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The Effect of Nonlinear Isolator on Diesel Engine Vibration Isolation System

A flexible isolation system of diesel engine was modeled to deeply study the effect of nonlinear isolators on the system response, and some cases of two-layer isolators were analyzed in ADAMS. The results show that when there are only the upper isolators with nonlinearity, the acceleration of engine block is decreased by 18.75% than that with linear isolators, and the acceleration of middle raft is decreased by 66.96% at the same time. However, when only the lower isolators are nonlinear, the acceleration of engine block is increased by 53.13%, and the acceleration of raft is decreased by 90.44%. The performance of system with all nonlinear isolators is similar to that of system only with upper nonlinear isolators.