Temat: finite element method analysis - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Scaling laws for the FE solutions of induction machines
Autorzy:: Nell, Martin
Lenz, Jonas
Hameyer, Kay
Powiązania:: https://bibliotekanauki.pl/articles/141030.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: evolutionary strategy
finite element method analysis
induction machine
induction motor
loss calculation
multi-objective optimization
scaling laws
Opis:: In this paper a scaling approach for the solution of 2D FE models of electric machines is proposed. This allows a geometrical and stator and rotor resistance scaling as well as a rewinding of a squirrel cage induction machine enabling an efficient numerical optimization. The 2D FEM solutions of a reference machine are calculated by a model based hybrid numeric induction machine simulation approach. In contrast to already known scaling procedures for synchronous machines the FEM solutions of the induction machine are scaled in the stator-current-rotor-frequency-plane and then transformed to the torque-speed-map. This gives the possibility to use a new time scaling factor that is necessary to keep a constant field distribution. The scaling procedure is validated by the finite element method and used in a numerical optimization process for the sizing of an electric vehicle traction drive considering the gear ratio. The results show that the scaling procedure is very accurate, computational very efficient and suitable for the use in machine design optimization.
Źródło:: Archives of Electrical Engineering; 2019, 68, 3; 677-695
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

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: 3.

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: 4.

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: 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:: Laminar mixing flow in a stirred vessel
Autorzy:: Egidi, N.
Misici, L.
Piergallini, R.
Powiązania:: https://bibliotekanauki.pl/articles/1964081.pdf
Data publikacji:: 2001
Wydawca:: Politechnika Gdańska
Tematy:: mixing flow
laminar mixing flow
viscous liquids
finite elements
finite element analysis
finite element method
Opis:: Using finite element method we study the transient motion of fluid particles in a 3D cavity, when the fluid is incompressible viscous and with uniform density. The fluid is mixed under the action of four-blades turbine that is simulated by a velocity function. The mixing quality of the fluid is studied qualitatively, by visualization, and quantitatively, by measuring the indices of diffusion and dispersion.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 1; 71-83
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: 8.

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: 9.

Tytuł:: The impact of the structural form on the stress distribution in a flexspline of a hermetic harmonic driver
Autorzy:: Pacana, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/1839617.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: flexspline
harmonic drive
stress analysis
finite element method (FEM)
Opis:: This paper presents a comparative analysis with different models of the flexspline for a harmonic hermetic drive. The flexspline is a thin-walled construction, deforming during work, so its design is a very complicated process. The paper contains a strength analysis for some selected models of this gear. Calculations were performed using the finite element method (FEM) in ADINA. The work presents stress diagrams in longitudinal intersections for susceptible wheels of different shapes for direct comparison. Suggested changes in construction of the flexspline will increase durability of a welded hermetic gear.
Źródło:: Journal of Theoretical and Applied Mechanics; 2020, 58, 4; 1049-1060
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

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

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Skocz do pozycji: 11.

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: 12.

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: 13.

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: 14.

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: 15.

Tytuł:: Seepage and Slope Stability Analysis of Earthen Dam: A Case Study of Koga Dam, Ethiopia
Autorzy:: Zewdu, Amanuel
Powiązania:: https://bibliotekanauki.pl/articles/1076666.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Finite element method
PLAXIS 2D
Seepage
Stability analysis
Opis:: Evaluations of an earth-fill dam throughout its service life must ensure the stability of it against seepage and slope failure. This study presents the seepage and slope stability of the Koga earth-fill dam. The analyses were carried out using a finite element based PLAXIS 2D software, and covers the whole dam body; including 20 m of foundation depth. The behavior of both the body and the foundation of the dam were described using the Mohr-Coulomb criterion. Assessments of safety factor and quantity of seepage through the main body of the dam and foundation were carried out at different critical loading conditions. In this study, seepage analysis was undertaken of flow rate, pore water distribution and location of phreatic line. Additional actual field data measurements and observatory investigation were also carried out. From the simulated results, the average flow rate of seepage for the entire length of the body of the dam at normal pool level was equal to 0.06085 m3/s, whereas the figure for that through the foundation of the dam was 0.01937 m3/s. Moreover, total seepage through the main body of the dam at the current reservoir level was 0.04982 m3/s, while the actually measured quantity of seepage accumulated at the downstream toe of the dam was 0.04644 m3/s. The simulated and measured seepage discharges are 93.2 % similar. Based on the result of this study, the resulting factor of safety values during end of construction, steady state condition and rapid drawdown condition were 1.6221, 1.6136 and 1.2199, respectively. Using recommended design standards: United States army corps of engineers (USACE), British dam society (BDS) and Canadian dam association (CDA), the slope stability analysis of the Koga earth dam at all critical loading conditions are safe.
Źródło:: World News of Natural Sciences; 2019, 26; 191-217
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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