Selection of viscous damping coefficients using the continuous wavelet transform method for a gear system
Nourhaine Yousfi 1, 2  
,   Bacem Zghal 1,   Ali Akrout 1, 2,   Lassaad Walha 1,   Mohamed Haddar 1
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Mechanics, Modelling and Production Research Laboratory (LA2MP), National Engineering School of Sfax, University of Sfax, Tunisia
National Engineering School of Tunis, University of Tunis El-Manar, Tunisia
Submission date: 2019-01-15
Final revision date: 2019-08-27
Acceptance date: 2019-10-16
Online publication date: 2020-07-15
Publication date: 2020-07-15
Journal of Theoretical and Applied Mechanics 2020;58(3):585–598
Viscous damping is frequently used in the equation of motion to present the dissipation mechanism of a mechanical system. The orders of frequencies can be easily selected to determine viscous damping coefficients (VDCs) when the degree of freedom of the structure is low. For complex structures, difficulties in selecting the orders of reference frequencies to obtain reasonable VSCs are encountered. This paper mainly discusses the capability of the CWT method to select optimum frequencies of viscous damping formulation. The proposed procedure considers both the classical Rayleigh, modal and the proposed full model modal damping. The method is validated using a numerical time domain response of a two-stage gear system.
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