ARTICLE
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
,  
 
 
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1
Mechanics, Modelling and Production Research Laboratory (LA2MP), National Engineering School of Sfax, University of Sfax, Tunisia
2
National Engineering School of Tunis, University of Tunis El-Manar, Tunisia
Online publication date: 2020-07-15
Publication date: 2020-07-15
Submission date: 2019-01-15
Final revision date: 2019-08-27
Acceptance date: 2019-10-16
 
Journal of Theoretical and Applied Mechanics 2020;58(3):585–598
KEYWORDS
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ABSTRACT
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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