期刊
JOURNAL OF VIBRATION AND CONTROL
卷 20, 期 15, 页码 2314-2325出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1077546313484049
关键词
Low-frequency vibration; quasi-zero-stiffness; transmissibility; vibration isolator
资金
- National Natural Science Foundation of China [11102026, 11072075, 51009143]
- Specialized Research Fund for the Doctoral Program of Higher Education [20110161120040]
- State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body [71075004]
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 0.5Hz, while the latter can only execute attenuation after 4.2Hz. The QZS system is especially effective for vibration isolation in the low-frequency range.
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