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

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (3) : 127-133.

YAO Hongliang, LIU Shuai, WANG Yuwei, WEN Bangchun

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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.

Key words

bi-stable nonlinear energy sink / cantilever beam system / vibration suppression / target energy transfer

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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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