利用动力吸振器进行随机响应控制的研究

An Investigation of Using Dynamic Absorber to Reduce Random Response

对实际结构作减振设计时,经常遇到结构激励源未知的情况。本文研究利用结构的动力特性和实测的随机响应数据,设计动力吸振器的问题。利用频响函数综合技术,导出了结构安装动力吸振器前后的响应之间的关系,运用优化方法,确定动力吸振器的最优设计参数。计算结果表明,最优设计参数与原结构的响应有关,所提出的方法是可行的。

When the design of reducing vibration for a real structure is carried out,the case that the excita- tion on the structure is unknown is often met.This paper investigates the problems of using the dynamic characteristics and measured random response of the structure to design the dynamic absorber.The rela- tionship between the structural responses before and after the dynamic absorber attached is derived by the FRF's synthesis technique.Thus,the optimal design parameters of the absorber can be determined by the optimizition methods.The calculating results show that this method is feasible,and the optimal parameters are correlative with the responses of original structure.