关键词: 振动控制, 冲击减振, 数值仿真, 摩擦耗能, 粉体阻尼

Abstract:

NOPD(Non-Obstructive Particle Damping), also called powder damping technology, is a new passive vibration absorption technology developed since 90's. In this paper, a beam with holes and two free ends is taken as the research object. The theoretical model of vibration absorption is established from two aspects: one is the friction among particles, and the other is the impact action of particles added to the system. Numerical simulation of vibration response is completed and experiment is fulfilled to testify the theoretical model. So the vibration absorption characteristics of NOPD are researched deeply.

Key words: vibr ation contr ol, v ibra tio n absor ptio n of im paction, computer simulatio n, energ y absor ptio n offrictio n, pow der damping