请教,这2个warning有什么区别?

hchzh2000

www.caenet.cn上看到这个
看看这个问题  怎么解决
谢谢

请问各位:这2个warning有什么区别?谢谢!

1:***WARNING: NODES 4001 AND 101 IN THE TIE MPC ARE NOT COINCIDENT.  THE MPC
             WILL CONSTRAIN ROTATIONAL RIGID-BODY MOTION BETWEEN THE NODES.  
             INTERPRET RESULTS WITH CAUTION OR CONSIDER SUBSTITUTING A BEAM OR
             LINK MPC.

2:***WARNING: AN MPC OF TYPE TIE RELATES AT LEAST TWO NODES WHICH, DUE TO
             ELEMENT REMOVAL, HAVE NO STIFFNESS IN STEP 1. THIS MPC WILL NOT BE
             ACTIVE DURING THIS STEP OF THE ANALYSIS. (THE DEPENDENT NODE IS
             21000025, AND TWO NODES WITH NO STIFFNESS ARE 21000025 AND
             20000025.)


http://www.caenet.cn/forums/righ ... 8&CurrentPage=1

zhangmeng

好像是两个节点间定义的约束关系错了!
建议你检查tie中定义的关系！
（变形协调方程）