Temat: polynomial chaos - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of uncertainty in aerodynamic performance on the dynamic response of a two stage gear system
Autorzy:: Tounsi, M.
Beyaoui, M.
Abboudi, K.
Feki, N.
Walha, L.
Haddar, M.
Powiązania:: https://bibliotekanauki.pl/articles/281135.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: gearbox
uncertainty
power coefficient
random parameter
polynomial chaos
Opis:: In this paper, the nonlinear dynamic response in a wind turbine system is considered and the quantification of uncertainty effects on the variability of this nonlinear response is investigated. Under dynamic conditions, a lumped model with 12 degrees of freedom is proposed taking into account the uncertainty associated to the power coefficient of the input aerodynamic torque. The dynamic response of the two-stage spur gear system is obtained using ODE45 solver of Matlab. The Polynomial Chaos (PC) method is used to introduce the uncertainties on the proposed model. A comparison between the two dynamic responses given by the proposed lumped dynamic model takes into account the uncertainty. It is performed on the existed model without uncertainty. Thus, the efficiency and robustness of the proposed new methodology is evaluated.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 2; 601-612
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Dynamic response of a spur gear system with uncertain parameters
Autorzy:: Guerine, A.
Hami, A. E.
Walha, L.
Fakhfakh, T.
Haddar, M.
Powiązania:: https://bibliotekanauki.pl/articles/280323.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: uncertainty
spur gear system
polynomial chaos approach
gear parameters
Opis:: In this paper, we propose a new approach for taking into account uncertainties based on the projection on polynomial chaos. The new approach is used to determine the dynamic response of a spur gear system with uncertainty associated to gear system parameters. The simulation results are obtained by the polynomial chaos approach for dynamic analysis under uncertainty. The proposed approach is an efficient probabilistic tool for uncertainty propagation. It has been found to be an interesting alternative to the parametric studies. The polynomial chaos results are compared with Monte Carlo simulations.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 3; 1039-1049
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Numerical modeling of uncertainty in acoustic propagation via generalized Polynomial Chaos
Autorzy:: Dammak, Khalil
Koubaa, Sana
Elhami, Abdelkhalak
Walha, Lassaad
Haddar, Mohamed
Powiązania:: https://bibliotekanauki.pl/articles/280126.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: finite element simulation
uncertainty quantification
acoustic propagation
generalized Polynomial Chaos
Opis:: This work aims at increasing the performance prediction for acoustic propagation systems that will operate in the presence of the inevitable parameters uncertainty. In the present contribution, the finite element method is applied to solve an acoustic problem described by the Helmholz equation when the geometric and material properties present uncertainty. The influence of the uncertainty of physical parameters on the pressure field is discussed. The results using the polynomial chaos expansion method are compared with Monte Carlo simulations. It is show that uncertainty levels in the input data could result in large variability in the calculated pressure field in the domain.
Źródło:: Journal of Theoretical and Applied Mechanics; 2019, 57, 1; 3-15
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

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