EXCITE PU活塞缸套动力学分析计算过程计算发散的问题处理？ 20

我用EXCITE PU做活塞缸套动力学计算是发散：

结果显示：the relative displacement between two bodies is too large！

                 User action：（a）check the initial distances of the connected bodies.

                                        (b)  check the initial positions of the connected bodies.

                                        (c) if this error occures not occures at the beginning of the simulation,check in the animation of the problem the motion behaviour of the connected bodies。

动画显示活塞裙部部分节点跑出。不知道具体是哪里出现了问题，希望有经验的大神指导讨论一下，谢谢