Construction and study on dynamic performance of a novel nonlinear energy sink under transient excitation

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (11) : 55-60.

LIU Hai-ping1,2, WANG Yao-bing1,2

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Abstract

A single Euler beam was taken as a nonlinear stiffness element and its theoretical model was established under a fixed-fixed boundary condition. A nonlinear energy sink with an approximate pure cubic stiffness was constructed effectively ignoring the effect of linear stiffness on output stiffness of a single Euler beam to suppress effects of carrier rocket’s transient loads on space-borne equipment within active launch duration. A multi-DOF system’s dynamic model including structural plate, space-borne device and nonlinear energy sink was built. Using the established model, numerical simulation was conducted to investigate the nonlinear energy sink’s performance according to vibration absorption and energy transfer features among components of the system. The results showed that a nonlinear energy sink being applicable in engineering is constructed successfully using a single Euler beam; the initial condition to excite a target energy transfer is deduced.

Key words

nonlinear energy sink / transient excitation / Euler beam / target energy transfer

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LIU Hai-ping1,2, WANG Yao-bing1,2. Construction and study on dynamic performance of a novel nonlinear energy sink under transient excitation[J]. Journal of Vibration and Shock, 2018, 37(11): 55-60

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