摘要：Spring-supported fine particle impact damper which integrates the effects of elastic deformation and the plastic deformation performs excellently on the attenuation of vibration in cantilever beam. This article studies the damping performance of spring-supported fine particle impact damper experimentally and establishes a dynamic model for understanding its mechanism. Results of the modeling are compared with conducted experiments based on the defined dimensionless structure parameters. The effects of chamber clearance ratio, stiffness ratio, and power ratio are analyzed with the model. As a result, it is shown that the spring-supported fine particle impact damper reduces 80% of the maximum amplitude of cantilever beam at the resonance point which is better compared with the 40% reduction of single impact damper; the dynamic model of the spring-supported fine particle impact damper is reliable, and there exists optimal structure parameters which are 0.15 of clearance ratio and 0.007 of stiffness ratio for achieving the best damping performance.
关键词：Impact damper; particle; plastic deformation; support; dynamic model
