含三次非线性阻尼特性的分子弹簧隔振系统

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (11) : 171-175.

论文

含三次非线性阻尼特性的分子弹簧隔振系统

余慕春陈前

作者信息 +

Molecular spring isolation system with cubic nonlinear damping

YU Mu-chun CHEN Qian

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文章历史 +

摘要

对含有三次非线性阻尼特性的分子弹簧隔振系统的隔振性能进行了仿真研究和理论分析。分子弹簧隔振器是一种具有高静低动刚度特性的新型隔振器，将MR阻尼器和分子弹簧隔振器并联，并对MR阻尼器实施PI反馈控制来模拟指定的三次非线性阻尼特性，得到兼具高静低动刚度特性和非线性阻尼特性的隔振系统。通过动力学仿真和理论分析研究了三次非线性阻尼特性对分子弹簧隔振系统的隔振性能的影响，通过谐波平衡法深入分析三次阻尼特性的隔振机理。结果表明：三次非线性阻尼特性适用于隔力，可有效抑制共振峰值同时不改变隔振频率区的隔振性能，而三次阻尼特性不适合于隔幅。

Abstract

The present study is concerned with the theoretical analysis and simulation of the effects of nonlinear viscous damping on vibration isolation of molecular spring isolation systems. Molecular spring isolator is a novel vibration isolator which has high-static-low-dynamic stiffness property. To build the nonlinear vibration isolation system, an MR damper is put in parallel with molecular spring isolator and PI feed-back control is used to realize the desired cubic damping property. Simulation is conducted to study the influence of cubic damping on vibration isolation. After that, the vibration isolation mechanism of cubic damping is analyzed by harmonic balance method. The research reveals that, for force transmissibility, only resonant region is modified by cubic damping and the non-resonant region remains unaffected. However, no similar properties of cubic damping can be found for displacement isolation.

导出引用

余慕春陈前. 含三次非线性阻尼特性的分子弹簧隔振系统[J]. 振动与冲击, 2017, 36(11): 171-175

YU Mu-chun CHEN Qian. Molecular spring isolation system with cubic nonlinear damping[J]. Journal of Vibration and Shock, 2017, 36(11): 171-175

参考文献

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