Abstract
In this paper we present some results of a theoretical study of stationary random oscillations of an engine mounting system with motion-limiting stops. The dynamic model of the vehicle is reduced to a two degree-of-freedom system with stops which limits the relative motion of the engine body to the vehicle. The nonlinear impact force model is statistically reduced to a spring-damper model with equivalent linear coefficient of stiffness and damping between two masses. The response of the system to a roughness input of a roadway with Gaussian probability distribution is determined from the Fokker-Planck equation. Results are given for mean-squared level of the response. The accuracy of the theoretical approach is investigated by means of numerical simulations.
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