磁流变式调谐液柱阻尼器对结构风致抖振控制研究  

Magnetorheological tuned liquid column damper (MR-TLCD) for wind-induced buffeting control of structures

作　　者：孙洪鑫[1] 陈政清[1] 王修勇[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《振动工程学报》2008年第3期255-260,共6页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(50578063)

摘　　要：磁流变式调谐液柱阻尼器(MR-TLCD)是由调谐液柱阻尼器(TLCD)和磁流变液阻尼器(MRD)组成的新型半主动控制装置。建立了含有半主动控制力项的MR-TLCD力学模型以及MR-TLCD与单自由结构耦合运动方程,等效线性化处理了MR-TLCD力学方程中的非线性阻尼项。采用谱分析方法研究了MR-TLCD对单自由结构风致抖振情况下控制效果。研究结果表明,在质量比和频率比一定的情况下,MR-TLCD能够通过只改变外接电源进而改变MR-TLCD阻尼力即可实现良好的优化减振性能。且加速度控制效果优于位移控制效果。Magnetorheological tuned liquid column damper （MR-TLCD） is a promising device for vibration control, which consists of tuned liquid column damper （TLCD） and Magnetorheological damper （MRD） as its name implies. The mechanical model of MR-TLCD with the semi-active control force and the equations of motion for the coupled system of MR-TLCD- structure were formulated in this paper and its nonlinear damping force was approximated by means of the equivalent damping linearization in solution. Wind-induced buffeting response of a single-degree-of-freedom structure with MR-TLCD was obtained by spectrum analysis method. For a fixed mass ratio and frequency ratio, the MR-TLCD was shown to be capable of achieving favorable vibration mitigation capability through adjusting damping force of MR-TLCD by external electrical current. The control performance of the acceleration was better than that of displacement.

关 键 词：磁流变式调谐液柱阻尼器 动力模型 风致抖振 谱分析 振动控制 

分 类 号：TU311.3[建筑科学—结构工程]