如上图:两端伸出的小凸台希望建成体元,中间的长杆希望建成梁元,但总是报错,信息如下:
NASTRAN Msg: *** USER WARNING MESSAGE 4698 (DCMPD)
STATISTICS FOR DECOMPOSITION OF MATRIX KLL .
NASTRAN Msg: ^^^ USER FATAL MESSAGE 9137 (SEKRRS)
^^^ RUN TERMINATED DUE TO EXCESSIVE PIVOT RATIOS IN MATRIX KLL.
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这是怎么回事,怎么解决这个问题啊?