接触求解不收敛问题

lingke125

我定义了三个接触对，经过CNCHECK命令检测三个接触对均为CLOSED。并出错如下：

1.*** WARNING ***   SUPPRESSED MESSAGE    CP =     120.703   TIME= 17:24:04
Contact element 21046 (real ID 3) status changes abruptly from contact   (with target element 21012) -> no-contact.

2.*** ERROR ***     SUPPRESSED MESSAGE    CP =     214.500   TIME= 17:25:52
The value of UZ at node 18 is 3.912076997E+25.  It is greater than the   current limit of 1.E+25.  This generally indicates rigid body motion     as a result of an unconstrained model.  Verify that your model is
properly constrained.

3.*** ERROR ***     SUPPRESSED MESSAGE    CP =     214.500   TIME= 17:25:52
*** 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 check contact  status in the SOLUTION module for the converged solutions using
CNCHECK.                                                               

4.. *** WARNING ***   SUPPRESSED MESSAGE    CP =     214.500   TIME= 17:25:52
The unconverged solution (identified as time 0.20000001 substep 999999)  is output for analysis debug purposes.  Results should not be used for  any other purpose.  

请各位高手帮忙解决下，不甚感谢！

lannychan

sol' control/nonlinear/

用cutcontrol,lab,value 修改value值

huright

很明显你的载荷或者材料常数或者模型有问题

nanfeng520

我在计算的过程中也有第一个问题，调整FKN就好了

ymcheng123

第二个问题出现原因可能是你的模型约束有问题