单元问题
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我选择单元为plane162 但是在ANSYS/LS-dyna中加载计算之后总是有以下提示，不知道是什么意思，请大神们帮个忙吧！！
*** Error 20211 (STR+211)
reading element card for shell element
undefined node # 384
388 4 454 394 382 384
input phase will continue if possible
*** Warning 21129 (STR+1129)
element aspect ratio of shell element, ID= 49 defined as
area/(longest diagonal)/(longest diagonal) equals: 0.0000E+00
which may be too small to permit a stable calculation.
*** Error 20211 (STR+211)
reading element card for shell element
undefined node # 384
388 4 454 394 382 384
input phase will continue if possible
*** Warning 21129 (STR+1129)
element aspect ratio of shell element, ID= 49 defined as
area/(longest diagonal)/(longest diagonal) equals: 0.0000E+00
which may be too small to permit a stable calculation.
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