用radioss做模态分析时候出错

meliuyang1018

我用2D—connector—seam单元连接钢板，运行的时候出现如下错误，大神们帮我看看怎么回事？出错的单元怎么找出来啊？
*** ERROR #  722 ***
  An invalid rigid element.
  This RBAR is not connected with any structural element.
      RBAR element id =         25
  independent grid id =         52
    dependent grid id =         51
  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.
  ...

感谢大家了，急用啊

hongyuwu86

没有合并节点？