分析求解出错 [复制链接]

出现  WARNING : SINGULARITY WAS FOUND IN REDUCED MASS MATRIX
然后计算一直持续，无法得到结果……  请教高手这是什么原因呢？

> ENTRY EIGEN FOR TIME HISTORY ANALYSIS
>   EIGEN SOLUTION : SUBSPACE ITERATION METHOD.
> * SUBSPACE ITERATION NUMBER =   1
>   MULTI-FRONTAL SOLUTION HAS BEEN COMPLETED.    
> WARNING : NODE NO.   9464  RY  DOF HAS A SINGULAR DIAGONAL =    0.000    
> WARNING : EQUATION NO.     28474
> WARNING : NODE NO.   9440  RY  DOF HAS A SINGULAR DIAGONAL =    0.000    
> WARNING : EQUATION NO.     28334
> WARNING : NODE NO.   9440  RX  DOF HAS A SINGULAR DIAGONAL =    0.000    
> WARNING : EQUATION NO.     28333
> WARNING : NODE NO.   9440  DZ  DOF HAS A SINGULAR DIAGONAL =    0.000    
> WARNING : EQUATION NO.     28332
> WARNING : NODE NO.   9440  DZ  DOF MAY BE SINGULAR.
> WARNING : EQUATION NO.     28332
> WARNING : NODE NO.   9440  DX  DOF MAY BE SINGULAR.
> * SUBSPACE ITERATION NUMBER =   2
> WARNING : SINGULARITY WAS FOUND IN REDUCED MASS MATRIX
> WARNING : SINGULARITY WAS FOUND IN REDUCED MASS MATRIX
> WARNING : SINGULARITY WAS FOUND IN REDUCED MASS MATRIX
>

子空间迭代第2次显示了很多警告SUBSPACE ITERATION NUMBER =   2
> WARNING : SINGULARITY WAS FOUND IN REDUCED MASS MATRIX
> WARNING : SINGULARITY WAS FOUND IN REDUCED MASS MATRIX
> WARNING : SINGULARITY WAS FOUND IN REDUCED MASS MATRIX
然后无法计算出结果 ……请问是质量矩阵出现奇异了吗？这问题能不能解决？麻烦了

有多余的节点自由度

谢谢leia，我把那些地方直接连接起来了……

看一下是不是存在自由面，网格是否对齐。我碰到类似的问题。

leia:有多余的节点自由度 (2009-06-29 09:03) 

您好，如果有多余的节点自由度，怎么才能消除多余的节点自由度啊？谢谢你

原来是有多余的自由度！~