天棚半主动惯容隔振器动态特性研究

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摘要基于“惯容-弹簧-阻尼”的三元件并联式被动惯容隔振器能进一步拓宽传统线性隔振器的隔振频带，但高频隔振性能显著恶化，为此提出基于天棚惯容控制的半主动惯容隔振器以改善高频隔振性能。天棚惯容控制策略采用基于绝对-相对加速度切换控制来调整半主动惯容器的惯质系数在最大与最小值之间切换，以近似模拟理想天棚惯容器的力学特性。研究天棚半主动惯容隔振器在基础简谐位移激励下的动态特性，通过平均法求解系统的近似解析解，并用数值解进行验证。结果表明与被动惯容隔振器相比，天棚半主动惯容隔振器的绝对位移峰值和传递率峰值更低，隔振频带更宽，高频绝对位移传递率明显降低，具有显著优势。

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关键词 ：隔振器, 半主动惯容器, 天棚惯容控制, 动态特性

Abstract：The 3-element parallel passive inerter-based vibration isolator based on “inerter-spring-damping” can further broaden vibration isolation frequency band of traditional linear isolator, but its high-frequency vibration isolation performance deteriorates significantly. Here, a semi-active inerter-based vibration isolator based on the skyhook-inertance control was proposed to improve its high-frequency vibration isolation performance. The skyhook-inertance control strategy used the absolute-relative acceleration switch control to switch the inertance of the semi-active inerter between its maximum and minimum values, and approximately simulate the mechanical property of the ideal skyhook inerter. Dynamic characteristics of the semi-active inerter-based vibration isolator under base harmonic displacement excitation were studied. The average method was used to solve the approximate analytical solution to the system, and it was verified using the numerical solution. The results showed that compared with the passive inerter-based vibration isolator, the semi-active inerter-based vibration isolator has lower absolute displacement peak value, lower transmissibility peak value and wider vibration isolation frequency band; the latter’s high frequency absolute displacement transmissibility drops obviously, it has a significant advantage over the former.

Key words： vibration isolator semi-active inerter skyhook-inertance control dynamic characteristics

收稿日期: 2020-05-13 出版日期: 2021-08-15

引用本文:

唐锋，王勇，丁虎，陈立群. 天棚半主动惯容隔振器动态特性研究[J]. 振动与冲击, 2021, 40(15): 65-72.
TANG Feng, WANG Yong, DING Hu, CHEN Liqun. Dynamic characteristics of skyhook semi-active inerter-based vibration isolator. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(15): 65-72.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I15/65

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