Vibration Suppression of Multiple Modes by a Dynamic Absorber of Piecewise Linear Type

Abstract

The aim of this study is to investigate the possibility of vibration suppression of multiple modes for a system with a piecewise linear type dynamic absorber without dampers and to consider the vibration suppression mechanism. The effects of parameters of the piecewise linear type dynamic absorber on vibration suppression are investigated using numerical analysis. The results show that the piecewise linear type dynamic absorber with particular parameters suppresses multiple modes vibration. The time series data of the frequency being suppressed shows intermittent chaotic vibration. In addition, when the apparent stiffness and the apparent damping coefficient were calculated from the relative displacement and the internal force between the main system and the piecewise linear type dynamic absorber, focusing on the exciting frequency component, it was found that the apparent characteristics were close to the optimal design values for each mode.