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Tytuł:
A Coupled Smoothed Finite Element-Boundary Element Method for Structural-Acoustic Analysis of Shell
Autorzy:
Tian, W.
Yao, L.
Li, L.
Powiązania:
https://bibliotekanauki.pl/articles/177260.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
SFEM
smoothed finite element method
FEM
finite element method
BEM
boundary element method
structural-acoustic analysis
Opis:
Nowadays, the finite element method (FEM) – boundary element method (BEM) is used to predict the performance of structural-acoustic problem, i.e. the frequency response analysis, modal analysis. The accuracy of conventional FEM/BEM for structural-acoustic problems strongly depends on the size of the mesh, element quality, etc. As element size gets greater and distortion gets severer, the deviation of high frequency problem is also clear. In order to improve the accuracy of structural-acoustic problem, a smoothed finite-element/boundary-element coupling procedure (SFEM/BEM) is extended to analyze the structural-acoustic problem consisting of a shell structure interacting with the cavity in this paper, in which the SFEM and boundary element method (BEM) models are used to simulate the structure and the fluid, respectively. The governing equations of the structural-acoustic problems are established by coupling the SFEM for the structure and the BEM for the fluid. The solutions of SFEM are often found to be much more accurate than those of the FEM model. Based on its attractive features, it was decided in the present work to extend SFEM further for use in structural-acoustic analysis by coupling it with BEM, the present SFEM/BEM is implemented to predict the vehicle structure-acoustic frequency response analysis, and two numerical experiments results show that the present method can provide more accurate results compared with the standard FEM/BEM using the same mesh. It indicates that the present SFEM/BEM can be widely applied to solving many engineering noise, vibration and harshness (NVH) problems with more accurate solutions.
Źródło:
Archives of Acoustics; 2017, 42, 1; 49-59
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigation of hurricane-induced failure of a military tent
Autorzy:
Kosiuczenko, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/38909364.pdf
Data publikacji:
2023
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
FEM
finite element method
strength
tent hall
wind
Opis:
The subject of this research was the analysis of a numerical case of catastrophic destruction of a large-area military tent under the influence of a hurricane impact. As a result of the research, the level of the destructive load was identified, and the construction failure process was reconstructed. The practical effect of the work was the conclusion on the reinforcement of the structure. The calculations were made using the finite element method in the LS Dyna calculation program.
Źródło:
Engineering Transactions; 2023, 71, 3; 367-381
0867-888X
Pojawia się w:
Engineering Transactions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FEM Simulation of Different Engine Mount Models in an Aircraft Piston Diesel Engine
Autorzy:
Magryta, Paweł
Pietrykowski, Konrad
Borowiec, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2204049.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
engine mount
diesel engine
aircraft
FEM
finite element method
Opis:
The article presents the results of numerical simulations using the FEM (Finite Element Method) of the engine mount strength for mounting an aircraft diesel engine with opposite pistons called PZL-100. Four versions of the mount prepared by aircraft engine producer WSK "PZL-Kalisz" company were analyzed. Tests were performed in Catia v5 software in the Generative Structure Analysis module. The boundary conditions were engine gravity force, propeller thrust force, and propeller torque. S235JR steel was defined as the material. A design grid with tetrahedral elements with a single element size of 2 mm was used. As part of the simulation study, four structural solutions for the test engine mounts were calculated in terms of strength. The results of stress maps and the magnitude of deformation of the mount elements were compared. Based on the obtained results, one of the mount versions was recommended for actual fabrication.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 5; 230--241
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the effect of projectile impact angle on the puncture of a steel plate using the finite element method in abaqus software
Autorzy:
Rosłaniec, Kuba
Powiązania:
https://bibliotekanauki.pl/articles/2097430.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
dynamic analysis
FEM
Finite Element Method
ductile damage
Abaqus
Opis:
This paper deals with the punctureability of a steel plate by a projectile at different angles of attack. The effect of the projectile angle on the force required to penetrate a plate made of A36 steel is presented using Finite Element Method calculation software. Using Abaqus software, a dynamic model of a projectile striking a plate was modelled and the force required to penetrate a 5 mm thick steel plate was presented. The intro-duction gives an overview of the genesis of the topic and a brief historical background. The chapter on numerical analysis presents the numerical model used and how the simulation was modelled. In the conclusions, a summary of the results was formulated and conclusions were drawn regarding the observations and insights of the analysis. The force required to penetrate the plate was observed to increase with increasing projectile angle of attack and it was found that, as the angle of the plate increased, the force required to penetrate increased.
Źródło:
Applied Computer Science; 2022, 18, 1; 56--69
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Another six-node triangular element for structural analysis
Autorzy:
Ton-That, Hoang Lan
Powiązania:
https://bibliotekanauki.pl/articles/38887867.pdf
Data publikacji:
2022
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
finite element method
FEM
double interpolation procedure
six-node triangular element
Opis:
A six-node triangular element is presented in this paper for structural analysis. With this approach, the approximation functions of the interpolation strategy are given by using the double interpolation procedure, which includes nodal values as well as averaged nodal gradients. The numerical results are, therefore, achieved following the proposed element. The efficiency of this element and its comparison is described by some fundamental examples. Better numerical solutions and smoother distributions of stresses not achieved by the standard elements will be provided when using this element. The computational time is also presented to overview the pros and cons of the proposed element. In fact, the new element’s computational time is higher than that based on the standard element because of the double interpolation procedure, but one does not need post-processing of any smoothing operation.
Źródło:
Engineering Transactions; 2022, 70, 3; 221-238
0867-888X
Pojawia się w:
Engineering Transactions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress analysis of suspended rail vehicle bogie
Autorzy:
Kuczyk, Mateusz
Jędrzejewski, Piotr
Załuski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/32101683.pdf
Data publikacji:
2022-05-24
Wydawca:
Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
Tematy:
bogie frame
wheelset
stress analysis
monorail
finite element method
FEM
Opis:
The main topic of this article is the strength analysis of selected bogie components – the wheelset axle and the frame. Axle calculations were based on the analytical method and were conducted with different types of materials. The finite element method was used for verification of bogie frame construction and loads applied on the frame were calculated according to the PN-EN 13749 norm. The bogie is a part of suspended electric multiple unit which was main matter of authors’ master thesis: „The concept of suspended railway engine wagon”, conducted on Mechanical Engineering Faculty of Gdansk University of Technology.
Źródło:
Rail Vehicles/Pojazdy Szynowe; 2022, 1-2; 20-29
0138-0370
2719-9630
Pojawia się w:
Rail Vehicles/Pojazdy Szynowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FEM numerical analysis of the shape bow cross-section for the rigidity of the wheelset measuring device
Autorzy:
Aniszewicz, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/215733.pdf
Data publikacji:
2019
Wydawca:
Instytut Kolejnictwa
Tematy:
rolling circle diameter
measurement
reliability
wheelset
finite element method
FEM
Opis:
The article shows the results of a computer simulation using the Finite Element Method (FEM) in order to analyze the infl uence of bows geometry cross-section for the rigidity of the instrument measuring the rolling circle diameter of the wheelset wheels. Two types of bow cross-section were considered, a rectangular shape and a shape of four thin pipes welded together. Th e considered measuring instruments should fulfi l the requirements of the standards ZN-00/PKP-3509-09 and BN-82 3509-13. FEM simulation analysis of the instrument models reveals insuffi cient instrument rigidity and indicates the need to introduce changes in the construction of the existing measuring instruments for measuring the rolling circle diameter of the wheelsets wheels.
Źródło:
Problemy Kolejnictwa; 2019, 182; 107-113
0552-2145
2544-9451
Pojawia się w:
Problemy Kolejnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic analysis of a rod vibro-impact system with intermediate supports
Autorzy:
Gursky, V.
Kuzio, I.
Powiązania:
https://bibliotekanauki.pl/articles/387223.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
rod system
electromagnetic drive
vibro-impact
resonance
finite element method
FEM
Opis:
The two-mass resonant vibro-impact module is presented as the rod system with cylindrical intermediate supports. The corresponding design diagram is constructed. Based on the finite element method, the frequency of free oscillations is defined for the corresponding location of the intermediate supports. A stress-strain state of the elastic element is considered. The stiffness of the intermediate supports is defined by solving the contact problem between the cylindrical rod supports and the flat spring. The dynamics of the vibro-impact rod system with multiple natural frequencies is analyzed taking into account the contact stiffness of the intermediate supports. The determination of contact and equivalent stresses occurring during the operation of the vibro-impact rod system is performed.
Źródło:
Acta Mechanica et Automatica; 2018, 12, 2; 127-134
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical study on the cutting force and residual stress in whirlwind milling of a large screw
Autorzy:
Guo, Qin
Wang, Yulin
Zhou, Bin
Powiązania:
https://bibliotekanauki.pl/articles/2200854.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
whirlwind milling
WM
cutting force
residual stress
finite element method
FEM
Opis:
The finite element method (FEM) is developed to simulate a discontinuous cutting in the whirlwind milling. Firstly, a simplified arc-cutting model for simulating the actual circular cutting, and a plane-cutting model for simplification were both developed and verified by experiments. Then, the effects of cutting parameters on the cutting force and residual stress were effectively investigated based on the plane-cutting model. Moreover, a plane-second- -cutting model was further developed. It showed that a minor decrease of cutting force and a higher maximum compressive stress were generated in the second cutting. Those results were conducive to predict and improve the whirlwind milling.
Źródło:
Journal of Theoretical and Applied Mechanics; 2023, 61, 1; 65--76
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of ANSYS in teaching FEM on the example of a loaded Mars rover chassis
Autorzy:
Łazuka, M.
Łazuka, E.
Powiązania:
https://bibliotekanauki.pl/articles/103140.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
ANSYS
FEM
finite element method
numerical analysis
teaching
bending
beam
chassis
Opis:
The aim of the paper is to present the idea of using ANSYS software in teaching engineering students the finite element method. ANSYS is an extremely sophisticated engineering tool used in almost every engineering company nowadays. It is introduced to almost all engineering students during their studies. Using ANSYS knowingly requires perfect understanding of the finite element method that is responsible for ANSYS work. This paper presents how this professional software can help students master FEM. The first part of the paper introduces the finite element method. It also suggests a way of using ANSYS in teaching FEM on the example of a twodimensional restrained beam calculated in a simple computer program. The second part illustrates the effectiveness of ANSYS with sample FEM analysis of a planetary rover’s chassis and presents basic fuctionalities of ANSYS Workbench Mechanical. Conducted calculations provide useful data about the model’s suitability for its purpose and possibility of modifications.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 32; 269-274
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of impulse forces acting on the eye socket walls – strength analysis
Autorzy:
Lipa, Sebastian
Mrozowski, Jerzy
Awrejcewicz, Jan
Powiązania:
https://bibliotekanauki.pl/articles/2055042.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
sports-related injuries
orbital bones
tennis ball impact
Finite Element Method
FEM
Opis:
The study presented in this paper is focused on the analysis of biomechanical effects of several impact forces exerted on the orbital skeleton. Three different cases of force application reflecting three sport-related situations have been investigated. Time histories of the impact force as well as area of its application have been considered. As a tool to carry out numerical simulation, ANSYS Workbench software platform has been used. The analysis showed that the most dangerous is the force applied to the lower part of orbital margin. In this case, the entire zygomatic bone may be damaged due to strong bending load.
Źródło:
Journal of Theoretical and Applied Mechanics; 2020, 58, 3; 757--768
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Critical Damage Function Values of CW008A Copper and S355 Steel in Tensile and Torsion Tests
Autorzy:
Walczuk-Gągała, Patrycja
Pater, Zbigniew
Wójcik, Łukasz
Lis, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/2201923.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
materials fracture
damage criterion
tensile test
torsion test
FEM
Finite Element Method
Opis:
The article describes the problem of material fracture in metal forming processes. It describes and compares the values of damage functions obtained in classical tensile and torsion tests of two materials, i.e. CW008A copper and S355 steel under cold forming conditions. The presented research methodology includes experimental tests and numerical simulation carried out using Simufact.Forming v.15 software. The damage values were analysed according to various criteria, including the growth and coalescence of micro cracks (Rice&Tracey, Oyane, Argon), the initiation and development of ductile cracking in forming processes (Freudenthal, Cockroft-Latham, Brozzo, Oh) and using extended phenomenological models based on the history of stress triaxiality (Ayada) or the mean and equivalent stress (Zhan). The conducted tests showed that the values of the damage function depend on: the calibration test, the material grade and the geometry of the specimen.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 2; 173--180
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of the influence of ribs shape on the gear transmission housing vibroactivity
Badania wpływu kształtu użebrowania korpusu na wibroaktywność przekładni
Autorzy:
Figlus, T.
Wilk, A.
Madej, H.
Powiązania:
https://bibliotekanauki.pl/articles/374107.pdf
Data publikacji:
2010
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
przekładnia
wibroaktywność
metoda elementów skończonych
MES
gear transmission
vibroactivity
finite element method
FEM
Opis:
The paper presents the results of model studies aimed at reducing the vibroactivity of the toothed gear housing. The effect was analyzed of the shape of additional ribs on changes of the forms of vibration of the upper housing plate and on its vibroactivity. Simulations were conducted using the Finite Element Method (FEM). Based on the studies performed, the shape of ribs with dimensions ensuring a reduction of vibroactivity by several dB was determined, with a minor increase of the housing weight.
Praca przedstawia wyniki badan modelowych nad obniżaniem wibroaktywności korpusu przekładni zębatej. Analizowano wpływ kształtu dodatkowego użebrowania na zmiany postaci drgań górnej płyty korpusu oraz na jej wibroaktywność. Symulacje prowadzono z wykorzystaniem MES. Na podstawie przeprowadzonych badań wyznaczono kształt żeber o wymiarach zapewniających obniżenie wibroaktywności o kilka dB, przy niewielkim wzroście masy korpusu.
Źródło:
Transport Problems; 2010, 5, 1; 63-69
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress concentration resulting from irregular shape of explosively cladded materials connections – FEM simulation
Autorzy:
Kurek, A.
Niesłony, A.
Kurek, M.
Powiązania:
https://bibliotekanauki.pl/articles/387039.pdf
Data publikacji:
2014
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
FEM
finite element method
explosive cladding
interference zone
metoda elementów skończonych
zgrzewanie wybuchowe
Opis:
The paper contains a numerical analysis of interface zone steel-titanium bimetal obtained by explosive cladding method. Due to the waviness of the zone, and various properties of the constituent material of the materials type contain structural notch. Therefore it is important inter alia in terms of presentation of the results of fatigue are the maximum stresses that occur just in the area of the zone. In the paper the stress concentration factor and the proposed method of modelling the joint zone of a sinusoidal profile, characterized by the same coefficient of stress concentration at the actual profile.
Źródło:
Acta Mechanica et Automatica; 2014, 8, 2; 103-106
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evolution of the shape of composite dowels
Autorzy:
Lorenc, Wojciech
Seidl, Günter
Berthellemy, Jacques
Powiązania:
https://bibliotekanauki.pl/articles/2172885.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
composite dowel
shear connection
composite bridge
fatigue
FEM
finite element method
hybrid beam
Opis:
Composite dowels have opened new possibilities for engineers designing composite structures. The fundamental and most important characteristic of composite dowels is the shape of the cutting line. It is important to understand why only one particular shape of the cutting line is used in bridge engineering, while so many different shapes have been investigated by many researchers. The essential part of the process of developing composite dowels – the development of the shape of the cutting line – is presented in this paper. The influence of the steel web thickness is presented, and technological problems of steel fabrication are highlighted. The role of empirical experience from the first bridges, push-out tests, and finite element simulations is presented. Assumptions for numerical procedures are given. The distinction between the steel failure and concrete failure modes is introduced for composite dowels. The paper presents how the concept of “shape” was divided into “shape,” “ratio,” and finally “size,” and how, because of the fatigue problems in bridges, all the three factors have emerged to result in the form of shapes that can satisfy the requirements for bridges. Research leading to the invention of the first version of the clothoidal shape is presented.
Źródło:
Studia Geotechnica et Mechanica; 2022, 44, 4; 296--316
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 112

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