On the analytical and experimental assessment of the performance of a quasi-zero-stiffness isolator

SAGE Publications - Tập 20 Số 15 - Trang 2314-2325 - 2014
Daolin Xu1, Yueying Zhang1, Jiaxi Zhou1, Jingjun Lou2
1State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, College of Mechanical and Vehicle Engineering, Hunan University, China
2Office of Research and Development, Naval University of Engineering, Wuhan, China

Tóm tắt

This paper presents a study of a quasi-zero-stiffness (QZS) isolator. A unique relationship between the geometry configuration and the stiffness of the spring elements is obtained in order to design the property of high-static-low-dynamic stiffness. Analytical solutions of the nonlinear QZS system are derived with the harmonic balance method for the characteristic analysis of the force transmissibility and critical conditions for occurring jump-down and jump-up phenomena. The effects of damping and excitation force on the system behaviors are discussed. A series of experimental tests demonstrate that the QZS system greatly outperforms a corresponding linear isolation system. The former enables vibration to be attenuated at 0.5 Hz, while the latter can only execute attenuation after 4.2 Hz. The QZS system is especially effective for vibration isolation in the low-frequency range.

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SAGE Publications

Tập 20 Số 15

2314-2325

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