新型非对称惯容NES减震控制性能研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (2) : 116-125.

论文

新型非对称惯容NES减震控制性能研究

刘志彬1,2,3,4，谭平1,2,3,4，王菁菁1，陈洋洋2,3,4

作者信息 +

Performance analysis of a novel asymmetric inerter NES for seismic response mitigation

LIU Zhibin1,2, 3,4，TAN Ping1,2,3,4，WANG Jingjing1，CHEN Yangyang2,3,4

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文章历史 +

摘要

为提高控制装置的减震性能及减小附加阻尼器的质量，基于非对称非线性能量阱（nonlinear energy sink ，NES）提出一种附加惯容器的新型控制装置——非对称惯容NES。根据非对称惯容NES系统的工作原理推导出运动方程；在脉冲型荷载作用下进行控制参数数值优化，分析非对称惯容NES的能量鲁棒性和频率鲁棒性。分析地震作用下结构与控制装置响应，研究主体结构刚度变化前后的控制性能。应用数值小波变换对体系的地震响应时程进行功率谱分析，从能量的角度研究控制装置的减振机理。研究结果表明，非对称惯容NES具有极强的能量鲁棒性和频率鲁棒性，在地震作用过程中能有效减小顶层加速度峰值且所需行程更小，能在更广频域内与主体结构发生共振，因而其减震效率更高。非对称惯容NES减震控制性能与已有的非对称NES相当甚至更优，并能够减小40%阻尼器质量，在实际应用中具有更广阔的前景。

Abstract

This paper proposes a novel asymmetric inerter nonlinear energy sink(NES), which is composed of an asymmetric NES and an inerter element, to reduce the mass of dampers and improve the seismic mitigation performance of NES. The working principle of asymmetric inerter NES was presented, and the equations of motion of asymmetric inerter NES-attached system are derived. Asymmetric inerter NES is optimized under impulsive excitations to analyze the energy and frequency robustness of the proposed asymmetric inerter NES. Control performance and wavelet spectrum analysis of Asymmetric inerter NES under the action of earthquakes. Numerical results show that the proposed asymmetric inerter NES is as effective as asymmetric NES in response mitigation under seismic excitations and exhibits strong robustness against changes in both the energy level and the structural frequency but asymmetric inerter NES is preferred with a much smaller stroke demand and reduces the mass of dampers. Therefore, Asymmetric inerter NES demonstrates great potential as an effective control strategy for seismic response mitigation of building structures.

导出引用

刘志彬1,2,3,4，谭平1,2,3,4，王菁菁1，陈洋洋2,3,4. 新型非对称惯容NES减震控制性能研究[J]. 振动与冲击, 2023, 42(2): 116-125

LIU Zhibin1,2, 3,4，TAN Ping1,2,3,4，WANG Jingjing1，CHEN Yangyang2,3,4. Performance analysis of a novel asymmetric inerter NES for seismic response mitigation[J]. Journal of Vibration and Shock, 2023, 42(2): 116-125

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