ARTICLE
Nonlinear damping identification using an extended stabilized layers method
 
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Mechanics, Modelling and Production Laboratory (LA2MP), National Engineering School of Sfax, University of Sfax, Sfax, Tunisia
 
 
Submission date: 2025-12-27
 
 
Final revision date: 2026-02-25
 
 
Acceptance date: 2026-03-25
 
 
Online publication date: 2026-05-21
 
 
Corresponding author
Nourhaine YOUSFI   

Mechanics, Modelling and Production Laboratory (LA2MP), National Engineering School of Sfax, University of Sfax, Sfax, Tunisia
 
 
 
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ABSTRACT
In many practical mechanical systems, the dynamic response is strongly influenced by time-varying stiffness, often coupled with nonlinear damping effects. Neglecting stiffness variability may lead to inaccurate predictions of vibration amplitudes and energy dissipation. This study is the first to extend and apply the stabilized layers method for nonlinear (SLMnl) damping identification to mechanical systems with time-varying stiffness. The SLMnl,kv is developed for multi-degree-offreedom systems exhibiting nonlinear damping and time-varying stiffness. The effectiveness of the proposed method is demonstrated through its application to a spur gear pair system characterized by nonlinear damping and time-varying mesh stiffness.
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