Theoretical and experimental analysis on impact resistance of metal rubber vibration isolator

Metal rubber is recognised as an innovative high-efficiency damping material with excellent damping characteristics and energy dissipation capabilities, enabling effective vibration control. In this study, the focus is on the static characteristics and vibration damping performance of metal rubber vibration isolators under impact loads. Quasi-static test results demonstrate significant hysteresis and nonlinear stiffness properties in metal rubber, with its performance significantly influenced by relative density and wire diameter. The vibration isolating performance of metal rubber vibration isolators can be effectively evaluated using the impact isolation coefficient and logarithmic decrement rate. Impact tests reveal that metal rubber vibration isolators with varying relative densities and wire diameters exhibit distinct energy dissipation behaviours. Metal rubber samples with minimum wire diameter and maximum relative density demonstrate excellent vibration isolation performance at a pre-compression of 2 mm. This provides a new damping solution for applications in heavy machinery impact scenarios.