A parametric study of single-sided vibro-impact track nonlinear energy sink for seismic response reduction

被引：0

作者：

Wang J. ^{[1
]}

Hao W. ^{[2
]}

Lü X. ^{[3
]}

机构：

[1] School of Civil Engineering, Guangzhou University, Guangzhou

[2] College of Civil Engineering, Hunan University of Technology, Zhuzhou

[3] State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 16期

关键词：

Nonlinear energy sink; Numerical simulation; Parametric optimization; Seismic control; Shake table test;

D O I：

10.13465/j.cnki.jvs.2019.16.010

中图分类号：

学科分类号：

摘要：

Track nonlinear energy sinks (Track NESs), a type of passive energy dissipation device featuring an auxiliary mass which moves along a specially shaped track, can reduce structural responses with their nonlinear restoring force. By adding an impact surface on one side of the moving direction of the existing track NES, a single-side vibro-impact (SSVI) track NES was proposed in this work. Due to the discontinuous surge of force during the impacts, the SSVI track NES processes even stronger nonlinearity than the track NES, and thus was more effective in reducing the structural response. The SSVI track NES was analytically and numerically optimized and verified by shake table tests when attached to a two degree-of-freedom primary structure. The initially-optimized SSVI track NES performs effectively when subjected to impulse excitations. The performance of the SSVI track NES under seismic excitations can be further improved by a secondary optimization on impact-related parameters. To this end, the coefficient of restitution and the clearance between the impact surface and the NES mass were further investigated. The results show that by simply changing those parameters, the seismic performance is enhanced considerably. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：64 / 70

页数：6

共 9 条

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