加载完了出现这样的问题求解不出来。怎么解决？

s12091045

*** OptiStruct defaults set from:
   install config file: d:\Program Files\Altair\11.0/hwsolvers/hwsolver.cfg.
  

NOTE # 1929
Created RAM scratch area: total size 200 MB.
*** WARNING 1931:    FORCE    3 is not referenced by Case Control.
*** WARNING 1931:    FORCE    4 is not referenced by Case Control.

*** ERROR # 1501 ***
for material id =         1 referenced from property id =         1.
Either E or G must be explicitly provided for MAT1. Otherwise singular
material is produced.


                 ----------------------------------------

NOTE #  1599
    1 stability-related material property errors found. To bypass checking
these errors use PARAM,CHECKMAT,NO. This may, however, cause zero or negative
pivots and excessive compliance.



************************************************************************

lbsys_3122

检查材料，材料出了问题~E和G至少有一个~~

s12091045

lbsys_3122 发表于 2012-11-4 10:22
检查材料，材料出了问题~E和G至少有一个~~

谢谢，。你能说的具体点吗？什么E和G ？我没定义D和G单元呀？

lbsys_3122