复杂非线性隔冲减振系统计算分析

基于结构动力学理论，提出了一种用于分析计算复杂非线性隔冲减振系统的双模型两步计算法。该方法将冲击振动分成2个阶段：冲击作用阶段和自由振动阶段。冲击作用阶段，采用两自由度模型进行响应计算，该两自由度模型可有效地解决基础冲击输入问题；自由振动阶段，采用单自由度模型进行响应计算，设备在该阶段以冲击终了时刻的速度和位移为初始条件进行振动。文中还对一个典型的复杂非线性系统的冲击过程进行了数值计算．该方法亦可用于线性隔冲减振系统的计算分析．

A practical method for calculating complexity shock-isolating system with nonlinear stiffness

Based on the dynamics of structure, this paper presented a pratical method of two steps by double model for calculating the complexity shock-isolating system with nonlinear stiffness. The whole process was devided into shock action phase and free vibration phase. In the shock action phase, the response was calculated by using double DOF model which could effectively treat with the foundation shocking boundary condition. In the free vibration phase, the response was calculated by adopting single DOF system which replaced initial conditions with the displacements and velocities of the final moment in the shock action phase. A shocking numerical process with typical complexity nonlinear system was analyzed. This method can also be used in the linear shock-isolating system.