建立模型时 PART 与 PART 之间有初始穿透导致的

<span style="text-align: justify; color: #555555; text-transform: none; text-indent: 28px; letter-spacing: normal; font-family: "Open Sans", "Microsoft YaHei", 微软雅黑, Helvetica, Arial, "Lucida Grande", Tahoma, sans-serif; font-size: 14px; font-style: normal; font-weight: 400; word-spacing: 0px; float: none; display: inline !important; white-space: normal; orphans: 2; widows: 2; background-color: #FFFFFF; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">在LS-Dyna中经常遇到滑动界面能（sliding interface energy）为负值的情况，有两种情况会导致负的滑动界面能：基于段的映射和初始穿透可以查看这个帖子<a href="http://www.leanwind.com/archives/5238.html">http://www.leanwind.com/archives/5238.html</a>