Vibration Reduction Performance of Multi-Particle Dampers Under Different Assumptions of Particle Motion States

Abstract

Multi particle dampers have complex nonlinear characteristics. On the basis of analyzing the motion state of particles, different equivalent mechanics models have been proposed under different motion state assumptions. However, assumptions of mechanical models have a certain impact on the simulation result of vibration reduction performance. A full state equivalent single particle mechanics model was proposed on the basis of fully analyzing the motion state of a single particle. The method for numerical simulation of vibration reduction performance has also been proposed. The damping performance corresponding to different mechanical models was discussed subsequently under free vibration, harmonic, and seismic excitation. The results indicate that the assumption of motion state has a certain impact on the damping performance of multi particle dampers, especially considering the influence of acceleration