Wyniki wyszukiwania dla: WAVE ENERGY CONVERTER

• THE METHOD OF ENERGY-EFFICIENCY INVESTIGATIONS OF THE NEWLY PRODUCED MARINE FUELS THROUGH AN APPLICATION OF THE LABORATORY DIESEL ENGINE

  Publikacja

  • Z. Korczewski

  - New Trends in Production Engineering - Rok 2018

  The article deals with one of the scientific issue solved within frames of the research project financed by Voivodeship Fund for Environmental Protection and Water Management in Gdansk, namely, in particular, the method of energy investigations of the self-ignition engine in conditions of its supply with a non-standard (modified) marine fuel. The representative results of engine tests worked out on the especially built laboratory...

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• Dual-band Millimetre Wave MIMO Antenna with Reduced Mutual Coupling Based on Optimized Parasitic Structure and Ground Modification

  Publikacja

  • B. Esmail
  • D. Isleifson
  • S. Kozieł

  - Scientific Reports - Rok 2024

  In this study, a high-isolation dual-band (28/38 GHz) multiple-input–multiple-output (MIMO) antenna for 5G millimeter-wave applications is presented. The antenna consists of two interconnected patches. The primary patch is connected to the inset feed, while the secondary patch is arc-shaped and positioned over the main patch, opposite to the feed. Both patches function in the lower 28 GHz band, while the primary patch is accountable...

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• Analyzing Wind Energy Potential Using Efficient Global Optimization: A Case Study for the City Gdańsk in Poland

  Publikacja

  • O. Aydin
  • B. Igliński
  • K. Krukowski
  • M. Siemiński

  - ENERGIES - Rok 2022

  Wind energy (WE), which is one of the renewable energy (RE) sources for generating electricity, has been making a significant contribution to obtaining clean and green energy in recent years. Fitting an appropriate statistical distribution to the wind speed (WS) data is crucial in analyzing and estimating WE potential. Once the best suitable statistical distribution for WS data is determined, WE potential and potential yield could...

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• Evaluation of adhesive forces and the specific surface energy of zirconia stabilized by yttria with alumina additions ceramic by AFM method

  Publikacja

  • T. Kuznetsova
  • M. H. Ghaemi
  • T. Zubar
  • S. Chizhik
  • A. Zykova
  • S. Lobach
  • S. Sayenko

  - Rok 2016

  The adhesive forces and the specific surface energy of ceramic material surfaces are very important for further tribological and biomedical applications of ceramics. Partially stabilized zirconia (zirconium oxide) is popular for manufacturing various medical products. ZrO2 stabilized by Y2O3 with additions of 5 wt% alumina was produced by slip casting method with a subsequent sintering. Structure and chemical composition of ceramic...

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• Exergy and Energy Analyses of Microwave Dryer for Cantaloupe Slice and Prediction of Thermodynamic Parameters Using ANN and ANFIS Algorithms

  Publikacja

  • S. Zadhossein
  • Y. Abbaspour-Gilandeh
  • M. Kaveh
  • M. Szymanek
  • E. Khalife
  • O. D. Samuel
  • M. Amiri
  • J. Dziwulski

  - ENERGIES - Rok 2021

  The study targeted towards drying of cantaloupe slices with various thicknesses in a microwave dryer. The experiments were carried out at three microwave powers of 180, 360, and 540 W and three thicknesses of 2, 4, and 6 mm for cantaloupe drying, and the weight variations were determined. Artificial neural networks (ANN) and adaptive neuro-fuzzy inference systems (ANFIS) were exploited to investigate energy and exergy indices of...

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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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• A universal NDT method for examination of low energy impact damage in CFRP with the use of TLC film

  Publikacja

  • G. Strugała
  • M. Klugmann
  • M. Landowski
  • M. Szkodo
  • D. Mikielewicz

  - Nondestructive Testing and Evaluation - Rok 2018

  The article presents an attempt to use a sheet of laminated thermochromic liquid crystal film (TLC film) for non-destructive testing of the impact damage (energy values: 1J, 2J, 3J and 4J) in carbon fibre-reinforced polymer (CFRP). This is a new, alternative NDT approach based on the thermo-optical effect. The main advantages of this method are a) the low cost of TLC film, b) the low cost of recording devices due to the usage of...

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• The Rule-Based Model of Negentropy for Increasing the Energy Efficiency of the City’s Digital Transformation Processes into a Smart City

  Publikacja

  • C. Orłowski
  • P. Cofta
  • A. Orłowski

  - ENERGIES - Rok 2022

  The aim of the article is to build a rule-based model (RMFDN) for increasing the energy efficiency of Smart Cities’ digital transformation processes. The problem that arises during the implementation of digital transformation processes concerns the measures that should be assigned to estimate the duration of the digital transformation. Previous studies of digital transformation have been based on the analysis of design processes...

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• The impact of the overhead line's power supply system spatial differentiation on the energy consumption of trolleybus transport: planning and economic aspects

  Publikacja

  • M. Bartłomiejczyk
  • M. Połom

  - Transport - Rok 2017

  Nowadays the issue of electric energy saving in public transport is becoming a key area of interest, which is connected both with a growth in environmental awareness of the society and an increase in the prices of fuel and electricity. It can be achieved by reducing of the transmission losses in supply system or by the improving of the usage of the regenerative breaking. The spatial differentiation of the energy supply system of...

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• Alternative Energy: Photovoltaic Modules and Systems

  Publikacja

  • E. Klugmann-Radziemska

  - Rok 2012

  ...

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• Alternative Energy: Photovoltaic Solar Cells

  Publikacja

  • E. Klugmann-Radziemska

  - Rok 2012

  ...

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• Hydrogen generation using solar energy

  Publikacja

  • M. Nischk
  • M. Solski

  - Rok 2011

  Wodór jest uważany za alternatywne i odnawialne źródło energii. Bezpośrednie wykorzystanie światła słonecznego do fotokatalitycznego lub fotoelektrochemicznego rozkładu wody może zapewnić w przyszłości ekonomicznie uzasadnione, alternatywne źródło wodoru. W pierwszym etapie naszych badań został zaprojektowany i zbudowany hybrydowy, fotowoltaiczno-elektrochemiczny układ, dokonujący konwersji energii promieniowania słonecznego na...

• Hydrogen generation using solar energy

  Publikacja

  • M. Nischk
  • M. Solski

  - Rok 2011

  Wodór jest uważany za alternatywne i odnawialne źródło energii. Bezpośrednie wykorzystanie światła słonecznego do fotokatalitycznego lub fotoelektrochemicznego rozkładu wody może zapewnić w przyszłości ekonomicznie uzasadnione, alternatywne źródło wodoru. W wystąpieniu przedstawione zostały wyniki dotychczasowych prac związanych z hybrydową, fotowoltaiczno-elektrochemiczną instalacją do rozkładu wody oraz omówione zostały kierunki...

• Threat intelligence platform for the energy sector

  Publikacja

  • R. Leszczyna
  • M. Wróbel

  - SOFTWARE-PRACTICE & EXPERIENCE - Rok 2019

  In recent years, critical infrastructures and power systems in particular have been subjected to sophisticated cyberthreats, including targeted attacks and advanced persistent threats. A promising response to this challenging situation is building up enhanced threat intelligence that interlinks information sharing and fine-grained situation awareness. In this paper a framework which integrates all levels of threat intelligence...

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• Nanomaterials for Environmental Purification and Energy Conversion

  Publikacja

  • E. Kowalska
  • A. B. Markowska-Szczupak
  • M. Janczarek

  - Catalysts - Rok 2019

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• Energy policy and the role of bioenergy in Poland

  Publikacja

  • J. Buriak
  • P. Bućko
  • M. Pisarek
  • Ł. Jaworski
  • A. Oniszyk-Popławska
  • K. Ericsson
  • L. J. Nilsson

  - Rok 2005

  Przedstawiono sytuacje energetyczną kraju. Omówiono poszczególne sektory wytwarzania energii oraz zapotrzebowania na energię i paliwa. Omówiono przekształcenia sektorów energetycznych w Polsce na przestrzeni lat 1990-2002. Na tym tle przedstawiono techniczne, ekonomiczne, społeczne i prawne aspekty rozwoju energetyki źródeł odnawialnych a w szczególności opartych o bioenergię. Przedstawiono wnioski dla Polski płynące z dotychczasowych...

• The lows of thermodynamics: cell energy transfer

  Publikacja

  • J. Mikielewicz
  • J. Stąsiek
  • M. Collins

  - Rok 2005

  W pracy przedstawiono zasady termodynamiki i wymiany ciepła w organizmach żywych i urządzeniach technicznych. Przedstawiono zasady stosowania praw fizycznych związanych z konwersją energii w organizmach żywych.

• Photovoltaic energy systems - recycling or utilization?

  Publikacja

  • E. Klugmann-Radziemska
  • P. Ostrowski

  - Rok 2008

  W ostatnich latach obserwuje się znaczny wzrost produkowanej ilości modułów fotowoltaicznych (do 40% rocznie), przy czym 90% światowej produkcji ogniw do zastosowań naziemnych stanowią ogniwa z krystalicznego krzemu. Wskutek tak znacznego wzrostu produkcji pojawił się problem zaopatrzenia producentów w odpowiednią ilość krzemu odpowiedniej jakości. Dodatkowo za parę lat trzeba będzie dokonać wymiany modułów, pracujących od lat...

• Green energy in municipal planning documents

  Publikacja

  • A. Bazan-Krzywoszańska
  • M. Skiba
  • M. Mrówczyńska
  • M. Sztubecka
  • D. Bazuń
  • M. Kwiatkowski

  - E3S Web of Conferences - Rok 2018

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• Intrinsic energy resolution of NaI(Tl)

  Publikacja

  • M. Moszyński
  • J. Zalipska
  • M. Balcerzyk
  • M. Kapusta
  • W. Mengesha
  • J. Valentine
  • M. Balcerzyk

  - NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT - Rok 2002

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• Graphene and Its Derivatives for Energy Storage

  Publikacja

  • M. Aleksandrzak
  • E. Mijowska

  - Rok 2015

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• Storing energy from renewable sources

  Publikacja

  • W. Lewandowski

  - Rinok Instalacij. Tieplotiechnika Santiechnika Gazopostaczania - Rok 2006

  Omówiono metody, urządzenia i sposoby magazynowania energii mechanicznej, elektrycznej, cieplnej i chemicznej z uwzględnieniem energii ze źródeł odnawialnych.

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• GaAs-Si interfacial energy determination

  Publikacja

  • A. Zdyb
  • D. Szymczuk
  • J. M. Olchowik
  • W. Sadowski
  • J. Mucha
  • K. Zabielski
  • M. Mucha

  - Molecular Physics Reports - Rok 2002

  Bazując na półempirycznym modelu wiązań kowalencyjnych w krzemie wyznaczono energie międzypowierzchni GaAs-Si. Obliczona energia międzypowierzchni GaAs-Si zależna jest od orientacji podłoża Si. Minimalna energia międzypowierzchniowa wyznacza odpowiednią konfigurację atomów w pobliżu powierzchni, która określa optymalne warunki heteroepitaksji GaAs na podłożach Si.

• Energy losses in hydrostatic drive:Drive investigation method compatible with diagram of power increase opposite to the direction of power flow

  Publikacja

  • Z. Paszota

  - Rok 2016

  Energy losses and efficiency of drive motor must be presented as functions of physical quantities independent of losses in the motor. Such quantities are speed and load required by the driven device, changing in the drive operating field. Speed and load decide of the useful power and, in differentiated way, of kinds and values of losses in the motor. But energy losses and efficiency of drive motors are evaluated as functions of...

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• Analyzing energy/performance trade-offs with power capping for parallel applications on modern multi and many core processors

  Publikacja

  • A. Krzywaniak
  • J. Proficz
  • P. Czarnul

  - Annals of Computer Science and Information Systems - Rok 2018

  In the paper we present extensive results from analyzing energy/performance trade-offs with power capping observed on four different modern CPUs, for three different parallel applications such as 2D heat distribution, numerical integration and Fast Fourier Transform. The CPU tested represent both multi-core type CPUs such as Intel⃝R Xeon⃝R E5, desktop and mobile i7 as well as many-core Intel⃝R Xeon PhiTM x200 but also server, desktop...

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• PRZEGLĄD METOD POMIARU MAŁYCH ENERGII DLA OCENY UKŁADÓW „ENERGY-HARVESTING” I SYSTEMÓW MIKROMOCOWYCH

  Publikacja

  • D. Palmowski
  • G. Lentka
  • A. Hojka

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Rok 2016

  W artykule omówiono trzy metody pomiaru małych energii dla oceny układów zasilania typu „energy-harvesting” i systemów mikromocowych. Opisano klasyczną metodę techniczną, jak i estymację energii zarówno poprzez pomiar ładunku oraz wykorzystanie równoważenia ładunku. Niezależnie od metody pomiaru, zwrócono uwagę na specyficzny, impulsowy i nieregularny charakter poboru energii przez systemy mikromocowe oraz podobny impulsowy charakter...

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• A novel dual-band rectifier circuit with enhanced bandwidth for RF energy harvesting applications

  Publikacja

  • T. Karataev
  • A. Bekasiewicz
  • S. Kozieł

  - Rok 2018

  In recent years, a rapid development of low-power sensor networks, enabling machine-to-machine communication in applications such as environmental monitoring, has been observed. Contemporary sensors are normally supplied by an external power source, typically in a form of a battery, which limits their lifespan and increases the maintenance costs. This problem can be addressed by harvesting and converting ambient RF energy into...

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• Prediction of energy consumption and evaluation of affecting factors in a full-scale WWTP using a machine learning approach

  Publikacja

  • F. Bagherzadeh
  • A. Shojaei Nouri
  • M. J. Mehrani
  • S. Thennadil

  - PROCESS SAFETY AND ENVIRONMENTAL PROTECTION - Rok 2021

  Treatment of municipal wastewater to meet the stringent effluent quality standards is an energy-intensive process and the main contributor to the costs of wastewater treatment plants (WWTPs). Analysis and prediction of energy consumption (EC) are essential in designing and operating sustainable energy-saving WWTPs. In this study, the effect of wastewater, hydraulic, and climate-based parameters on the daily consumption of EC by...

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• Analysis of electricity generation variability in 2019 with special consideration of electrical energy generation from wind sources.

  Publikacja

  • S. Kruk-Gotzman
  • P. Ziółkowski
  • J. Badur

  - Rok 2020

  This article presents issues related to the broadly understood development of wind energy. The state of the art of wind energy in the world has been discussed. This paper also shows issues related to factors affecting the development of renewable energy sources and their impact on the natural environment on the basis of available research. The focus is, however, on the critical analysis of phenomena in the data of the Transmission...

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• Integrated algorithm for selecting the location and control of energy storage units to improve the voltage level in distribution grids

  Publikacja

  • A. Szultka
  • S. Szultka
  • S. Czapp
  • Z. Lubośny
  • R. Małkowski

  - ENERGIES - Rok 2020

  This paper refers to the issue that mainly appears in distribution grids, where renewable energy sources (RES) are widely installed. In such grids, one of the main problems is the coordination of energy production time with demand time, especially if photovoltaic energy sources are present. To face this problem, battery energy storage units (ESU) can be installed. In recent years, more and more attention has been paid to optimizing...

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• Crystal structure and low-energy Einstein mode in ErV2Al20 intermetallic cage compound

  Publikacja

  • M. J. Winiarski
  • T. Klimczuk

  - JOURNAL OF SOLID STATE CHEMISTRY - Rok 2017

  Single crystals of a new ternary aluminide ErV2Al20 were grown using a self-flux method. The crystal structure was determined by powder X-ray diffraction measurements and Rietveld refinement, and physical properties were studied by means of electrical resistivity, magnetic susceptibility and specific heat measurements. These measurements reveal that ErV2Al20 is a Curie-Weiss paramagnet down to 1.95 K with an effective magnetic...

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• Highly Integrable Planar-structured Printed Circularly Polarized Antenna for Emerging Wideband Internet of Things Applications in the Millimeter-Wave Band

  Publikacja

  • U. Ubaid
  • S. Kozieł
  • A. Pietrenko-Dąbrowska

  - Scientific Reports - Rok 2024

  This paper proposes a numerically and experimentally validated printed wideband antenna with a planar geometry for Internet of Things (IoT) applications. This design tackles the challenges associated with deploying IoT sensors in remote areas or across extensive geographical regions. The proposed design exploits a coplanar-waveguide-fed modified microstrip line monopole for excitation of circularly polarized waves radiating in...

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• Hydrogen Production from Energy Poplar Preceded by MEA Pre-Treatment and Enzymatic Hydrolysis

  Publikacja

  • K. Kucharska
  • R. Łukajtis
  • E. Słupek
  • H. Cieśliński
  • P. Rybarczyk
  • M. A. Kamiński

  - MOLECULES - Rok 2018

  The need to pre-treat lignocellulosic biomass prior to dark fermentation results primarily from the composition of lignocellulose because lignin hinders the processing of hard wood towards useful products. Hence, in this work a two-step approach for the pre-treatment of energy poplar, including alkaline pre-treatment and enzymatic saccharification followed by fermentation has been studied. Monoethanolamine (MEA) was used as the...

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• Thermochemical Conversion of Biomass and Municipal Waste into Useful Energy Using Advanced HiTAG/HiTSG Technology

  Publikacja

  • J. Stąsiek
  • M. Szkodo

  - ENERGIES - Rok 2020

  An advanced thermal conversion system involving high-temperature gasification of biomass and municipal waste into biofuel, syngas or hydrogen-rich gas is presented in this paper. The decomposition of solid biomass and wastes by gasification is carried out experimentally with a modern and innovative regenerator and updraft continuous gasifier, among others. A ceramic high-cycle regenerator provides extra energy for the thermal conversion...

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• Forecasting energy consumption and carbon dioxide emission of Vietnam by prognostic models based on explainable machine learning and time series

  Publikacja

  • T. T. Le
  • P. Sharma
  • S. M. Osman
  • M. Dzida
  • P. Q. P. Nguyen
  • M. H. Tran
  • D. N. Cao
  • V. D. Tran

  - Clean Technologies and Environmental Policy - Rok 2024

  This study assessed the usefulness of algorithms in estimating energy consumption and carbon dioxide emissions in Viet- nam, in which the training dataset was used to train the models linear regression, random forest, XGBoost, and AdaBoost, allowing them to comprehend the patterns and relationships between population, GDP, and carbon dioxide emissions, energy consumption. The results revealed that random forest, XGBoost, and AdaBoost...

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• Cross-border transmission line configuration influence on the electrical power and energy billing process

  Publikacja

  • K. Dobrzyński
  • J. Klucznik
  • Z. Lubośny
  • M. Jaskólski
  • P. Bućko

  - Rok 2018

  In 2015 a connection between the Polish and Lithuanian power systems become fully operational. The connection consists of a 400 kV double circuit transmission line and a back-to-back HVDC substation located on the Lithuanian side. A magnetic couplings between the circuits of the transmission line cause that during power transmission a different values of active power losses are observed in both circuits. This situation may cause...

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• Experimental Research on the Energy Efficiency of a Parallel Hybrid Drive for an Inland Ship

  Publikacja

  • W. Litwin
  • W. Leśniewski
  • D. Piątek
  • K. Niklas

  - ENERGIES - Rok 2019

  The growing requirements for limiting the negative impact of all modes of transport on the natural environment mean that clean technologies are becoming more and more important. The global trend of e-mobility also applies to sea and inland water transport. This article presents the results of experimental tests carried out on a life-size, parallel diesel-electric hybrid propulsion system. The eciency of the propulsion system was...

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• MARKAL LONG-TERM POWER GENERATION SCENARIOS FOR POLAND: INCREASING THE SHARE OF RENEWABLE ENERGY SOURCES BY 2040

  Publikacja

  • M. Jaskólski
  • P. Bućko

  - Rok 2015

  In this paper, renewable energy sources (RES) support mechanisms in Poland was presented with perspectives of proposed support system modifications, discussed in the project of Renewable Energy Act. In addition, MARKAL model of RES support mechanism was presented, taking into account technology-specific multiplication factors. Two model runs with emission trading system in place and two additional runs without emission trade were...

• ENERGY AND EMISSION QUALITY RANKING OF NEWLY PRODUCED LOW-SULPHUR MARINE FUEL

  Publikacja

  • Z. Korczewski

  - Polish Maritime Research - Rok 2022

  The article describes the methodology of engine tests on new types of low-sulphur marine fuels in laboratory conditions in order to conduct a comprehensive assessment of their suitability for powering full-size marine engines. The innovativeness of the proposed solution consists of adapting the laboratory Diesel Engine Test Bed to carry out experimental tests using residual and alternative fuels so that it is possible to imitate...

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• A Review of Recent Advances in Human-Motion Energy Harvesting Nanogenerators, Self-Powering Smart Sensors and Self-Charging Electronics

  Publikacja

  • J. Gołąbek
  • M. Strankowski

  - SENSORS - Rok 2024

  In recent years, portable and wearable personal electronic devices have rapidly developed with increasing mass production and rising energy consumption, creating an energy crisis. Using batteries and supercapacitors with limited lifespans and environmental hazards drives the need to find new, environmentally friendly, and renewable sources. One idea is to harness the energy of human motion and convert it into electrical energy...

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• MARKAL long-term power generation scenarios for Poland: Increasing the share of renewable energy sources by 2040

  Publikacja

  • M. Jaskólski
  • P. Bućko

  - Rynek Energii - Rok 2015

  In this paper, renewable energy sources (RES) support mechanisms in Poland was presented with perspec-tives of proposed support system modifications, discussed in the project of Renewable Energy Act. In ad-dition, MARKAL model of RES support mechanism was presented, taking into account technology-specific multiplication factors. Two model runs with emission trading system in place and two additional runs without emission trade...

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• A semiempirical model for low energy electron–atom transport cross sections: The case of noble gases

  Publikacja

  • F. Arretche
  • E. Popovicz Seidel
  • W. Tenfen

  - JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA - Rok 2024

  A semiempirical approach to describe low energy electron–atom transport cross sections of easy implementation and reproduction is presented. The heart of the model is an energy independent two-parameter potential that was adjusted to reproduce the accurate total cross sections for He, Ne, Ar and Kr, measured with a threshold photoelectron source technique from meV up to 20 eV. Once the potential was conceived, the model was validated...

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• A 100 kW 1.2 kV 20 kHz DC-DC converter prototype based on the Dual Active Bridge topology

  Publikacja

  • T. Lagier
  • L. Chedot
  • F. Ghossein
  • B. Lefebvre
  • P. Dworakowski
  • M. Mermet-Guyennet
  • C. Buttay

  - Rok 2018

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• Feasibility study of inductor coupling in three-level neutral-point-clamped quasi-Z-source DC/AC converter

  Publikacja

  • J. Zakis
  • O. Husev
  • R. Strzelecki

  - Rok 2014

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• Continuous wave sonar with hyperbolic frequency modulation keyed by pseudo-random sequence

  Publikacja

  • A. Jedel
  • J. Marszal
  • R. Salamon

  - HYDROACOUSTICS - Rok 2016

  A CW FM type sounding signal is used in the classical solution of silent sonar. While the signal provides a relatively simple implementation of digital signal processing, and ensures good detection conditions, unfortunately, in the presence of the Doppler effect, distance measurement results tend to be wrong. This is due to the fact that the received signal’s instantaneous frequency value is dependent both on the distance to the...

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• Experimental and numerical studies of guided wave damage detection in bars with structural discontinuities

  Publikacja

  • M. Rucka

  - ARCHIVE OF APPLIED MECHANICS - Rok 2010

  Praca dotyczy analizy propagacji fal podłużnych i poprzecznych w elementach prętowych z nieciągłościami strukturalnymi. Symulacje numeryczne przeprowadzone przy zastosowaniu metody elementów spektralnych zostały porównane z wynikami badań eksperymentalnych dla pręta w stanie nienaruszonym oraz dla prętów z rysą, spawem oraz dodatkową masą.

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• Guided wave propagation in structures. Modelling, experimental studies and application to damage detection

  Publikacja

  • M. Rucka

  - Rok 2011

  Celem niniejszej pracy są eksperymentalne i numeryczne analizy propagacji prowadzonych fal sprężystych w stalowych konstrukcjach prętowych, belkowych, ramowych, tarczowych i płytowych. W szczególności praca poświęcona jest: (a) modelowaniu propagacji fal z uwzględnieniem zjawiska dyspersji; (b) budowie modeli obliczeniowych w formalizmie metody elementów spektralnych; (c) eksperymentalnej weryfikacji zaproponowanych modeli; (d)...

• Damage detection of a T-shaped panel by wave propagation analysis in the plane stress

  Publikacja

  • M. Rucka
  • W. Witkowski
  • J. Chróścielewski
  • K. Wilde

  - Archives of Civil Engineering - Rok 2012

  W pracy zaprezentowano podejście obliczeniowe do analizy propagacji fal w płaskim stanie naprężenia. Problem brzegowo-początkowy podlega przestrzennej aproksymacji z użyciem wielowęzłowych, izoparametrycznych, czworobocznych elementów klasy C0. Macierze elementowe są całkowane numerycznie za pomocą kwadratury Gauss-Legendre-Lobatto. Aproksymację w dziedzinie czasu wykonano za pomocą algorytmu Newmarka. Symulacje numeryczne przeprowadzono...

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• Assessment of flexural beam behaviour theories used for dynamics and wave propagation problems

  Publikacja

  • A. Żak
  • M. Krawczuk

  - JOURNAL OF SOUND AND VIBRATION - Rok 2012

  W pracy przedstawiono i porównano teorie belek zginanych począwszych od teorii elementarnych, aż do teorii wyższych rzędów. Przedstawiono krzywe dyspersi dla poszczególnych teorii i na ich podstawione oszacowano zakres stosowalności danej teorii.

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• Application of Pierson-Moskowitz wave spectrum to solution differential equations of multihull vessel

  Publikacja

  • A. Królicka-Gałązka
  • K. Trębacki

  - Logistyka - Rok 2011

  Motion of a dynamic system can be generated by different external or internal factors. At mathematical modelling external excitation factors of the most significant effect on the system, are selected. Such external factors are usually called excitations. Response of the system to given excitations is mathematically characterized by a definite transformation called operator of a system. For a broad class of dynamic systems the...

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