请高手帮忙看看感应加热问题

zhl1984sd

我做的感应加热，初始温度不均匀，通过ldread读入的，加热过程中在760度应该有一个拐点，即760度以后温升速度应该降低，可是我的是在760度后温升速度变高了，不合理，哪位高手知道为什么，还望不吝赐教，先谢谢了！

zhl1984sd

760度的时候，钢管磁感应系数降为一，感应加热效率下降，工厂里事实是这样
钢管材料磁感应系数材料属性
MPTEMP
MPTEMP,     1, 0.2000000E+02, 0.1000000E+03, 0.2000000E+03, 0.3000000E+03, 0.4000000E+03
MPTEMP,     6, 0.5000000E+03, 0.6000000E+03, 0.7000000E+03, 0.7200000E+03, 0.7420000E+03
MPTEMP,    11, 0.7600000E+03, 0.8000000E+03, 0.9000000E+03, 0.1000000E+04, 0.1100000E+04
MPTEMP,    16, 0.1400000E+04,
MPDATA,MURX,       1,   1, 0.2000000E+03, 0.1950000E+03, 0.1866000E+03, 0.1781000E+03, 0.1670000E+03
MPDATA,MURX,       1,   6, 0.1550000E+03, 0.1380000E+03, 0.9250000E+02, 0.3300000E+02, 0.1100000E+02
MPDATA,MURX,       1,  11, 0.1000000E+01, 0.1000000E+01, 0.1000000E+01, 0.1000000E+01, 0.1000000E+01
MPDATA,MURX,       1,  16, 0.1000000E+01

模型是钢管焊缝上的一矩形线圈，感应加热热处理，建摸代码如下
PREP7
cylind,0.1095,0.10065,-0.15,0.15,80,100
cylind,0.1095,0.10065,-0.15,0.15,0,360
vovlap,all
numcmp,volume  !压缩体积编号

block,0.003,0.015,0.114,0.116,-0.12,0.12
block,-0.003,-0.015,0.114,0.116,-0.12,0.12
block,0.035,0.047,0.114,0.116,-0.12,0.12
block,-0.035,-0.047,0.114,0.116,-0.12,0.12

block,0.018,0.03,0.114,0.134,-0.11,0.11
block,-0.018,-0.03,0.114,0.134,-0.11,0.11  
block,-0.03,0.03,0.134,0.144,-0.11,0.11   !画磁棒
vadd,7,8,9
numcmp,volume  

wpoffs,0.025,0,0.12   !移动工作平面
wprota,0,90,0      !旋转工作平面
cylind,0.022,0.01,-0.114,-0.116,0,180

wpoffs,0,-0.24,0   !移动工作平面
cylind,0.022,0.01,-0.114,-0.116,180,360

wpoffs,-0.05,0,0   !移动工作平面
cylind,0.022,0.01,-0.114,-0.116,180,360

wpoffs,0,0.24,0   !移动工作平面
cylind,0.022,0.01,-0.114,-0.116,0,180

vglue,3,5,8,9
vglue,4,6,10,11

numcmp,volume  !压缩体积编号

wpoffs,0.025,-0.12,-0.1   !移动工作平面
wprota,0,-90,0      !旋转工作平面

cylind,0.5,0,-0.6,0.6,0,360   !画空气

vovlap,all  !overlap所有体
numcmp,volume  !压缩体积编号
!以上是创建实体模型

加载的电流密度，按方向不同，分段加的
VSEL,S, , ,      3  !   
ESLV,S  
FLST,2,2492,2,ORDE,2
FITEM,2,17785   
FITEM,2,-20276  
BFE,P51X,JS,1,,,-10e7, ,
VSEL,S, , ,      4  !   
ESLV,S  
FLST,2,2492,2,ORDE,2
FITEM,2,20277   
FITEM,2,-22768  
BFE,P51X,JS,1,,,-100000000, ,
VSEL,S, , ,      5  !   
ESLV,S  
FLST,2,2496,2,ORDE,2
FITEM,2,22769   
FITEM,2,-25264  
BFE,P51X,JS,1,,,100000000, ,
VSEL,S, , ,      6  !   
ESLV,S  
FLST,2,2490,2,ORDE,2
FITEM,2,25265   
FITEM,2,-27754  
BFE,P51X,JS,1,,,100000000, ,
VSEL,S, , ,      8  !   
ESLV,S  
FLST,2,814,2,ORDE,2
FITEM,2,27755   
FITEM,2,-28568  
BFE,P51X,JS,1,,-10e7,, ,
VSEL,S, , ,      9  !   
ESLV,S  
FLST,2,919,2,ORDE,2
FITEM,2,28569   
FITEM,2,-29487  
BFE,P51X,JS,1,,-100000000,, ,
VSEL,S, , ,      10  !  
ESLV,S  
FLST,2,924,2,ORDE,2
FITEM,2,29488   
FITEM,2,-30411  
BFE,P51X,JS,1,,100000000,, ,
VSEL,S, , ,      11  !  
ESLV,S  
FLST,2,916,2,ORDE,2
FITEM,2,30412   
FITEM,2,-31327  
BFE,P51X,JS,1,,100000000,, ,
边界条件是
FLST,2,4,5,ORDE,2   
FITEM,2,63  
FITEM,2,-66
DA,P51X,AZ,0,0
应该没错，我是从原来的模型上  该的，原来是圆环型的线圈，在760度拐点向下，没问题啊
请大家多多指点

chinawang123

能把整个命令流 或者LOG文件分享么 我对初始温度不均匀很有兴趣
好像不是整个命令流
首先你有辐射边界条件么