圆环在横向冲击荷载作用下的瞬态响应的UL格式有限元数值模拟

UL FEM SIMULATION OF TRANSIENT RESPONSES OF RINGS UNDER LATERAL IMPACT LOADS

本文采用修正的Lagrangian格式(UL格式)有限元中心差分算法,对圆环在横向冲击荷载作用下的瞬态响应进行数值模拟。采用一阶自适应技术,处理冲击接触面和网格失稳现象。具体算例表明了本文处理方法的合理性。

Considering the large-scale deformation of rings, the transient responses of rings under several types of lateral impact loads are simulated with a code which is based on a UL FEM central-difference algorithm in the present paper. In this code developed by authors, the one-order self-adaptive idea is employed in dealing with Mesh instability and contact-impact interfaces.