Effects of Vessel Configurations on the Damping Effects of an Impact Damper Using an Elasto-Plastic Material

Abstract

In this study, the damping effects of an impact damper which consists of a vessel and elasto-plastic balls are evaluated. Lead is employed as an elasto-plastic material. Numerical simulations are performed based on a discrete element method. In the numerical simulations, the impact force modeling is modified so as that the elasto-plasticity of the material can be considered. And the rotation of a particle is also considered to simulate the actual particle behaviors at the collision. Frequency responses of the vessel and the damping effect of the damper are evaluated for 2 kinds of impact force models. Also, the effects of vessel dimensions, vessel configurations and the excitation directions are investigated. As a result, the effects of the above mentioned parameters are clarified.