Modelling and Prediction of Lifetime of Metal Rubber Isolator Under Random Vibration

Through fatigue experiments of ring-like metal rubber (MR) isolator under random vibration load, the effects of parameters, including relative preload of metal rubber isolator, wire diameter and relative density, on isolator’s lifetime are investigated. The models to describe the relationship between the lifetime and these parameters are proposed to predict the lifetime of MR isolators. An orthogonal experimental design is proceeded to evaluate the contribution of these parameters to the fatigue life of isolators, and the coefficients and functions related to the multi-parameter model are achieved experimentally. The conclusions derived from the experiments provide a new way for designer to predict the working lifetime for the MR isolators in application.