Abstract:

The finite element model of silicon rubber absorbers is established. Applying the natural frequency as a criterion, a reliable nonlinear transient analysis method and a silicon rubber hyperelastic constitutive model are used to analyze the dynamic characteristics. First, the finite element model of the vibration test system was set up. Through the theoretical analysis, the single step Houbolt method was used to calculate the acceleration response of the absorbers corresponding to the commonly used rubber hyperelastic constitutive model, then the Fourier transform was carried out to extract the natural frequency. Second, the natural frequency of the absorbers was measured by vibration test system based on hammering method. The results confirm the reliability of the single step Houbolt method, and the Signiorini model is more reasonable for simulating the dynamic characteristics of silicon rubber material. On this basis, the influence of the axial size and radial size parameters of silicon rubber absorbers on its dynamic characteristics was analyzed, which has provided a theoretical basis for the design and application of silicon rubber absorbers.

摘要：

建立硅橡胶的有限元模型，以固有频率为评判标准，选择可靠的非线性瞬态分析方法以及硅橡胶超弹性本构模型对其进行动态特性分析。首先建立减振系统的有限元模型，通过理论分析，选用单步Houbolt法计算了常用的橡胶超弹性本构模型对应的减振器的加速度响应，然后进行傅里叶变换，从而提取出固有频率；接着通过基于锤击法自主研制的振动测试系统进行实验测得减振器固有频率。两者结果比较验证了单步Houbolt法的可靠性，同时表明用Signiorini模型模拟硅橡胶材料的动态特性是更为合理的。在此基础上，分析了硅橡胶减振器轴向尺寸和径向尺寸参数对其动态特性的影响，从而为硅橡胶减振器的设计与应用提供了理论依据。

关键词: 振动与波, 硅橡胶减振器, 非线性动力学, 振动测试系统, 有限元分析, 动态特性