Dynamic viscoelastic analysis and experiment of an aerospace silicone rubber damper based on DMA test.

The silicone rubber dampers are widely used in aerospace equipment because of the advantages such as the small size, the width damping frequency and the good damping effect at the point of resonance. In order to improve the reliability of anti-adverse environment, a certain type silicone rubber damper was used in an aerospace equipment, whose damping performance and experimental research were presented in this paper as the research object. Firstly, the viscoelastic theory was analysed and the DMA experiment was conducted to obtain the material parameters of silicon rubber dampers. Then the FEM Analytical model of silicon rubber damper was built, and the modal and random vibration were analysed in ANSYS. Compared with the experimental results, the results of FEM analysis are in good agreement. The maximum error of modal simulation results was 2.4%.The results shows that the test data in DMA experiment is accurate and Finite element analysis of silicon rubber dampers is effective. It can provide some guidance for subsequent design, selection and application of silicone rubber damping system.