zhl1984sd 发表于 2009-6-2 09:20:43

请高手帮忙看看感应加热问题

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 发表于 2009-6-3 09:03:02

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 发表于 2011-3-25 22:38:54

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
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