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

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.