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《Journal of Vibration and Shock》 2011-07
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Stochastic vibration model and algorithm for a floating raft with elastic limiters

WEN Jian-ming,FENG Qi(School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China)  
Here,for a floating raft with elastic limiters,using the unilateral kinetics equations,the deterministic model was established through adding the contact force.Supposing the external force of the system was affected by the white noise.It was necessary to establish the random dynamical model for the system.Considering the universality of noise,based on the random vibration theories,a stochastic non-smooth model of the floating raft with elastic limiters was built up and the discrete computing algorithms were derived.There were many limiters in the floating raft system.So,it was difficult to determine the contact configurations of limiters.The artificial neural network could be used to distinguish the contact state of elastic limiters.The random responses of the floating raft were analyzed with an example.The effect of noise on the vibration of the system and the relations between the displacement variance and the gap of limiters were obtained.
【Fund】: 国家自然科学基金项目(10702051)
【CateGory Index】: TB532
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