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| Track nonlinear energy sink attached to a high-rise building for response mitigation |
| WANG Jingjing1, LI Haobo2, LIU Zhibin1 |
| 1.School of Civil Engineering, Guangzhou University, Guangzhou 510006, China; 2.College of Civil Engineering,Hunan University of Technology,Zhuzhou 412000,China |
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Abstract Track nonlinear energy sinks (track NESs) are a type of passive structural control devices that can mitigate the vibration of a primary structure with a nonlinear restoring force.This nonlinearity is generated by the motion of the NES mass on a specially designed track.The nonlinear restoring force of track NESs and the equations of motion for control systems were analytically constructed.Parameters optimization was carry out for the track NES when attached to a 32 degrees of freedom primary structure.The optimized track NES performs effectively in response reduction and demonstrates better robustness against the changes of the device stiffness than the conventional TMD.The track NES is, however, sensitive to the changes of the device damping.To address this issue, single-sided vibro-impact track energy sinks（SSVI track NESs）were proposed.The control performance of the SSVI track NES was investigated in consideration of the effects of device stiffness and damping.The results show the SSVI track NES is able to effectively mitigate structural responses with improved robustness against the changes of device stiffness and damping.
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Received: 17 October 2018
Published: 28 April 2020
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