瞬态接触—冲击问题的有限元分析

介绍瞬态接触－冲击问题的一种基于拉格朗日乘子法的有限元公式系统及其数值求解，所建立的接触元能模拟的各个阶段，如分离、会或有摩擦的滑移，对于有摩擦的接触和释放给出了一种简洁的接触－释放条件，为了更有效地求解耦合场运动方程，引了隐式－显式有 元算法，该方法的有效性通过模拟核废料装运桶的冲击响应得到了验证。

Finite Element Analysis for Transient Contact Impact Problems

A finite element formulation based on lagrange multiplier techniques for transient contact impact problems is presented.The developed contact element has the ability to simulate each of the contact stage such as separation,sticking and frictional sliding.For the frictional contacts and releases,a concise formulation of contact release conditions is given.In order to solve coupied field equations of motion more efficiently,the implicit explicit finite element algorithm is also introduced.The vadility of the technique is demonstrated by simulating impact response of axisymmetric spent nuclear fuel shipping cask.