静力计算时出现问题，急？

wzhwindy

我是一个初学者，最近毕业设计尝试对一个床身进行有限元分析，使用hypermesh自带求解器，但出现下列问题，求指导！

*** INFORMATION #  742
The dependent rotational d.o.f. of this rigid element is removed.
     RBAR element id =     196577
independent grid id =     193554
a dependent grid id =     193553
This is because there is no need to constrain the rotational d.o.f. of
any of the dependent grids.
*** ERROR #  722 ***
An invalid rigid element.
This RBAR is not connected with any structural element.
     RBAR element id =     196578
independent grid id =     193556
   dependent grid id =     193555
Note: If this rigid element is also connected with other rigid elements,
then this error means that there is rigid body mode or mechanism remained
in this rigid element chain due to lack of connected structural elements.

chenhongwei87

rigid的从动点被约束住了

wzhwindy

chenhongwei87 发表于 2013-5-28 15:26
rigid的从动点被约束住了

我是初学者，可以解释具体点吗？我接下来该怎么操作?谢谢。

yhlu

错误里面不是提示了有无效的刚体单元了  

willsimwe

重新建立约束，不要选中从动点