可调永磁双稳态非线性能量阱及应用研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (3) : 127-133.

论文

可调永磁双稳态非线性能量阱及应用研究

姚红良，刘帅，王钰玮，闻邦椿

作者信息 +

Adjustable permanent magnet bi-stable nonlinear energy sink and its application

YAO Hongliang, LIU Shuai, WANG Yuwei, WEN Bangchun

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文章历史 +

摘要

为了实现对主系统的宽频振动抑制，研发了一种可调的双稳态非线性能量阱(BNES)。介绍了BNES的结构和工作原理；其次分析了BNES的刚度构成以及其非线性动力学特性，并建立了悬臂梁-BNES系统动力学微分方程；采用数值方法探究了不同磁铁间距时的BNES对悬臂梁瞬态时域振动抑制效果和稳态频域的宽频抑振能力；对两组不同的悬臂梁系统进行了实验，验证了不同磁铁间距时的双稳态非线性能量阱的宽频振动抑制能力。研究结果表明，该BNES对悬臂梁的瞬态时域响应和稳态频域响应都有很好的振动抑制能力。

Abstract

In order to realize broadband vibration suppression of main system, an adjustable bi-stable nonlinear energy sink (BNES) was developed.Firstly, structure and working principle of BNES were introduced.Secondly, the stiffness composition of BNES and its nonlinear dynamic features were analyzed, and the dynamic differential equation of a cantilever beam-BNES system was established.Then, the numerical method was used to investigate the suppression effect of BNES with different magnet spacing on cantilever beam’s transient time domain vibration and BNES’s broadband vibration suppression ability in steady state frequency domain.Finally, tests were conducted for two groups of different cantilever beam systems to verify the broadband vibration suppression ability of bi-stable nonlinear energy sink with different magnet spacing.The study results showed that BNES has very good vibration suppression ability for both transient time domain response and steady-state frequency domain one of cantilever beam systems.

导出引用

姚红良，刘帅，王钰玮，闻邦椿. 可调永磁双稳态非线性能量阱及应用研究[J]. 振动与冲击, 2020, 39(3): 127-133

YAO Hongliang, LIU Shuai, WANG Yuwei, WEN Bangchun. Adjustable permanent magnet bi-stable nonlinear energy sink and its application[J]. Journal of Vibration and Shock, 2020, 39(3): 127-133

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