【求助】为什么不收敛

bijiaoshuai

在矩形板上烧结，为什么不收敛？？急？？
BLOCK,-0.005,0.005,-0.0024,0.0024,0,0.001
BLOCK,-0.004,0.004,-0.00135,0.00135,0.001,0.0013
错误信息如下：

*** WARNING ***                         CP =     325.531   TIME= 21:43:32
Both solid model and finite element model boundary conditions have been
applied to this model.  As solid loads are transferred to the nodes or  
elements, they can overwrite directly applied loads.                    
*** WARNING ***                         CP =     353.281   TIME= 21:44:01
INITIAL CONDITIONS SPECIFIED - TUNIF IGNORED.                           
*** WARNING ***                         CP =     354.344   TIME= 21:44:02
Previous testing revealed that 3 of the 14886 selected elements violate
shape warning limits.  To review warning messages, please see the      
output or error file, or issue the CHECK command.                       
*** WARNING ***                         CP =     356.172   TIME= 21:44:04
Material property C of material 1 of element 4724 is evaluated at a     
temperature of 1537.24344, which is above the supplied temperature      
range.  Temperature range checking terminates.

lzz_185

估计是材料的问题
把各材料参数给出来看看~

bijiaoshuai

ET,1,SOLID70   
MP,DENS,1,6202
MPTEMP,1,25,100,500,1000,1500
MPDATA,C,1,1,323.6,353.2,388.4,437.2,487.2
MPTEMP,1,25,500,1000,1500,3000
MPDATA,KXX,1,1,2,5,50,70,80
MPDATA,ENTH,1,1,0,9.9E5,1.8E6,3.25E7,4.3E7
MPTEMP,1,25,100,500,1000,1500
MP,DENS,2,7824
MPDATA,KXX,2,1,47.68,34.16,24.02,225,235
MPDATA,C,2,1,472,480,615,700,500

lzz_185

1.温度范围  你的温度范围有25~1500的又有25~3000的，计算过程中是不出现了处于1500~3000的计算结果呢？
2.焓的取值  一般不收敛都是焓的影响 你把enth去掉，看看是不能收敛，能的话说明其他的没啥问题，然后再修改焓的取值，可以多取几个点，令焓值-温度曲线尽量平滑，应该就可以了
如果都修改了还不行，那在看网格，以及时间步长的选取~

bijiaoshuai

谢谢指点

lzz_185

还不收敛么，都怎么改了？