可控阻尼对隔振系统的影响  

Effects of controlled damping on isolation system response

作　　者：王永刚[1] 郑碧玉[1] 

机构地区：[1]长安大学理学院,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2005年第5期108-112,共5页Journal of Chang’an University(Natural Science Edition)

摘　　要：为了讨论阻尼的隔振效果,将隔振系统的分析模型写成统一的控制方程形式,并运用该控制方程组分析了粘性阻尼和磁流变阻尼(MRD),即:最佳粘性阻尼及可控粘性阻尼对响应的影响;对粘性阻尼器施加开关控制时产生的问题;被动MRD的平均粘性阻尼系数的计算方法;对MRD重置控制时产生的问题。结果表明,可控粘性阻尼器的隔振效果取决于激力类型和隔振系统参数,隔振效果与阻尼器参数优化设计密切相关。In order to discuss the isolation effect of dampers, the functions of controllability of viscous dampers and magnetorheological dampers （MRD） are stressed. The mathematical model of an isolation system is expressed by the uniform control equation system for the purpose of the comparison between two types of the dampers. By the means of the control equation, an isolation system with two degree of freedom is analyzed. The effects of the passive viscous damping on the response are discussed. The problems for the viscous dampers with switching control law are studied. The effects of passive MRD on the response are analyzed and an average viscous damping ratio of MRD is derived. The reset control law of MRD dampers is presented. The results show that the isolation performance of controllable viscous dampers depends on the type of excited force and the parameters of an isolation system. 1 tab, 5 figs, 7 refs.

关 键 词：振动力学 隔振 阻尼 磁流变阻尼器 粘性阻尼器 

分 类 号：O328[理学—一般力学与力学基础]