Abstract:In this paper, for the floating raft with elastic limiters, using the unilateral kinetics equations, the deterministic model is established through adding the contact force. Supposing the external force of system is effected by the white noise. It is necessary to establish the random dynamical model for the system. Considering the universality of the noise, based on the random vibration theories a stochastic non-smooth model of the floating raft with elastic limiters is built up and the discrete computing formats are derived. There are many limiters in the floating raft system. So, it is difficult to determine the contact configurations of limiters. The artificial neural network can be used to dingtinguish the contact state of elastic limiters. The random responses of the floating raft have been analyzed by example. It is obtained that the effect of vibration by noise and the relations between the displacement variance and the gap of limiters.