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 : New Frontiers - 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...

• 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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• 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.

• 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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• 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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• 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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