弹性限位浮筏系统的随机振动建模与算法

对具有弹性限位的浮筏隔振系统，采用单边约束动力学方程，引入接触力，建立系统的确定性方程。再设系统的激励受随机因素的影响，导出系统的随机离散动力学模型，给出离散的计算格式。由于浮筏系统中限位器的个数很多，系统受冲击后，限位器接触状态的可能性非常多，因此对于限位器的接触状态的判别采用了人工神经网络，使得接触计算得以实现。最后通过实例分析对系统的随机动力学特性进行分析，给出噪声对系统振动周期性的影响，以及限位器间隙与位移方差之间的关系。

Stochastic vibration model and algorithm for a floating raft with elastic limiters

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...