摘要
由于传统的混合控制隔振平台在竖直、水平两个方向上存在相互制约作用,从而增加了其在实际工程应用中的难度。因此首先建立了一种对竖直和水平方向双向解耦的新型混合控制隔振平台,将其置于搭建的三层结构厂房模型中,通过数值仿真对比分析了无控制结构楼板和被动隔振平台的响应,验证了该平台模型的合理性和可配置性。在此基础上,对比分析了考虑平台与结构一体化作用对时程响应控制的影响,结果表明,对于精度要求较高的微振动控制,运用双向解耦隔振平台可以大大简化控制设计系统,同时考虑一体化控制有利于进一步深化及优化控制设计。最后运用三分之一倍频程谱对无控、被动及混合控制的速度响应进行频域分析,结果表明该混合控制方案可以有效实现全频域振动的隔离。
For the traditional hybrid control vibration isolation platform,because of the interaction between the vertical direction and the horizontal one,it becomes difficult to be applied in practical engineering.Thus,in this paper a new vibration isolation platform is firstly proposed,for which,the two directions are uncoupled and the platform is then set to a three story factory model.And the numerical analysis is done for the uncontrolled structural floor response and the passive control isolation platform response to verify the reasonableness and configurability of the model.Then,the comparative analysis is done,through which,the influence of the integration control of the platform with the coupling structure upon the time history response is disclosed.The results show that for the high precision micro-vibration control,the double-direction decoupling platform can greatly simplify control design system and the integration control is conducive to further deepening and optimal control design.Finally,one-third octave spectrum is used to analyze the response of the velocity under uncontrolled,passive and hybrid control in the frequency domain,the results show that the hybrid control scheme can achieve full frequency vibration isolation.
出处
《振动工程学报》
EI
CSCD
北大核心
2012年第2期174-180,共7页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51078119
50578058)
关键词
混合控制
隔振平台
时程响应
解耦
三分之一倍频程谱
hybrid control
vibration isolation platform
time history response
decoupling
one-third octave spectra
