Vibration control using nonlinear damped coupling

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Tehrani, Maryam Ghandchi^1 ; Gattulli, Vincenzo^2

Institute of Sound and Vibration Research, University of Southampton, Southampton

SO17 1EN, United Kingdom^1

University of l'Aquila, Italy^2

关键词: Analytical method;    Dynamic equations;    Excitation characteristics;    Harmonic Balance method;    Linear mechanical oscillators;    Non-linear response;    Nonlinear damping;    Time-domain simulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012132/pdf
DOI  :  10.1088/1742-6596/744/1/012132

来源: IOP

【 摘 要 】

In this paper, a dynamical system, which consists of two linear mechanical oscillators, coupled with a nonlinear damping device is considered. First, the dynamic equations are derived, then, an analytical method such as harmonic balance method, is applied to obtain the response to a harmonic base excitation. The response of the system depends on the excitation characteristics. A parametric study is carried out based on different base excitation amplitudes, frequencies, and different nonlinear damping values and the response of the system is fully described. For validation, time domain simulations are carried out to obtain the nonlinear response of the coupled system.