顺风向脉动风载下巨子型结构振动控制研究  

Investigation to control force in the mega-sub controlled structure subjected to along-wind loads

作　　者：连业达[1] 张洵安[1] 王朝霞 

机构地区：[1]西北工业大学力学与土木建筑学院,陕西西安710072 [2]煤炭工业部西安设计研究院,陕西西安710054

出　　处：《振动工程学报》2007年第6期647-651,共5页Journal of Vibration Engineering

基　　金：西工业大学研究生创业种子基金资助(Z200729);西北工业大学科技创新基金资助(M450211)

摘　　要：基于对顺风向脉动风载下子结构质量和附加阻尼研究,探讨巨子型有控结构(M SCS)中的两种控制作用——调谐减震与阻尼耗能减震及两者间的关系。研究了不同附加阻尼时子结构质量变化对M SCS动力响应的影响规律,及子结构质量不同情况下附加阻尼值变化对M SCS动力响应的影响规律,并分析子结构质量对M SCS中最优附加阻尼值的影响。结果表明:M SCS动力响应随着子结构质量增大而减小,且该规律不受附加阻尼变化干扰;M SCS侧移或加速响应随着附加阻尼增大呈现出先减小后增大或不变的变化规律,且该规律不因子结构质量不同而改变,但最优附加阻尼值随子结构质量增大而减小。实际设计中为充分发挥M SCS抗风振潜能,要综合考虑子结构质量与附加阻尼的影响。In the mega-sub controlled structure （MSCS）, there exist simultaneously two controlling techniques, i.e. tuned vibration-absorption and energy-dissipation of damping. The relations between the two techniques and their effects on shock-re- sistant performance of MSCS are examined. First, under along-wind loads, the effect rules of sub-structural mass to dynamical responses of MSCS with different additive damping are studied. Additionally, the effect rules of additive damping to dynamical responses of MSCS with different sub-structural mass are investigated, and the effect of sub-structural mass on the optimum additive damping is analyzed. Results show that dynamical responses of MSCS drop with sub-structural mass rising and this rule has nothing with additive damping. With additive damping increasing, all the displacement responses of MSCS with different sub-structural mass descend first, and then rise. And the value of the optimum additive damping becomes small as sub-structural mass increases. Therefore, the two controlling techniques should be synthetically considered in actual design, to exert adequately the shock-resistant potential of MSCS.

关 键 词：巨子型有控结构 TMD控振原理 耗能减震作用 

分 类 号：TU311[建筑科学—结构工程] TU208