高手过来看看渗流输出结果

lvhaidong

这是我做的渗流结果但是好象有问题，请高手帮助！！！
*** CONDUCTIVITY MATRIX NOT POSITIVE DEFINITE ***
NODE NUMBER =         2 NONPOSITIVE PIVOT FOR EQUATION          2
PIVOT =   0.000000000000E+00

*** CONDUCTIVITY MATRIX NOT POSITIVE DEFINITE ***
NODE NUMBER =         5 NONPOSITIVE PIVOT FOR EQUATION          5
PIVOT =   0.000000000000E+00

*** CONDUCTIVITY MATRIX NOT POSITIVE DEFINITE ***
NODE NUMBER =         8 NONPOSITIVE PIVOT FOR EQUATION          8
PIVOT =   0.000000000000E+00

*** CONDUCTIVITY MATRIX NOT POSITIVE DEFINITE ***
NODE NUMBER =        11 NONPOSITIVE PIVOT FOR EQUATION         11
PIVOT =   0.000000000000E+00

*** CONDUCTIVITY MATRIX NOT POSITIVE DEFINITE ***
NODE NUMBER =        14 NONPOSITIVE PIVOT FOR EQUATION         14
PIVOT =   0.000000000000E+00

*** CONDUCTIVITY MATRIX NOT POSITIVE DEFINITE ***
NODE NUMBER =        17 NONPOSITIVE PIVOT FOR EQUATION         17
PIVOT =   0.000000000000E+00

1360

这是说渗流矩阵不正定，很可能是网格剖分质量不好或渗流系数不合适造成的。

lvhaidong

谢谢我试过了是渗透系数取的不合适造成的我改大了以后就好了