紧急求救:有关警告信息的解决问题
我在进行问题求解的时候,出现了如下的警告信息:*** WARNING *** CP = 307.109 TIME= 17:17:03
Coefficient ratio exceeds 1.0e8 - Check results.
*** WARNING *** CP = 483.219 TIME= 17:20:00
There are 9058 positive pivots with ratios less than 1.E-13 indicating
a possible poorly conditioned stiffness matrix.
*** WARNING *** CP = 483.219 TIME= 17:20:00
There are 1762 negative pivots with ratios greater than -1.E-13
indicating a possible poorly conditioned stiffness matrix.
哪位大侠能否指点一二?在下不甚感激! 第一个警告可能是因为系统对某些单元有默认的尺寸限制
也许你有一个某一方向的尺寸远大于另一方向的尺寸
后面两个警告的原因不太好推断 我是在做流固耦合进行模态分析时出现如上警告信息的,后面还有如下警告信息
*** WARNING *** CP = 93.953 TIME= 21:11:25
Lanczos recursions terminated after 3 vectors.Apply a new shift
(FREQB) using MODOPT command and re-run for additional eigenvalues of
the problem.
*** WARNING *** CP = 93.953 TIME= 21:11:25
There are no solutions in the selected range.
*** ERROR *** CP = 94.000 TIME= 21:11:25
Mode file does not exist.
很苦恼,不知道怎么解决。
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