本文介绍了ANSYS 温度场分析相关内容。
1、模型的建立
图1 三维模型如图所示
2、模型的简化
图2 简化成二维模型
3、材料物性参数的确定
导热系数 203.5 W/m·k
比热 880 J/(kg·℃)
密度 2700 kg/m3
4、网格划分
在下图所示的温度场有限元模型中,共使用了单元1028个,结点1179个,选用了四结点四边形PLANE55单元。
图3 网格模型
5、边界条件的确定
6、二维计算结果
[1]情况一
1)施加热面温度为45 ;
2)除施加热面外,其他部分的对流换热系数为10 3)参考温度为10
7、三维计算结果
附录A:二维分析程序
/prep7
BLC4,0,0,1.35,0.6,0
cyl4,0.35,0.3,0.2,360,0.2,360
cyl4,0.95,0.3,0.2,360,0.2,360
aovlap,all
adele,2,3,1,1
wpoffs,0.1,,
wprota,,,90
asbw,all
wpcsys,-1,0
wpoffs,0.6,,
wprota,,,90
asbw,all
wpcsys,-1,0
!1 铝
MPTEMP,,,,,,,,
MPTEMP,1,0,200,400,600,800 !conductity
MPDATA,KXX,1,1,203.5,203.5,203.5,203.5,203.5
MPTEMP,,,,,,,,
MPTEMP,1,0,200,400,600,800,1000 !比热
MPDATA,c,1,1,880,880,880,880,880,880
MPTEMP,,,,,,,,
MPTEMP,1, !密度
MPDATA,dens,1,1,2700
asel,all
aatt,1
et,1,plane55
mshkey,1
esize,0.03
wpoffs,0.35,,
wprota,,,90
asbw,all
wpcsys,-1,0
wpoffs,0.95,,
wprota,,,90
asbw,all
wpcsys,-1,0
wpoffs,,0.3,
wprota,,90,
asbw,all
wpcsys,-1,0
amap,9,7,22,17,6
amap,8,5,23,17,6
amap,10,7,22,18,8
amap,11,5,23,18,8
amap,12,9,24,20,10
amap,13,11,23,20,10
amap,14,11,23,19,12
amap,15,9,24,19,12
amesh,7
amesh,3
!!!!!!加载荷!
lsel,s,,,21
lsel,a,,,23
DL,all, ,TEMP,45 !热面施加载荷为45度。
allsel
lsel,s,,,13
lsel,a,,,1
lsel,a,,,30
lsel,a,,,14
lsel,a,,,24
lsel,a,,,22
lsel,a,,,28
lsel,a,,,20
lsel,a,,,36
lsel,a,,,39
lsel,a,,,19
lsel,a,,,27
SFL,all,CONV,20,,15 !外表面20为对流换热系数,15为环境温度。
allsel
lsel,s,,,6 !考虑内孔的换热系数。
lsel,a,,,7
lsel,a,,,8
lsel,a,,,5
lsel,a,,,9
lsel,a,,,10
lsel,a,,,11
lsel,a,,,12
SFL,all,CONV,30,,30 !内孔表面30为对流换热系数,30为环境温度。
allsel
/solu
Solve
注:word中的感叹号“!”在ansys中不能识别,运行程序的时候必须改为txt文件中的感叹号“ ”。附录B同样。
附录B:三维分析程序
/prep7
BLC4,0,0,1.35,0.6,0
cyl4,0.35,0.3,0.2,360,0.2,360
cyl4,0.95,0.3,0.2,360,0.2,360
aovlap,all
adele,2,3,1,1
wpoffs,0.1,,
wprota,,,90
asbw,all
wpcsys,-1,0
wpoffs,0.6,,
wprota,,,90
asbw,all
wpcsys,-1,0
!1 铝
MPTEMP,,,,,,,,
MPTEMP,1,0,200,400,600,800 !conductity
MPDATA,KXX,1,1,203.5,203.5,203.5,203.5,203.5
MPTEMP,,,,,,,,
MPTEMP,1,0,200,400,600,800,1000 !比热
MPDATA,c,1,1,880,880,880,880,880,880
MPTEMP,,,,,,,,
MPTEMP,1, !密度
MPDATA,dens,1,1,2700
asel,all
aatt,1
et,1,plane42
mshkey,1
esize,0.03
wpoffs,0.35,,
wprota,,,90
asbw,all
wpcsys,-1,0
wpoffs,0.95,,
wprota,,,90
asbw,all
wpcsys,-1,0
wpoffs,,0.3,
wprota,,90,
asbw,all
wpcsys,-1,0
amap,9,7,22,17,6
amap,8,5,23,17,6
amap,10,7,22,18,8
amap,11,5,23,18,8
amap,12,9,24,20,10
amap,13,11,23,20,10
amap,14,11,23,19,12
amap,15,9,24,19,12
amesh,7
amesh,3
vext,1,15,1,,,0.5
vsel,all
vatt,1
et,2,solid70
mshkey,1
esize,0.03
type,2
vsweep,all
aclear,all
!!!!!!加载荷!
asel,s,,,31
asel,a,,,35
DA,all,TEMP,45,
allsel
asel,s,,,2
asel,a,,,49
asel,a,,,53
asel,a,,,1
asel,a,,,16
asel,a,,,30
asel,a,,,26
asel,a,,,20
asel,a,,,34
asel,a,,,44
asel,a,,,48
asel,a,,,52
asel,a,,,38
asel,a,,,18
asel,a,,,28
asel,a,,,22
asel,a,,,46
asel,a,,,40
asel,a,,,3
asel,a,,,7
asel,a,,,9
asel,a,,,10
asel,a,,,11
asel,a,,,8
asel,a,,,14
asel,a,,,13
asel,a,,,12
asel,a,,,15
asel,a,,,39
asel,a,,,54
asel,a,,,6
asel,a,,,19
SFA,all,,CONV,15,20,
allsel
asel,s,,,27
asel,a,,,37
asel,a,,,24
asel,a,,,33
asel,a,,,51
asel,a,,,42
asel,a,,,45
asel,a,,,55
SFA,all,,CONV,30,30,
allsel
/solu
solve
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