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Wyszukujesz frazę "Walha, L." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
Effect of the gear local damage and profile error of the gear on the drivetrain dynamic response
Autorzy:
Ghorbel, A.
Zghal, B.
Abdennadher, M.
Walha, L.
Haddar, M.
Powiązania:
https://bibliotekanauki.pl/articles/280233.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
dynamic behaviour
clutch
gear
brake disc
gear local damage
gear profile error
Opis:
The dynamic modeling of vibration of a drivetrain is used for increasing our information about vibration generating mechanisms, especially in the presence of some kind of gear faults. This paper describes a research work on the automotive driveline modeling, vibration analysis, and the effect of gear defects on the dynamic behavior of the system. Firstly, main drivetrain components including the engine, clutch, single stage spur gearbox and disc brake are modeled, respectively. The nonlinear dynamic model is simulated by a thirteen degrees of freedom (DOF) system and the nonlinear function is due to the dry friction path. Secondly, two types of defects are modeled and introduced into the spur gear system; local damage and profile error. Then, the nonlinear equations of motion are solved by the numerical Runge Kutta method and a comparative study of the dynamic behavior of the system in healthy and defected cases is discussed for each fault type. The influence of the defects on the vibration response is presented in the time and frequency domain. Finally, analysis of the two defects together is presented.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 3; 765-779
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Tytuł:
Porous material effect on gearbox vibration and acoustic behavior
Autorzy:
Letaief, M. R.
Walha, L.
Taktak, M.
Chaari, F.
Haddar, M.
Powiązania:
https://bibliotekanauki.pl/articles/281269.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
porous material
gearbox
vibro-acoustic behavior
Opis:
In this paper, we define a resolution method to study the effect of a porous material on vibro-acoustic behavior of a geared transmission. A porous plate is coupled with the gearbox housing cover. The developed model depends on the gearbox characteristic and poroelastic parameters of the porous material. To study the acoustic effect of the housing cover, the acoustic transmission loss is computed by simulating numerically the elastic-porous coupled plate model, and the numerical implementation is performed by directly programming the mixed displacement-pressure formulation. To study the vibration effect, the bearing displacement is computed using a two-stage gear system dynamical model and used as the gearbox cover excitation. Numerical implementation is performed by direct programming of the Leclaire formulation.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1381-1395
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
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
    Wyświetlanie 1-4 z 4

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