It's a nearly elastic collision and it bounces back from the wall.
它近似于弹性碰撞，它从墙壁反弹。
2
After compared with the result of tests and fitting formula, it is reasonable to deduce the resolution of tube wall stiffness based on the elastic theory.
基于经典弹性板壳理论推导管壁变形解答，得到管壁变形的解析表达式，并以此计算管壁变形刚度。
3
Use of imaginary elasticwall method to simulate the action of moving particle's on the wall of vessel at balance state was suggested.