噪声与振动控制2016，Vol.36Issue(2)：35-39,5.DOI:10.3969/j.issn.1006-1335.2016.02.008
基于弹性基础的多级并联调谐质量阻尼器设计
Design of Multi-grade Parallel Dynamic Vibration Absorbers on an Elastic Foundation
贺小龙 1张立民 1屈晶晶 1郭力荣 1周辉1
作者信息
- 1. 西南交通大学 牵引动力国家重点实验室，成都 610031
- 折叠
摘要
Abstract
The mathematical model of the multi-grade parallel dynamic vibration absorber on an elastic foundation was established. The dimensionless expression of the amplitude magnification factor and the impedance of the elastic foundation were gained. It was found that the influence of the elastic foundation on the main system cannot be ignored. Considering its advantage of vibration decay, the necessity to optimize the multi-grade parallel system was proposed. The influence of the distance u between the connection and the end of the beam on the main system was analyzed. It was found that the less u will lead to the smaller influence of the beam elastic vibration on the main system. The first frequency vibration of the beam will not couple with the first frequency vibration of the main system when u≤1 m, and the u has the largest influence on the main system when u=2 m. The numerical optimization method was used to design the parameters of 2-grade parallel and 4-grade parallel systems. The result shows that the result of the rigid connection system is not applicable to the elastic system. The elastic connection system can effectively optimize the multi-grade parallel system and reduce the influence of the beam’s elastic vibration on the main system. Finally, influence of the dynamic stiffness of the connection on the main system was studied. It shows that the first natural frequency of the beam has no effect on the first three nature frequencies when K≥40 kd, and the influence of the beam on the main system can be neglected whenK≥70 kd.关键词
振动与波/弹性梁/多级并联/调谐质量阻尼器/优化设计Key words
vibration and wave/elastic beam/multi-grade parallel/dynamic vibration absorber/optimum design分类
数理科学引用本文复制引用
贺小龙,张立民,屈晶晶,郭力荣,周辉..基于弹性基础的多级并联调谐质量阻尼器设计[J].噪声与振动控制,2016,36(2):35-39,5.
