这几个是我做的,显示实现了,但就是不成功,为什么总是有错误
ERROR # 722 FROM SUBROUTINE chkrbe2
An invalid rigid element.
This RBAR is not connected with any structural element.
RBAR element id = 2103
independent grid id = 2287
dependent grid id = 2286
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.