摘要
本文基于FFT多谐波平衡法，对金属橡胶隔振系统响应特性做了深入研究，并引入“平均功率比”对这类非线性隔振系统的振动传递率进行了新的定义。通过分析金属橡胶非线性隔振系统的本构关系，推导了用FFT多谐波平衡法求解系统响应及振动传递率的公式，并通过按数值方法、单一谐波法及多谐波法对给定算例的计算结果对比，说明了FFT多谐波平衡法在求解金属橡胶隔振系统响应及振动传递率时具有较高的精度。理论和分析表明，FFT多谐波平衡法可求解金属橡胶非线性系统响应及振动特性的精确解析解，具有重要的工程应用价值。
Abstract
The dynamic response characteristics of Metal Rubber vibration isolation system was studied by the FFT multi-harmoinc balance method, and the new definition of the nonlinear vibration transmissibility was proposed by introducing the “average power ratio”. Through the analysis of metal rubber nonlinear constitutive relation of vibration isolation system, the response and the vibration transmissibility formula of the system were deduced by using FFT multi-harmonic balance method. Then through the comparisons of the results which calculated by the numerical method, the single harmonic method and the more harmonic method, it shows that the result get by FFT multi-harmonic balance method is much more closer to the numerical solution than the one harmonic balance method. Theory analysis and simulation results show that the FFT multi-harmonic balance method can be used to get the accurate analytical solution of the dynamic response characteristics of the Metal Rubber vibration isolation system, this method will have important application value in engineering.
关键词
FFT多谐波平衡法 /
金属橡胶 /
隔振系统 /
动力学响应 /
传递率
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Key words
FFT multi-harmonic balance method /
Metal Rubber /
Vibration isolation /
Dynamic response /
Transmissibility
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李玉龙;白鸿柏;何忠波;路纯红;李冬伟.
基于FFT多谐波平衡法的金属橡胶隔振系统振动特性分析[J]. 振动与冲击, 2014, 33(15): 98-101
LI Yulong;BAI Hongbai;HE Zhongbo;LU Chunhong;LI Dongwei.
Dynamic Response Characteristics of Metal Rubber Vibration Isolation System by FFT Multi-harmonic Balance Method[J]. Journal of Vibration and Shock, 2014, 33(15): 98-101
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