frequencies for the same nodal number.

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• Non-Destructive Diagnostics of Concrete Beams Strengthened with Steel Plates Using Modal Analysis and Wavelet Transform

  Publikacja

  • M. Knak
  • E. Wojtczak
  • M. Rucka

  - Materials - Rok 2021

  Externally bonded reinforcements are commonly and widely used in civil engineering objects made of concrete to increase the structure load capacity or to minimize the negative effects of long-term operation and possible defects. The quality of adhesive bonding between a strengthened structure and steel or composite elements is essential for effective reinforcement; therefore, there is a need for non-destructive diagnostics of adhesive...

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• Uncertainty quantification of modal parameter estimates obtained from subspace identification: An experimental validation on a laboratory test of a large-scale wind turbine blade

  Publikacja

  • S. Greś
  • R. Riva
  • C. Y. Süleyman
  • P. Andersen
  • M. Łuczak

  - ENGINEERING STRUCTURES - Rok 2022

  The uncertainty afflicting modal parameter estimates stems from e.g., the finite data length, unknown, or partly measured inputs and the choice of the identification algorithm. Quantification of the related errors with the statistical Delta method is a recent tool, useful in many modern modal analysis applications e.g., damage diagnosis, reliability analysis, model calibration. In this paper, the Delta method-based uncertainty...

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• Experimental and theoretical analysis of dryout in annular flow

  Publikacja

  • D. Mikielewicz
  • M. Gliński
  • J. Wajs

  - Rok 2011

  W pracy opisano badania eksperymentalne kryzysu wrzenia typu dryout, przeprowadzone w pionowych rurkach o średnicy wewnętrznej 1.15 i 2.3 mm z wykorzystaniem dwóch czynników roboczych, tj. SES36 i R123. W oparciu o wyniki tych badań zaproponowano ogólną korelację na krytyczny strumień ciepła w minikanałach.

• An Experimental and Numerical Analysis of Water Hammer Phenomenon in Slurries

  Publikacja

  • A. Kodura
  • P. Stefanek
  • K. Weinerowska-Bords

  - JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME - Rok 2017

  The analysis of slurry transportation in pressure pipelines is important both from practical and theoretical point of view. Due to the nature of the medium, the number of problems arising in the course of design, operation, measurements and mathematical modeling is much higher compared to the cases where the flowing liquid is homogeneous. The equations describing the flow are more complex, and higher number of the parameters is...

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• Experimental and numerical analysis of wave propagation in ground anchors

  Publikacja

  • B. Zima
  • M. Rucka

  - Rok 2016

  The article focuses on wave propagation phenomenon in ground anchors. The main aim of the investigation is the non-destructive diagnostics and the assessment of the state of ground anchors, using the guided wave propagation method. Laboratory models of anchors with different lengths of the anchor body were tested and voltage signals of propagating waves were registered at several locations. For all tested specimens corresponding...

• Experimental and numerical analysis of an aluminum cantilevered beam with polymer adhesive

  Publikacja

  • N. Lasowicz
  • R. Jankowski

  - Procedia Engineering - Rok 2017

  In this paper, experimental and numerical investigation on a composite cantilevered aluminum beam has been conducted. The subject of the study consists of two plain aluminum elements bonded with polymer adhesive of different thickness. It has been proven in the previous study that this kind of material has high damping properties. During an experimental investigation, value of damping ratios have been obtained. The aim of a numerical...

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• FEM ANALYSIS AND EXPERIMENTAL TESTS OF RIGID RISER HANGING SYSTEM

  Publikacja

  • A. Olszewski
  • M. Wodtke
  • A. Wójcikowski

  - Polish Maritime Research - Rok 2018

  The article presents the analysis, project, and experimental examination of an original rigid riser for Coil Tubing Pipes. The principle of riser operation is based on the use of friction forces. The research included the FEM analysis of the designed riser, calculations of the required bolt tensions, and checking the effect of the clamping force on stress distribution in the pipeline. The results of computer simulation were verified...

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• Experimental analysis of chip removing system in circular sawing machine

  Publikacja

  • J. Barański
  • M. Jewartowski
  • J. Wajs
  • T. Pikała

  - Trieskove a Beztrieskove Obrabanie Dreva - Rok 2016

  Paper presents analysis of the process of removing the wood chips generated during the cutting of the material on the circular sawing machine. The attention is focused on the upper cover of the chip removing system. Within the framework of the work a systematic experimental study of pressure distribution in the cover during operation of the selected rotational speed of saw blade with a diameter of 300 mm and 450 mm was carried...

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• EXPERIMENTAL ANALYSIS OF RUBBER AND STYROFOAM BUMPERS INFLUENCE ON THE COLLIDING STRUCTURES

  Publikacja

  • B. Sołtysik

  - Dokonania Młodych Naukowców - Rok 2014

  Past and recent investigations of colliding structures under seismic excitation confirmed that pounding may have a significant influence on the structural response. Interactions between adjacent buildings may cause serious damage to the structures, leading even to its total collapse. The main reason of earthquake-induced pounding, besides insufficient distance between structures, are differences in stiffness or mass of colliding structures....

• Positron scattering on molecular hydrogen: Analysis of experimental and theoretical uncertainties

  Publikacja

  • K. Fedus
  • J. Franz
  • G. P. Karwasz

  - PHYSICAL REVIEW A - Rok 2015

  Experiments performed in recent years on positron scattering from molecular hydrogen indicated a rise of the total cross section in the limit of zero energy, but essentially disagree on the amplitude of this rise. Mitroy and collaborators [J.-Y. Zhang et al., Phys. Rev. Lett. 103, 223202 (2009)] predicted a scattering length somewhat different from values deduced experimentally. Using a Markov chain Monte Carlo modified effective...

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• FE analysis of support-specimen interaction of compressive experimental test

  Publikacja

  • K. Wołoszyk
  • Y. Garbatov

  - Rok 2019

  The objective of this work is to investigate the support-specimen interaction during the compressive experimental testing of stiffened plates. The interaction is analyzed employing the nonlinear Finite Element Method using the commercial software ANSYS. The connection between the stiffened plate and testing supports is modelled with the use of contact elements, where several possible interaction scenarios are investigated, and...

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• A numerical and experimental analysis of multi-hole orifice in turbulent flow

  Publikacja

  • A. Golijanek-Jędrzejczyk
  • A. Mrowiec
  • S. Kleszcz
  • R. Hanus
  • M. Zych
  • M. Jaszczur

  - MEASUREMENT - Rok 2022

  In this research study, the comprehensive metrological analysis is investigated for a 4-hole orifice with module m = 0.25 installed in the pipeline with an internal diameter of 50 mm. A detailed numerical simulation was performed for the turbulence models: k-ε-realizable and k-ω-BSL. The novelties of the research include model validation by comparing the results of numerical studies with the experiment conducted in the area of...

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• Experimental study and numerical calculations in the analysis of thin-walled structures

  Publikacja

  • A. Piekarczuk
  • A. Piekarczuk

  - Rok 2017

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• Experimental and numerical analysis of streamwise vortex generator for subsonic flow

  Publikacja

  • P. Flaszyński
  • R. Szwaba

  - Chemical and Process Engineering-Inżynieria Chemiczna i Procesowa - Rok 2006

  W pracy przedstawiono porównanie wyników obliczeń numerycznych dwoma kodami (FLUENT i SPARC) na tle badań eksperymentalnych generatora wirów wzdłużnych. Przedstawiono wyniki dla liczb Macha przepływu głównego 0.3 i 0.8. Porównano ciśnienie całkowite w dwóch przekrojach za otworem przez który realizowany jest wydmuch. Przedstawiono strukturę wiru wzdłużnego uzyskaną dla obu programów. Średnica otworu jetu jest równa 1mm, co odpowiada...

• EXPERIMENTAL ANALYSIS OF CONNECTION BETWEEN OBJECT-ORIENTED METRICS AND SOFTWARE CHANGEABILITY

  Publikacja

  • T. Sanner
  • A. Czyżewski

  - Rok 2013

  For the purpose of video surveillance software quality assessment in this work the ISO/IEC-9126 norm was used with a particular focus on maintainability of the software system. The paper presents a study on the connection between software metrics derived from the static analysis of the source code and changeability of the video surveillance software system. It is shown that meeting requirements of software quality metrics may result...

• Diagnostic system of cylindrical shell based on experimental modes and wavelet analysis

  Publikacja

  • M. Rucka
  • K. Wilde

  - Rok 2006

  Artykuł poświęcony jest technice lokalizacji uszkodzeń w powłoce cylindrycznej. Na podstawie eksperymentalnie wyznaczonych postaci drgań oraz analizy falkowej wyznaczono miejsce uszkodzenia. Przedstawiono algorytm poszukiwania uszkodzeń poprzez zastosowanie sztycznej sieci neuronowej.

• Experimental analysis of coefficients of local resistance on elbows in multilayer pipe systems

  Publikacja

  • N. K. Gietka

  - Acta Scientiarum Polonorum Formatio Circumiectus - Rok 2015

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• Analysis of experimental and simulated vibrational spectra for the antiferroelectric liquid crystal 12OBBB1M6

  Publikacja

  • R. Wrzalik
  • K. Merkel
  • A. Kocot
  • B. Cieplak

  - JOURNAL OF CHEMICAL PHYSICS - Rok 2002

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• Glioblastoma-derived spheroid cultures as an experimental model for analysis of EGFR anomalies

  Publikacja

  • M. Witusik-Perkowska
  • P. Rieske
  • K. Hułas-Bigoszewska
  • M. Zakrzewska
  • R. Stawski
  • D. Kulczycka-Wojdala
  • M. Bieńkowski
  • E. Stoczyńska-Fidelus
  • S. Grešner
  • S. Piaskowski... i 6 innych

  - JOURNAL OF NEURO-ONCOLOGY - Rok 2011

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• Theoretical and experimental flow analysis through the model water turbine stage

  Publikacja

  • M. Banaszek

  - Rok 2005

  W artykule zaprezentowano teoretyczną i eksperymentalną analizę przepływu przez stopień modelowej turbiny wodnej. Przedstawiono rozwiązanie zadania prostego dla dwuwymiarowego modelu przepływu. Zaprezentowano przykład numerycznej symulacji przepływu za pomocą komeryjnych kodów obliczeniowych oraz porównano wyniki symulacji numerycznych przepływu z wynikami badań eksperymentalnych.

• Experimental-Numerical Analysis of the Effect of Bar Diameter on Bond in Pull-Out Test

  Publikacja

  • M. Burdziński
  • M. Niedostatkiewicz

  - Buildings - Rok 2022

  Bar diameter is one of the basic factors affecting bond behavior, which is still of interest due to opposing opinions regarding its effect on bond behavior in the pull-out test. This paper presents an experimental and numerical bond analysis of ribbed reinforcing bar in concrete. The aim was to experimentally evaluate the effect of bar diameter on the bond behavior in the pull-out test and to perform numerical simulations of the...

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• Experimental and numerical analysis of the modified TB32 crash tests of the cable barrier system

  Publikacja

  • D. Bruski
  • S. Burzyński
  • J. Chróścielewski
  • K. Jamroz
  • Ł. Pachocki
  • W. Witkowski
  • K. Wilde

  - ENGINEERING FAILURE ANALYSIS - Rok 2019

  Road restraint systems, including safety barriers, are one of the means used to improve road safety. Currently, they can be allowed to general use after passing the specific crash tests. However, it is always important and desirable to evaluate their performance under various realistic conditions, which can happen on the roads. In this study, the behaviour of the cable barrier system in impact conditions different than assumed...

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• Experimental Study of Polish Sausage Drying Kinetics and Contraction by Image Data Analysis

  Publikacja

  • B. Jakubowska

  - Acta Universitatis Cibiniensis - Series E: Food Technology - Rok 2023

  The goal of this paper has been to add an experimental data set for drying a meat product and provide a comparison with well-established thin-layer drying models. This article presented experimental investigations on the convective drying of Polish sausage slices at a temperature of 40°C. Slices have been in the thickness of 3 to 8mm. Measurements of mass loss and size change were performed. The data have been presented in the...

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• Experimental and Numerical Analysis of Air Trapping in a Porous Medium with Coarse Textured Inclusions

  Publikacja

  • P. Szymańska
  • W. Tisler
  • A. Szymkiewicz
  • C. Schutz
  • I. Neuweiler
  • R. Helmig

  - Acta Geophysica - Rok 2016

  The paper presents a 2D upward infiltration experiment performed on a model porous medium consisting of fine sand background with two inclusions made of coarser sands. The purpose of the experiment was to investigate the effects of structural air trapping, which occurs during infiltration as a result of heterogeneous material structure. The experiment shows that a significant amount of air becomes trapped in each of the inclusions. Numerical...

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• Experimental and Computational Analysis of the Ship Propeller in Open Water Conditions for Inclined Flow

  Publikacja

  • J. Felicjancik
  • P. Król
  • B. Tomasz

  - Rok 2016

  The paper presents the results of computational analyses simulating the open water tests of ship propeller in inclined flow. The results of computations are compared with the results of corresponding experimental analyses carried out in the towing tank of Ship Design and Research Centre (CTO S.A.). The object of the research was the model propeller identified as CP469. The aim of the study was to validate the results of numerical...

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• Comparative Analysis of Numerical and Experimental Studies of the Airflow Around the Sample of Urban Development

  Publikacja

  • K. Zielonko-Jung
  • M. Poćwierz
  • K. Gumowski
  • O. Oskar

  - Bulletin of the Polish Academy of Sciences-Technical Sciences - Rok 2015

  In this paper, on the background of a short overview of the recent advances in the field of Environmental Wind Engineering (EWE), a comparison of wind tunnel experiment and numerical simulation for some cases of airflow around an urban layout have been reported. The purpose of the study is quantitative and qualitative comparison of measurements in the wind tunnel as well as numerical simulation using Ansys Fluent software. The...

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• Experimental analysis on the risk of vortex ventilation and the free surface ventilation of marine propellers

  Publikacja

  • A. Kozlowska
  • S. Steen
  • A. Kozłowska

  - APPLIED OCEAN RESEARCH - Rok 2017

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• Experimental investigations of interturn faults in transformer winding using frequency response analysis

  Publikacja

  • A. Wilk

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Rok 2010

  W referacie przedstawiono wyniki badań eksperymentalnych specjalnego Transformatora Trakcyjnego o Zredukowanej Skali (TTZS) z wykorzystaniem metody analizy odpowiedzi w dziedzinie częstotliwości. Pokazano wybrane wyniki analiza FRA nieuszkodzonych symetrycznych uzwojeń strony wtórnej. Zmierzono widmo amplitudowe w przypadku zwarć zwojowych pojedynczych zwojów niektórych cewek. Wykazano, że miejsce wystąpienia zwarcia zwojowego...

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• Experimental and numerical analysis of the pyrolysis dynamics of a single wood particle: presentation of the radiographic technique

  Publikacja

  • P. Kazimierski
  • K. Januszewicz
  • P. Hercel
  • D. Kardas

  - WOOD SCIENCE AND TECHNOLOGY - Rok 2023

  Pyrolysis is an oxygen-free process for the thermal decomposition of raw materials. The heat conduction and flow of pyrolysis products (i.e., the gas fraction and liquid vapour generated during pyrolysis) influence the process and products. In this work, the influence of the orientation of wooden particle fibres with respect to the direction of the heat source on the dynamics of the process was investigated, where there were two...

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• ENERGY SAVINGS BY APPLICATION OF SUPERCAPACITOR STORAGE IN TROLLEYBUS SUPPLYING STATION – ANALYSIS OF EXPERIMENTAL RESULTS

  Publikacja

  • M. Bartłomiejczyk
  • L. Jarzębowicz

  - Czasopismo Techniczne - Rok 2016

  In 2011–2013, stationary supercapacitor storage developed by the Electrotechnical Institute in Warsaw was put into trial operation in the trolleybus substation “Północna” (North) located in Gdynia. The article presents the results recorded during supercapacitor storage operation and discusses the impact of the storage on energy consumption savings. Guidelines for selecting a location for stationary supercapacitor storage...

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• Energy savings by application of supercapacitor storage in trolleybus supplying station - analysis of experimental results

  Publikacja

  • M. Bartłomiejczyk
  • L. Jarzębowicz

  - Rok 2014

  Storage devices can be divided into two groups: on-board energy storage devices, which are placed in the vehicles and off-board energy storage devices situated in traction substations or between them. Current research is focused mainly on two objectives. The first is to reduce the energy demand by introducing on-board energy storages in light electric vehicles like trams, trolleybuses or electrobuses. The latter is to provide a...

• Experimental and analytical analysis of punching shear in flat slabs supported on column topped with concrete head

  Publikacja

  • M. Grabski
  • A. Ambroziak

  - CONSTRUCTION AND BUILDING MATERIALS - Rok 2023

  An experimental laboraatory test of the two series of slab-column elements topped with drop panels of varying sizes is described in this paper. The scope of the paper is to investigate the influence of the drop panel size and stiffness on the behaviour of the connection between the flat slab and the column topped by the concrete head. The impact of the head size and stiffness is analysed analytically and experimentally. The experimental...

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• Theoretical and experimental analysis of guided wave propagation in plate-like structures with sinusoidal thickness variations

  Publikacja

  • B. Zima
  • J. Moll

  - Archives of Civil and Mechanical Engineering - Rok 2023

  Guided waves have attracted significant attention for non-destructive testing (NDT) and structural health monitoring (SHM) due to their ability to travel relatively long distances without significant energy loss combined with their sensitivity to even small defects. Therefore, they are commonly used in damage detection and localization applications. The main idea of incorporating guided waves in NDT and SHM is based on processing...

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• Experimental analysis of the behaviour of different types of joints in the steel structure model subjected to earthquake loading

  Publikacja

  • T. Jaroszewski
  • T. Falborski
  • R. Jankowski

  - Journal of Physics : Conference Series - Rok 2021

  The present paper reports the results of the experimental study performed to investigate the behaviour of two different types of joints (destroyed and welded ones) in the model of the steel structure under seismic excitations. The structure was subjected to three earthquakes, namely Kobe, Loma Prieta and Northridge, using the shaking table investigation. The results obtained from the study...

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• Solubility of dapsone in deep eutectic solvents: Experimental analysis, molecular insights and machine learning predictions

  Publikacja

  • T. Jeliński
  • M. Przybyłek
  • R. Różalski
  • P. Cysewski

  - Polimery w Medycynie - Rok 2024

  Background. Dapsone (DAP) is an anti-inflammatory and antimicrobial active pharmaceutical ingredient used to treat, e.g., AIDS-related diseases. However, low solubility is a feature hampering its efficient use. Objectives. First, deep eutectic solvents...

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• Analysis and Experimental Verification of Improving the EEDI of a Ship using a Thruster Supplied by a Hybrid Power System

  Publikacja

  • J. Mindykowski
  • Ł. Wierzbicki
  • M. Górniak
  • A. Piłat

  - Polish Maritime Research - Rok 2024

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• Composite Beams with glass and reinforced or prestressed concrete - early stage of a theorethical and experimental analysis of a shear zone

  Publikacja

  • M. Hirsz
  • K. Nagrodzka-Godycka

  - Rok 2017

  The aim of this article is to present a forgoing preparation for a theoretical and experimental analysis of a shear zone of a composite beams with glass and reinforced or prestressed concrete. Authors present their current knowledge, achievements and predicted challenges in later stages of the research. Properties of component materials are presented in the context of compensating weaknesses of one material with strengths of the...

• Analysis of IMS/NGN Call Processing Performance Using Phase-Type Distributions Based on Experimental Histograms

  Publikacja

  • S. Kaczmarek
  • M. Sac

  - Advances in Intelligent Systems and Computing - Rok 2018

  The paper describes our further research done with the proposed analytical and simulation traffic models of the Next Generation Network (NGN), which is standardized for delivering multimedia services with strict quality and includes elements of the IP Multimedia Subsystem (IMS). The aim of our models of a single IMS/NGN domain is to evaluate two standardized call processing performance parameters, which appropriate values are very...

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• Experimental analysis of shear zone patterns in sand for earth pressure problems using Particle Image Velocimetry

  Publikacja

  • M. Niedostatkiewicz
  • D. Leśniewska
  • J. Tejchman

  - STRAIN - Rok 2011

  Wykonano doświadczenia modelowe nad rozkładem stref ścinania w piasku za ścianką szczelną przy zastosowaniu metody PIV. Doświadczenia wykonano dla naporu i odporu piasku dla translacji, obrotu wokół punktu górnego i obrotu wokół punktu dolnego ścianki szczelnej. Zbadano wpływ początkowego zagęszczenia piasku na rozkład stref ścinania.

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• Experimental validation of the theoretical analysis of heat transfer between a liquid layer formed by an impinging jet and a solid surface

  Publikacja

  • S. Gumkowski

  - Chemical and Process Engineering-Inżynieria Chemiczna i Procesowa - Rok 2007

  Przedstawiono wyniki badań eksperymentalnych wymiany ciepła między poziomą powierzchnią a przepływająca po niej warstwa cieczy utworzoną z napływającej strugi gazowo-cieczowej. Wyniki badań eksperymentalnych porównano z modelem teoretycznym zjawiska.

• Study of the Experimental and Simulated Vibrational Spectra Together with Conformational Analysis of Thioether Cyanobiphenyl-Based Liquid Crystal Dimers

  Publikacja

  • A. Kocot
  • B. Loska
  • Y. Arakawa
  • G. Mehl
  • K. Merkel

  - International Journal of Molecular Sciences - Rok 2022

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• Advanced Experimental and Numerical Analysis of Behavior Structural Materials Including Dynamic Conditions of Fracture for Needs of Designing Protective Structures

  Publikacja

  • M. Grazka
  • L. Kruszka
  • W. Mocko
  • M. Klosak

  - Rok 2020

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• Thermal analysis and experimental verification of permanent magnet synchronous motor by combining lumped-parameter thermal networks with analytical method

  Publikacja

  • M. Nguyen
  • J. Woo
  • H. Shin
  • Y. Lee
  • H. Lee
  • K. Shin
  • A. Phung
  • J. Choi

  - AIP Advances - Rok 2023

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• Experimental analysis of wear resistance of compacts of fine-dispersed iron powder and tungsten monocarbide nanopowder produced by impulse pressing

  Publikacja

  • A. Bragov
  • L. Igumnov
  • A. Konstantinov
  • A. Lomunov
  • E. Rusin
  • V. Eremeev

  - WEAR - Rok 2020

  The paper presents the results of studying the structure and wear resistance of compacts produced from fine dispersed reduced iron powder (average particle size 3–mu m) with the addition of tungsten carbide (WC) nanopowder with the average particle size of 25–30 nm. The mass fraction of tungsten carbide (wolfram carbide) in the powder composition was 5% and 10% of the total mass. Impulse pressing was conducted using the modified...

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• ASSESSING THE POTENTIAL REPLACEMENT OF MINERAL OIL WITH ENVIRONMENTALLY ACCEPTABLE LUBRICANTS IN A STERN TUBE BEARING: AN EXPERIMENTAL ANALYSIS OF BEARING PERFORMANCE

  Publikacja

  • J. Kowalski
  • W. Leśniewski
  • D. Piątek
  • D. Cuper-Przybylska

  - Polish Maritime Research - Rok 2021

  T his study compares the performance of a plain bearing, with a similar structure to a tail shaft stern bearing, lubricated with either mineral oil or an environmentally acceptable lubricant (EAL). The main characteristic of the bearing is its length/diameter ratio of <1. Measurements are carried out with the bearing operating under loads from 0.5 to 1 MPa and seven speeds ranging from 1 to 11 rev/s. The bearing lubricated...

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• Theoretical analysis and experimental tests of tilting pad journal bearings with shoes made of polymer material and low-boiling liquid lubrication

  Publikacja

  • G. Żywica
  • A. Olszewski
  • P. Bagiński
  • A. Andrearczyk
  • T. Żochowski
  • P. Klonowicz

  - TRIBOLOGY INTERNATIONAL - Rok 2023

  Selecting the appropriate bearing system for the rotor requires a good knowledge of the available solutions and the operating conditions of the machine. For newly designed machinery operating in adverse conditions, selecting bearings that ensure correct and long-lasting operation can be extremely challenging. Difficulties in- crease when the machine’s operating parameters are beyond the technical capabilities of available technical solutions....

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• A new construction of shell-and-tube heat exchanger with impinging jets and minichannels technologies for heat recovery from gases – experimental analysis

  Publikacja

  • J. Wajs
  • R. Michałka
  • A. Gołąbek
  • T. Kura

  - Rok 2020

  A dynamic development of technologies allowing waste heat utilization is observed in a correspondence with a pro-ecological approach of the zero waste idea. Such approach becomes the most demanding in the area of low-temperature was heat sources, especially gaseous media. Till now, they were usually not utilized due to unfavorable thermal conditions and high costs. Therefore, the zero waste approach directs research on techniques...

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• The Effect of Zirconium Dioxide (ZrO2) Nanoparticles Addition on the Mechanical Parameters of Polymethyl Methacrylate (PMMA): A Systematic Review and Meta-Analysis of Experimental Studies

  Publikacja

  • K. Chęcińska
  • M. Chęciński
  • M. Sikora
  • Z. Nowak
  • S. Karwan
  • D. Chlubek

  - Polymers - Rok 2022

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• Vibrational Sum-Frequency Generation Activity of a 2,4-Dinitrophenyl Phospholipid Hybrid Bilayer: Retrieving Orientational Parameters from a DFT Analysis of Experimental Data

  Publikacja

  • D. Lis
  • J. Guthmuller
  • B. Champagne
  • C. Humbert
  • B. Busson
  • A. Peremans
  • F. Cecchet

  - CHEMPHYSCHEM - Rok 2013

  The vibrational nonlinear activity of films of 2,4-dinitrophenyl phospholipid (DNP) at the solid interface is measured by sum-frequency generation spectroscopy (SFG). Hybrid bilayers are formed by a LangmuirSchaefer approach in which the lipid layer is physisorbed on top of a self-assembled monolayer of dodecanethiol on Pt with the polar heads pointing out from the surface. The SFG response is investigated in two vibrational frequency...

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• High pressure and time resolved studies of optical properties of n-type doped GaN/AlN multi-quantum wells: Experimental and theoretical analysis

  Publikacja

  • A. Kaminska
  • D. Jankowski
  • P. Strak
  • K. Korona
  • M. Beeler
  • K. Sakowski
  • E. Grzanka
  • J. Borysiuk
  • K. Sobczak
  • E. Monroy... i 2 innych

  - JOURNAL OF APPLIED PHYSICS - Rok 2016

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• Analysis of an Attenuator Artifact in an Experimental Attack by Gunn–Allison–Abbott Against the Kirchhoff-Law–Johnson-Noise (KLJN) Secure Key Exchange System

  Publikacja

  • L. B. Kish
  • Z. Gingl
  • R. Mingesz
  • J. Smulko

  - FLUCTUATION AND NOISE LETTERS - Rok 2015

  A recent paper by Gunn–Allison–Abbott (GAA) [L. J. Gunn et al., Scientific Reports 4 (2014) 6461] argued that the Kirchhoff-law–Johnson-noise (KLJN) secure key exchange system could experience a severe information leak. Here we refute their results and demonstrate that GAA’s arguments ensue from a serious design flaw in their system. Specifically, an attenuator broke the single Kirchhoff-loop into two coupled loops, which is an...

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• Dispersive solid-phase extraction using multi-walled carbon nanotubes combined with liquid chromatography–mass spectrometry for the analysis of β-blockers: Experimental and theoretical studies

  Publikacja

  • A. Jakubus
  • M. Gromelski
  • K. Jagiello
  • T. Puzyn
  • P. Stepnowski
  • M. Paszkiewicz

  - Microchemical Journal - Rok 2019

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• Experimental Investigation of the Thermal Performance of a Wickless Heat Pipe Operating with Different Fluids: Water, Ethanol, and SES36. Analysis of Influences of Instability Processes at Working Operation Parameters

  Publikacja

  • R. Andrzejczyk

  - ENERGIES - Rok 2018

  In this study, the influences of different parameters on performance of a wickless heat pipe have been presented. Experiments have been carried out for an input power range from 50 W to 300 W, constant cooling water mass flow rate of 0.01 kg/s, and constant temperature at the inlet to condenser of 10 C. Three working fluids have been tested: water, ethanol, and SES36 (1,1,1,3,3-Pentafluorobutane) with different filling ratios (0.32,...

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• Uncertainty Quantification in Experimental Structural Dynamics Identification of Composite Material Structures

  Publikacja

  • M. Łuczak
  • B. Peeters
  • M. Kahsin
  • S. Manzato
  • K. Branner

  - Rok 2014

  Composite materials are widely used in manufacture of aerospace and wind energy structural components. These load carrying structures are subjected to dynamic time-varying loading conditions. Robust structural dynamics identification procedure impose tight constraints on the quality of modal models estimates obtained from vibration experiments. Modal testing results are influenced by numerous factors introducing uncertainty to...

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• Identification of dynamic parameters in the context of diagnostics of steel tank with different level of liquid.

  Publikacja

  • M. Rucka
  • M. Zielińska

  - Diagnostyka - Rok 2015

  The paper presents an experimental study to identify the dynamic parameters of a water-filled tank model. The experimental modal analysis approach involving the excitation at one point of the structure and acquisition of vibra tions at selected points distri buted over the tank surface allowed to determine the resonance frequencies, mode shapes and damping ratios. The main aim of the research was to examine the influence of...

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• Proceedings of the 9th International Conference on Structural Dynamics, EURODYN 2014

  Publikacja

  • M. Kahsin

  - Rok 2014

  Since offshore wind turbine supporting structures are subjected to dynamic environments with time-varying loading conditions, it is important to model their dynamic behavior and validate these models by means of vibrational experiments. In this paper assessment of dynamical state of the structure is investigated by means of both: numerical modeling, and experimental modal analysis. In experimental modal analysis, capturing the...

• NUMERICAL MODEL QUALITY ASSESSMENT OF OFFSHORE WIND TURBINE SUPPORTING STRUCTURE BASED ON EXPERIMENTAL DATA

  Publikacja

  • M. Kahsin
  • M. Łuczak

  - Rok 2015

  As a structure degrades some changes in its dynamical behavior can be observed, and inversely, observation and evaluation of these dynamical changes of the structure can provide information of structural state of the object. Testing of the real structure, besides of being costly, can cover only limited working states. It is particularly considerable in case of hardly accessible, and randomly/severely dynamically loaded offshore...

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• Modal parameters identification with Particle Swarm Optimization

  Publikacja

  • M. Galewski

  - Key Engineering Materials - Rok 2014

  The paper presents method of the modal parameters identification based on the Particle Swarm Optimization (PSO) algorithm [1]. The basic PSO algorithm is modified in order to achieve fast convergence and low estimation error of identified parameters values. The procedure of identification as well as algorithm modifications are presented and some simple examples for the SISO systems are provided. Results are compared with the results...

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• The Effect of University Campuses on the Modal Split of Polish Cities

  Publikacja

  • R. Okraszewska
  • A. Romanowska
  • K. Jamroz

  - Rok 2017

  The article considers the effect Polish public universities have on the characteristics of urban traffic. The article describes how the public university community has changed over 25 years and its share in the urban population. The characteristics of the modal split in Polish university towns is given based on selected cases. The relation between the share of transport modes in the modal split and the size of towns or university...

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• Modal diagnostics of civil engineering structures.

  Publikacja

  • K. Wilde

  - Rok 2008

  Książka dotyczy zastosowania analizy modalnej do diagnostyki konstrukcji budowlanych.

• Experimental determination of dynamic properties of cylindrical steel tank model filled with liquid

  Publikacja

  • D. Burkacki
  • R. Jankowski
  • T. Falborski

  - Technology and Art - Rok 2012

  In technical branches, such as chemical or petroleum industries, cylindrical steel tanks are essential structures used for storage of liquid products. Any failure might have disastrous consequences, therefore their safety and reliability is essential. The aim of the present paper is to show the results of the experimental study which has been conducted on a scaled model of a real tank used in Poland. The investigation was carried...

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• The dynamic performance analysis of the Micro-turbine's rotor supparted on slide and roling element bearings

  Publikacja

  • J. Kiciński
  • G. Żywica
  • P. Bagiński

  - Rok 2011

  This article presents the results of investigations of dynamic characteristics of a small-dimension rotor with slide and rolling element bearings. The object of investigations was the rotor-bearing system designed for the ORC based low-power steam micro-turbine. The investigations were performed using MESWIR series programs, as well as commercial FEA software ABAQUS and MADYN 2000. The results of modal analysis of the micro-rotor...

• Study on applicability of two modal identification techniques in irrelevant cases

  Publikacja

  • A. Tomaszewska
  • M. Szafrański

  - Archives of Civil and Mechanical Engineering - Rok 2020

  Study on applicability of two modal identification techniques in irrelevant cases is made in this paper. The following techniques are considered: Peak Picking based on correlation analysis (PP-CA), dedicated for ambient vibrations and Eigensystem Realization Algorithm (ERA), formulated for free decay vibrations investigation. Irrelevant cases are found when analyzed signals are different than recommended to a given technique. The...

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• Application of Illuminating Modes concept in modal expansion of elliptical resonator

  Publikacja

  • M. Pergoł
  • W. Zieniutycz

  - Rok 2013

  In the paper an IlluminatingModes (IM) approach as an extension of Spectral Domain Approach (SDA) is presented. IM concept is applied to the case of open microstrip planar elliptical resonator. A modal expansion of currents induced in the structures during illuminating them by a single plane wave is the novelty of the method. As an example of application of the method, we present the results obtained by an examination of two resonators...

• Numerical Modelling of Structures with Uncertainties

  Publikacja

  • M. Kahsin

  - Polish Maritime Research - Rok 2017

  The nature of environmental interactions, as well as large dimensions and complex structure of marine offshore objects, make designing, building and operation of these objects a great challenge. This is the reason why a vast majority of investment cases of this type include structural analysis, performed using scaled laboratory models and complemented by extended computer simulations. The present paper focuses on FEM modelling...

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• Spectrum-based modal parameters identification with Particle Swarm Optimization

  Publikacja

  • M. Galewski

  - MECHATRONICS - Rok 2016

  The paper presents the new method of the natural frequencies and damping identification based on the Artificial Intelligence (AI) Particle Swarm Optimization (PSO) algorithm. The identification is performed in the frequency domain. The algorithm performs two PSO-based steps and introduces some modifications in order to achieve quick convergence and low estimation error of the identified parameters’ values for multi-mode systems....

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• Experimental and Numerical Study on Dynamics of Two Footbridges with Different Shapes of Girders

  Publikacja

  • A. Banaś
  • R. Jankowski

  - Applied Sciences-Basel - Rok 2020

  The paper presents the experimental and numerical results of the dynamic system identification and verification of the behavior of two footbridges in Poland. The experimental part of the study involved vibration testing under different scenarios of human-induced load, impulse load, and excitations induced by vibration exciter. Based on the results obtained, the identification of dynamic parameters of the footbridges was performed...

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• SPECTRAL-BASED MODAL PARAMETERS IDENTIFICATION WITH MULTIPLE PARTICLE SWARMS OPTIMIZATION

  Publikacja

  • A. Orzechowski
  • M. Galewski

  - Rok 2017

  The paper presents usage of a Particle Swarm Optimization [1] based algorithm for spectral-based modal parameters identification. The main algorithm consists of two groups of swarms, namely, scouts and helpers. For the first group additional penalizing process is provided to force separation of scouting swarms in frequency space. The swarms have an ability to communicate with each other. At first stage, each swarm focuses on a...

• An adaptation of modal control to vibration control of industrial robots

  Publikacja

  • K. J. Kaliński
  • K. Jasiński

  - Rok 2006

  Rozważania dotyczą drgań niestacjonarnego układu nośnego manipulatora IRb-6. Do nadzorowania drgań zastosowano algorytm sterowania modalnego przy energetycznym wskaźniku jakości. Celem proponowanego algorytmu jest minimalizacja poziomu drgań końcówki manipulatora, co spowoduje zwiększenie obciążeń dopuszczalnych współczesnych linii zrobotyzowanych, jak również poprawę dokładności oraz powtarzalności pozycjonowania robota.

• Modal structure design in refractive capillary optical fibers

  Publikacja

  • R. Romaniuk
  • R. S. Romaniuk

  - Photonics Letters of Poland - Rok 2010

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• On the broadband behaviour of planar elliptical dipole-modal approach

  Publikacja

  • W. Zieniutycz
  • M. Pergoł

  - Rok 2018

  Broadband behavior of planar elliptical dipole structure is analyzed using Illuminatin Modes (IM) approach. The current on patch has been expanded in series of eigenfunctions in form of Mathieu radial and angular functions. The frequency behavior of current distributions and related powers have been discussed to explain the mechanism of broadband operation of the dipole. Different behavior of radiations patterns in wide frequency...

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• An Experimentally Aided Operational Virtual Prototyping to Obtain the Best Spindle Speed during Face Milling of Large-Size Structures

  Publikacja

  • K. J. Kaliński
  • M. Galewski
  • M. Mazur
  • N. Stawicka-Morawska

  - Materials - Rok 2021

  Abstract: The paper presents an original method concerning the problem of vibration reduction in the general case while milling large-size and geometrically complex details with the use of an innovative approach to the selection of spindle speed. A computational model is obtained by applying the so-called operational approach to identify the parameters of the workpiece modal model. Thanks to the experimental modal analysis results,...

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• Dynamic analysis of the railway bridge span under moving loads

  Publikacja

  • M. Szafrański

  - Roads and Bridges - Drogi i Mosty - Rok 2018

  The first part of this paper provides a review of the state of knowledge of the dynamic behaviour of railway bridges under moving loads. Particular attention is paid to developments in modelling railway bridge loading and dynamic vehicle-span (structure) interaction. The most important aspects determining the advancements in this area of knowledge are identified. The contemporary techniques for defining bridge span finite element...

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• Nonlinear Modeling in Time Domain Numerical Analysis of Stringed Instrument Dynamics

  Publikacja

  • P. M. Bielski
  • M. Kujawa

  - Rok 2017

  Musical instruments are very various in terms of sound quality with their timbre shaped by materials and geometry. Materials' impact is commonly treated as dominant one by musicians, while it is unclear whether it is true or not. The research proposed in the study focuses on determining influence of both these factors on sound quality based on their impact on harmonic composition. Numerical approach has been chosen to allowed independent...

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• Exact modal absorbing boundary condition for waveguide simulations - discrete Green's function approach

  Publikacja

  • M. Wiktor
  • T. Stefański

  - Rok 2014

  A modal absorbing boundary condition (ABC) based on the discrete Green's function (DGF) is introduced and applied for termination of waveguides simulated by means of the finite-difference time-domain (FDTD) method. The differences between the developed approach and implementations already demonstrated in the literature are presented. By applying DGF, a consistent theoretical approach to modal ABC in the FDTD method is obtained....

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