柔性体替换刚性体
在用传动轴的柔性体替换刚性体时，原先很顺利的仿真出现了如下界面，请问是什么原因？警告: FLEX_BODY 1:
Attachment node 1696 has zero rotational mode shapes for all active modes.
The flexible body may behave more rigid than expected if the node is constrained.
警告: FLEX_BODY 1:
Attachment node 1696 has zero rotational mode shapes for all active modes.
The flexible body may behave more rigid than expected if the node is constrained.
你输出弹性体的时候用自由模态，试试。
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