求助：大侠们看看我的问题是什么

烟花开

我在做接触分析计算的时候，在运行后，会提示我这样的错误：The value of UZ at node 6661 is 2.384930627E+09.  It is greater than   
the current limit of 1000000.  This generally indicates rigid body      
motion as a result of an unconstrained model.  Verify that your model   
is properly constrained.                                                

*** ERROR ***                           CP =     187.203   TIME= 14:01:29
*** MESSAGE CONTINUATION ---- DIAGNOSTIC INFORMATION ***               
If one or more parts of the model are held together only by contact     
verify that the contact surfaces are closed.  You can use the CNCHECK   
command to check the initial contact status in the SOLUTION module.  
我也感觉到把约束什么的都加好了，不知道为啥，还望大侠们帮忙解疑，多谢万分！！！！！！！！！！！！！！！！！！！！！！！！！！！ :hug:

stardreams

from my experience, there are three possible reasons for this error message:
1. the initial contact status is open
2. the model is not properly constrained
3. if nonlinear material is considered, the message may indicate that yielding of material has occurred resulting in a large displacement for a small load increment.

you may try the following steps:
1. check contact status (in GUI: contact manager>contact pair>check contact status, in command window input: CNCHECK) to see whether the contact pairs are initially closed.
2. if all the contact pairs in your model are initially closed, try to double check the constraints of the model.
3. if you have considered material nonlinearity or buckling in your model,  check whether the material has yield or buckling occurred

烟花开

ok,谢谢啊，我先去检查一下看看，希望有问题时还能请教你，谢谢啊