Analysis of energy dissipation mechanism and vibration restrain about particles damping based on DEM

YANG Ying, ZHAO Xiwei, HE Meng

(School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China)

Abstract: Aiming at the Mechanism main system with closed space which was filled in with tiny particles; vibration control problem was studied by analyzing the vibration control effect which was impact by the particles size number and material characteristic. Discrete element method (DEM) was used to analyze the kinematics characteristic among particles and particles with main system. Calculation models which can represent particles forces distortion and energy dissipation during impact collision and friction were established. The mechanism of collision and energy dissipation among particles was studied. The method which can determine the magnitude of particles state, force and energy dissipation during collision were found. The vibration property which is influenced by the particles material numbers and sizes was demonstrated by using Matlab. The vibration restrains rule was shown which was influenced by size number and material of particles. A testbed was established. The testing result were identical with the simulation result, which shows that the algorithm is validity, this algorithm can provide an important reference for promoting vibration restrain design of the mechanism.

Key words: particle damping; discrete element method(DEM); vibration restrain; collision and energy dissipation