Temat: analysis method - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The stability of a steel welded girder with bending and shear forces included
Autorzy:: Sygulski, R.
Guminiak, M.
Polus, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/387654.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: buckling analysis
finite element method
boundary element method
Opis:: The stability of the element of a steel welded girder subjected to bending and shear forces is considered. The considered element is a rectangular plate supported on boundary. The type of a plate boundary conditions depend on the types (thickness) of the stiffeners. Considered plate is loaded by in-plane forces causing bending and shear effects. The Finite Element Method was applied to carry out the analysis. Additionally the Boundary Element Method in terms of boundary-domain integral equation was applied to evaluate the critical shear loading.
Źródło:: Acta Mechanica et Automatica; 2017, 11, 1; 14-19
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Using the finite element method in the modeling of layered composite delamination
Autorzy:: Tucki, K.
Powiązania:: https://bibliotekanauki.pl/articles/410736.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:: delamination
composite
analysis
finite element method
Opis:: The article presents issues associated with an analysis of the process of delamination of fibrous composite using the Finite Element Method. Research encompassed three computer modelling sessions for delamination of the material for three different values of distance between the test force application point and the middle of the laminate. The results, encompassing the force value and displacement, were then compared to identify the correlation between these variables and the distance from the force application point. The model correctness was also verified by comparing the value of forces modelled with the real values, obtained during an experiment. On the basis of the results obtained with regard to the size of the force applied, it was concluded that the numerical model represented well the mathematical model presented by Comanho. The negative result errors were due to the increased sensitivity of the software to the laminate fracture phenomenon, occurring during the experiment. Thanks to good representation of the model, it can be used interchangeably with numerical calculations.
Źródło:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2016, 5, 2; 51-62
2084-5715
Pojawia się w:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Verification of ram-press pipe bending process using elasto-plastic fem model
Autorzy:: Sidun, J.
Łukaszewicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/386877.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: pipe bending
FEM analysis
finite element method
Opis:: In this paper selected aspects of numerical modelling of bending pipes process are described. Elasto-plastic material model was used in COMSOL FEM environment. The results of numerical analyses of two kinds of steel were presented. The correctness of the proposed model was verified based on comparison shapes of deformed pipe profile obtained at the ending step of bending both from numerical simulations and experiment.
Źródło:: Acta Mechanica et Automatica; 2017, 11, 1; 47-52
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of engine rotational speed on the natural frequencies of the turbine blade
Autorzy:: Witek, L.
Powiązania:: https://bibliotekanauki.pl/articles/242083.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: turbine blade
modal analysis
resonant frequency
finite element method
experimental analysis
Opis:: In this work, the influence of the engine rotational speed on the natural frequencies of the turbine blade was investigated. In first part of the work the experimental modal analysis of the blade were made using the vibration system. The investigated blade was fixed to the movable head of the shaker. The blade amplitude was measured using the piezoelectric accelerometers. As results of experimental modal analysis, the resonant frequencies for first three modes of vibration were determined. In the next step of the work, the numerical models of the blades with different size of the finite elements were performed in order to check the convergence of the numerical solution. For each models the natural frequencies were determined for the non-rotated blade. The numerical results were next compared to the results of experimental modal analysis. After this comparison, one model only was selected for the further computations. In the last part of the work, the complex multi-steps analysis was performed in order to investigate the influence of turbine rotational speed on the modes and natural frequencies of the blade. Obtained results are important from both the research and also the practical point of view and have an influence on reliability of the engine.
Źródło:: Journal of KONES; 2016, 23, 1; 421-428
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Numerical evaluation of sensitivity of stress distribution in bone to geometric parameters of endoprosthesis
Autorzy:: Kowalczyk, P.
Powiązania:: https://bibliotekanauki.pl/articles/280295.pdf
Data publikacji:: 1999
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: biomechanics
sensitivity analysis
finite element method
contact problems
Opis:: One of serious drawbacks in the bone endoprosthetics is the implant separation from bone or cement. Stress concentrations on the implant surface are deemed major factor in this process and implant shape optimization seems to be a natural way of improvement of stress disrtibution. An important tool in effective optimization algorithms is design sensitivity analysis (DSA). The discretized formulation of the problem in terms of the finite element method is presented in this paper. A three-dimensional model of femur with a cementless implant analysed. Frictionless contact and perfect bonding are assumed on the smooth and rough parts of the implant surface, respectively. Computational examples show the stress concentrations and their sensitivity to various geometric parameters of the implant.
Jednym z poważnych mankamentów endoprotetyki stawów jest odrywanie się implantu od cementu lub kości. Główną przyczyną tego zjawiska są koncentracje naprężeń na powierzchni implantu. Optymalizacja kształtu implantu jest uważana za naturalną drogę do przeciwdziałania temu zjawisku. Ważnym narzędziem w algorytmach optymalizacji jest analiza wrażliwości parametrycznej (DSA). Praca przedstawia sformułowanie zagadnienia wrażliwości w zdyskretyzowanym ujęciu metody elementów skończonych. Analizowana jest kość udowa z implantem bezcementowym o powierzchni gładkiej, a w górnej części porowatej. Przykłady numeryczne przedstawiają koncentracje naprężeń w tkance kostnej i ich wrażliwość na różne parametry kształtu implantu.
Źródło:: Journal of Theoretical and Applied Mechanics; 1999, 3; 555-577
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Applications of alternating direction solver for simulations of time-dependent problems
Autorzy:: Łoś, M.
Paszyński, M.
Powiązania:: https://bibliotekanauki.pl/articles/952948.pdf
Data publikacji:: 2017
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: finite element method
isogeometric analysis
Alternating Direction Solver
Opis:: This paper deals with the application of an Alternating Direction Solver (ADS) to a non-stationary linear elasticity problem solved with the isogeometric finite element method (IGA-FEM). Employing a tensor product B-spline basis in isogeometric analysis under some restrictions leads to a system of linear equations with a matrix possessing a tensor product structure. The ADI algorithm is a direct method that exploits this Kronecker product structure to solve the system in O (N), where N is the number of degrees of freedom (basis functions). This is asymptotically faster than state-of-the-art, general-purpose, multi-frontal direct solvers when applied to explicit dynamics. In this paper, we also present a complexity analysis of the ADS incorporating dependence on the B-spline basis of order p.
Źródło:: Computer Science; 2017, 18 (2); 117-128
1508-2806
2300-7036
Pojawia się w:: Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

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

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Skocz do pozycji: 8.

Tytuł:: FEM and experimental based analysis of the stamping process of aluminum alloy
Autorzy:: Różyło, P.
Wójcik, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/102747.pdf
Data publikacji:: 2017
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: pressing
experimental study
numerical analysis
finite element method
Opis:: The subject of the study was aluminum samples of varying thickness. The aim of the study was to perform the experimental stamping process of the samples on a universal testing machine and a numerical analysis on two independent computer systems Abaqus® and Deform-3D. As part of the numerical analysis, bilinear material model was included, taking into account elastic and plastic characteristics. The study was conducted in a dynamic environment with geometric nonlinearity. The results obtained from experimental research were confronted with those obtained by FEM computer simulation. During the research, numerical model of the stamping process has been developed, which was validated with the results of experimental research.
Źródło:: Advances in Science and Technology. Research Journal; 2017, 11, 3; 94-101
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Analytical and experimental vibration analysis of telescopic platforms
Autorzy:: Yucel, A.
Arpaci, A.
Powiązania:: https://bibliotekanauki.pl/articles/949115.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: telescopic platforms
modal analysis
finite element method
vibration
Opis:: In this study, vibration analysis of a telescopic platform is conducted, and the platform structure is reconstructed to satisfy vibrational standards. The analysis is realised using solid modelling, finite elements and an analytical method. The results are verified using experimental modal techniques. Through the finite element and experimental modal approach free vibration analysis is carried out and natural frequencies are determined. Additionally, vibration accelerations of the structure are obtained by forced vibration analysis of the model. All calculations one performed on the new reconstructed structure, and it is determined whether the reconstructed structure satisfies the vibrational standards.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 1; 41-52
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Flow simulations in cross-flow fans using the finite element and finite volume methods
Autorzy:: Sowa, A.
Powiązania:: https://bibliotekanauki.pl/articles/1955710.pdf
Data publikacji:: 2004
Wydawca:: Politechnika Gdańska
Tematy:: turbomachinery
cross-flow fan
finite element method
finite volume method
usteady flow analysis
Opis:: Both basic computational fluid dynamics methods: the finite element method (FEM) and the finite volume method (FVM) have been used to simulate flow fields in a cross-flow fan (CFF). A review of previous numerical simulations of flow in CFF's is presented. The theorethical foundations of the applied numerical algorithms and specifications of the computer programs are given. The procedure of computations is described in detail. Computational results are shown in the form of contour and vector velocity and contour pressure plots.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 1; 41-49
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: The impact of speed as well as selected parameters of slot insulation on the distribution of temperature in linear motion converters
Autorzy:: Mikołajewicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/141198.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: thermal field
finite element method
linear motors
numerical analysis
Opis:: This paper presents and discusses the mathematical model of thermal phenomena occurring in axis-symmetric electromechanical linear motion converters. On the basis of the developed model, software to analyze the process of the heating up of this type of converters, was created. The effect of the thickness and type of material of the slot insulation, as well as the speed of the runner on the temperature distribution in the analyzed object was examined in-depth. Selected results of simulated calculations have been presented.
Źródło:: Archives of Electrical Engineering; 2016, 65, 4; 855-864
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Geometrically nonlinear static analysis of sandwich plates and shells
Geometrycznie nieliniowa analiza statyczna płyt i powłok warstwowych
Autorzy:: Marcinowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/280467.pdf
Data publikacji:: 2003
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: sandwich shells
othotropy
nonlinear stability analysis
finite element method
Opis:: Sandwich shells composed of three layers: two thin and very strong faces, and the soft and comparatively weaker core which is much thicker than their neighbouring layers covering it from up and down, are considered in the paper. The proposal of a finite element adequate to such a kind of structural members is presented. In the paper the finite element based principally on the Ahmad original element and on the author's adaptation of this very element to the nonlinear range is presented. It was assumed that in the faces and in the core the materials exibit orthotropic properties, and only elastic deformations are taken into account. The static analysis is performed within fully geometrically nonlinear range. The ultimate purpose of the work is determination of the critical value of the load intensity factor in a quasi static stability analysis. All procedures related to tracing of nonlinear equilibrium paths are adopted from the codes prepared before for homogeneous shells. Two verification problems are inserted. They confirm correctness of the adopted approach.
W pracy rozważa sie płyty i powłoki warstwowe złożone z trzech warstw: dwóch twardych okładek i stosunkowo miękkiego rdzenia, który jest znacznie grubszy od przykrywających go okładek. Zaprezentowano element skończony, oparty na koncepcji degeneracji ośrodka trójwymiarowego, dobrze opisujący własności mechaniczne takiej powłoki. W opracowanym elemencie wykorzystano oryginalną koncepcję Ahmada, Ironsa i Zienkiewicza rozszerzoną przez autora na zakres geometrycznie nieliniowy. Zakładając błonowy stan odkształceń i naprężeń w okładkach, uzupełniono macierz sztywności rdzenia o macierze sztywności okładek wykorzystując przy tym te same stopnie swobody, które wyprowadził Ahmad. Założono, że materiały rdzenia i okładek są liniowo sprężyste i wykazują własności ortotropii. Przedstawiona analiza obejmuje zagadnienia quasistatyczne w zakresie dużych przemieszczeń i umiarkowanych obrotów ze szczególnym uwzględnieniem utraty stateczności równowagi. Do wyznaczania geometrycznie nieliniowych ścieżek równowagi wykorzystano procedury autorskie stosowane wcześniej z powodzeniem w przypadku powłok pełnych, jednorodnych. W pracy przedstawiono kilka przykładów potwierdzających poprawność proponowanej koncepcji. Przeprowadzone testy wykazały, że sformułowane założenia i oparta na nich koncepcja opisu są prawdziwe dla powłok warstwowych, w których stosunek grubości okładki do grubości rdzenia jest mniejszy od 1/15.
Źródło:: Journal of Theoretical and Applied Mechanics; 2003, 41, 3; 561-574
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Passive safety of a buggy-type car in the aspect of a dynamic analysis of the frame
Autorzy:: Różyło, Patryk
Powiązania:: https://bibliotekanauki.pl/articles/386470.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: passive safety
finite element method
dynamic impact analysis
overload
abaqus
Opis:: This article presents passive safety issues of a buggy-type car. The issue has been presented in the context of the dynamic impact analysis of the aluminium frame of the vehicle into a rigid wall. The study was conducted using the finite element method in the Abaqus® software. With regard to numerical calculations, a dynamic impact simulation was performed, which defined the critical areas of the structure. Numerical analysis allowed to obtain both the state of the strain of the frame structure and the characteristics of the construction work during the impact. The results of the research provide high-quality prepared FEM model.
Źródło:: Acta Mechanica et Automatica; 2019, 13, 2; 75-79
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Numerical Simulation of Fatigue Fracture of the Turbine Disc
Autorzy:: Witek, L.
Powiązania:: https://bibliotekanauki.pl/articles/97889.pdf
Data publikacji:: 2012
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:: aircraft engine
crack propagation analysis
finite element method
fatigue fracture
Opis:: This paper presents the results of the crack propagation analysis of an aircraft engine turbine disc. In the first part of the work the finite element method was used for calculation of the stress state and the stress intensity factor (SIF, K_I, K-factor) in the turbine disc with an embedded quarter-elliptical corner crack, subjected to low-cycle thermo-mechanical fatigue. To refine the K-factor calculation, specially degenerated finite elements were used. These elements provide stress singularity suitable for the linear-elastic material of the disc. The performed calculations yielded the stress intensity factor K_I for different crack sizes. Subsequently, ΔK parameter was determined as a difference of the K_I values calculated for the turbine’s speeds equal to 6373 and 14200 RPM. Based on the Paris-Erdogan equation and the obtained ΔK values, the fatigue crack growth plot for the turbine disc subjected to complex thermo-mechanical loads was determined.
Źródło:: Fatigue of Aircraft Structures; 2012, 4; 114-122
2081-7738
2300-7591
Pojawia się w:: Fatigue of Aircraft Structures
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

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

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