Identification of Nonlinear Damping Using Energy Balance Method with Random Pulse Excitation

Abstract

This paper presents the application of the energy balance equation to the identification of nonlinear damping in complex multi-degree-of-freedom systems subjected to excitations in the form of a random series of impulses. It is proven that the proposed procedure makes it possible to determine damping characteristics irrespective of the form of purely elastic interactions and the occurrence of the so-called mixed term. The procedure was verified experimentally, using a system with two degrees of freedom. The effect of the intensity with which impulses appear (pulse rate) on the quality of the obtained results is examined. The presented method can be applied to investigate the damping of vibrations of selected elastodamping elements in real vibrating systems.

Keywords

Nonlinear dynamical systems modeling identification pulse excitation

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