Theoretical study of the effects of nonlinear viscous damping on vibration isolation of sdof systems
Theoretical study of the effects of nonlinear viscous damping on vibration isolation of sdof systems
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DOI：
10.1016/j.jsv.2009.01.001
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发表时间：
2009-06-05
影响因子：
4.7
通讯作者：
Peng, Z. K.
中科院分区：
文献类型：
--
作者：
Lang, Z. Q.;Jing, X. J.;Peng, Z. K.
本文从理论上分析了非线性粘滞阻尼对单自由度系统隔振效果的影响。应用作者最近提出的输出频率响应函数（OFRF）的概念，研究了单自由度隔振器的传递率与三次粘性阻尼特性参数的关系。理论分析表明，三次非线性粘性阻尼可以产生理想的隔振，使得只有共振区域被修改的阻尼和非共振区域保持不受影响，无论施加到系统的阻尼水平。仿真研究结果验证了分析的有效性和工程意义。这项研究工作具有重要意义的分析和设计的粘滞阻尼隔振器的广泛的实际应用。(C)2009爱思唯尔有限公司版权所有。
The present study is concerned with the theoretical analysis of the effects of nonlinear viscous damping on vibration isolation of single degree of freedom (sdof) systems. The concept of the output frequency response function (OFRF) recently proposed by the authors is applied to study how the transmissibility of a sdof vibration isolator depends on the parameter of a cubic viscous damping characteristic. The theoretical analysis reveals that the cubic nonlinear viscous damping can produce an ideal vibration isolation such that only the resonant region is modified by the damping and the non-resonant regions remain unaffected, regardless of the levels of damping applied to the system. Simulation study results demonstrate the validity and engineering significance of the analysis. This research work has significant implications for the analysis and design of viscously damped vibration isolators for a wide range of practical applications. (C) 2009 Elsevier Ltd. All rights reserved.