单边碰振轨道非线性能量阱减震性能研究

Seismic Performance Study on Nonlinear Energy Sinks of the Single-Sided Vibro-Impact Track

为了研究单边碰振轨道非线性能量阱(SSVI轨道NES)的减震性能,先对附加于一三自由度主体结构的SSVI轨道NES系统进行公式推导和优化,再对SSVI轨道NES系统分别施加脉冲型荷载和地震作用进行数值模拟,并与调谐质量阻尼器(TMD)、轨道非线性能量阱(轨道NES)和锁住系统进行对比。研究结果表明,SSVI轨道NES系统的频率鲁棒性优于TMD系统,能量鲁棒性优于轨道NES系统,展现出良好的减震性能。

A study of the seismic response reduction has been conducted on the single-sided vibro-impact track NES.Firstly,the derivation of formula deduction and optimization can be achieved of the single-sided vibro-impact track NES system when attached to a three-degree-of-freedom main body structure.Secondly,numerical simulations of the SSVI track NES system are to be carried out by impulsive loading and seismic action respectively,followed by a comparison with the tuned mass damper(TMD),orbital nonlinear energy well(track NES)and the locking system.The research results show that the SSVI track NES exhibits an improved robustness performance compared with that of the tuned mass damper(TMD),with its energy robustness better than that of the track NES system,thus verifying its good seismic properties.