考虑涡旋效应的圆柱形TLD多维减震效果研究  

Multi-dimensional seismic control of cylindrical TLD considering vortex effect

作　　者：何浩祥[1] 闫维明[1] 陈彦江[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《振动与冲击》2012年第6期126-130,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(50478042);北京市自然科学基金资助重点项目(8041002)

摘　　要：调谐液体阻尼器可以控制地震作用下的结构动力响应。研究了利用圆柱形调液阻尼器来控制结构在地震作用下的扭转耦联振动。采用薄膜法建立了包含脉冲动压力和对流动压力的调谐液体阻尼器液动压力模型。基于准均匀涡旋理论获得了考虑调谐液体的抗扭力模型。建立了考虑偏心扭转效应的结构控制运动方程。以一装有调谐液体阻尼器的偏心结构为算例,对结构在地震作用下的扭转耦联减震效果进行研究,并分析了调谐液体的脉冲动压力、对流动压力和涡旋抗扭力在减震中的作用。结果表明:合理布置的调液阻尼器能有效控制结构的平-扭耦联振动,不能忽略液体涡旋产生的扭转力。Tuned liquid damper（TLD） can reduce dynamic amplitudes of a structure under earthquake.The seismic control of horizontal and torsional response of a structure with cylindrical TLDs was studied.The hydraulic pressure model of the cylindrical TLD including pulse pressure and convection pressure was established with the membrane analog method.The torsional model of the cylindrical TLD was obtained based on the quasi-uniform vortex theorem.The equation of motion for the control system considering eccentric torsion effect was derived and the solving method was presented.A 10-story eccentric structure with TLDs was analyzed to verify the control performance of TLDs for the horizontal and torsional coupled system under earthquake.The effect of pulse pressure,convection pressure and vortex torsional force was analyzed.The results showed that the coupled response can be reduced effectively and the vortex torsional force can not be ignored.

关 键 词：调谐液体阻尼器 涡旋 液动压力 偏心结构 结构控制 

分 类 号：TU393.3[建筑科学—结构工程] TU311.3