An adaptive strategy for reducing stroke of tuned mass dampers with variable degrees of freedom
This paper presents an adaptive strategy to deal with the stroke problem of tuned mass dampers(TMD)by switching this device between a single TMD and series multiple TMDs(SMTMD).A conventional TMD is a mass attaching to the primary structure with a spring and a viscous damper,dissipating vibration energy with motions of TMDs mass(stroke).Thus,the limitation of stroke in TMDs spring and damper confines the scope of applicability.On the other side,an SMTMD consists of multiple interconnected TMDs with only the first one attaching to the primary structure.This device can achieve the similar control efficiency with smaller strokes between TMD units compare to a single TMD.However,it is not as effective as that of a single TMD in reducing structural response.Therefore,this study presents an adaptive strategy to switch the device between a TMD and a SMTMD regarding the stroke as a switching index.The used parameters of a single TMD were obtained by conventional optimization method,while SMTMDs with different parameter sets were studied to find an optimal SMTMD that makes the switching reasonable and practical.Comparing to a single TMD or an SMTMD of a fixed type,numerical simulations show that the proposed strategy results in smaller stroke demand so that it is more adaptive to a larger excitation event.
Tuned mass dampers series multiple tuned mass dampers earthquake engineering vibration control adaptive control
J.F.Wang C.Lo C.C.Chang
Department of Civil and Disaster Prevention Engineering,National United University,Miaoli,Taiwan National Center for Research on Earthquake Engineering,National Applied Research Laboratories,Taipei
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
763-772
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）