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殷娜的宽恕

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虫号: 6350526
注册: 2017-04-19

[求助] ansys瞬态热分析热膨胀变化速度异常

ansys瞬态热分析进行一个铝板传热的仿真。
一开始热膨胀变化很快，到后面热膨胀变化变得很慢，一直达不到热平衡状态。仿真时间达到90000s以上，热变形还在继续。导致无法得到预期结果。
下面是命令流
/prep7
lengh1=0.050
lengh2=0.050
lengh3=0.050
lengh4=0.050
lengh5=0.050
lengh6=0.050
lengh7=0.050
lengh8=0.050
lengh9=0.050
lengh10=0.050
llengh=0.5
!带宽分段水冷

glengh1=0.040
glengh2=0.260
glengh=0.8
!辊身其余部分
blengh1=0.256
blengh2=0.144!轴承作用范围
blengh=0.4
r0=0.09750
r1=0.090
r2=0.040
r3=0.325

ed1=0.005       !网格分段1
ed2=0.005       !网格分段2
ed3=0.005       !网格分段3
ed4=0.005       !网格划分4
ed5=0.005       !网格划分5
ed6=0.005       !网格划分6
ed7=0.005
edr1=0.005
edr2=0.002

heatdens=5.1168e4*1.04    !热流密度热源
heatcon_bear=1.0111e4*0.03!轴承热流密度热源
con_water=1725       !水冷散热系数
con_water1=1725       !强水冷散热系数
con_water2=250       !弱水冷散热系数
con_air=40          !空冷散热系数
con_bear=250
tem_water=38          !冷却液环境温度
tem_air=26             !空冷环境温度
tem_workroll=26       !工件温度

et,1,13,4,,1,
et,2,151,,,1,
KEYOPT,2,8,2
et,3,151,,,1,
KEYOPT,3,8,1
MP,EX,1,2.36e11
MP,PRXY,1,0.3
MP,kxx,1,44
MP,dens,1,7810
MP,c,1,460
UIMP,1,REFT,,,20
MP,ALPX,1,1.15e-5

!参数化建模
RECTNG,,r0,,lengh1,
RECTNG,,r0,lengh1,lengh1+lengh2,
RECTNG,,r0,lengh1+lengh2,lengh1+lengh2+lengh3,
RECTNG,,r0,lengh1+lengh2+lengh3,lengh1+lengh2+lengh3+lengh4,
RECTNG,,r0,lengh1+lengh2+lengh3+lengh4,lengh1+lengh2+lengh3+lengh4+lengh5,
RECTNG,,r0,lengh1+lengh2+lengh3+lengh4+lengh5,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6,
RECTNG,,r0,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6, lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7
RECTNG,,r0,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7, lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8
RECTNG,,r0,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8, lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9
RECTNG,,r0,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9, lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9+lengh10

RECTNG,,r0,llengh,llengh+glengh1,
RECTNG,,r0,llengh+glengh1,llengh+glengh1+glengh2,

RECTNG,,r0,glengh,glengh+blengh1,
RECTNG,,r0,glengh+blengh1,glengh+blengh1+blengh2,

RECTNG,r0,r1+r2,,lengh1,
RECTNG,r0,r1+r2,lengh1,lengh1+lengh2,
RECTNG,r0,r1+r2,lengh1+lengh2,lengh1+lengh2+lengh3,
RECTNG,r0,r1+r2,lengh1+lengh2+lengh3,lengh1+lengh2+lengh3+lengh4,
RECTNG,r0,r1+r2,lengh1+lengh2+lengh3+lengh4,lengh1+lengh2+lengh3+lengh4+lengh5,
RECTNG,r0,r1+r2,lengh1+lengh2+lengh3+lengh4+lengh5,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6,
RECTNG,r0,r1+r2,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6, lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7
RECTNG,r0,r1+r2,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7, lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8
RECTNG,r0,r1+r2,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8, lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9
RECTNG,r0,r1+r2,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9, lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9+lengh10

RECTNG,r0,r1+r2,llengh,llengh+glengh1,
RECTNG,r0,r1+r2,llengh+glengh1,llengh+glengh1+glengh2,
AGLUE,all

!对应的网格分段设置
lsel,s,loc,y,lengh1*0.5
LESIZE,all,ed1
lsel,s,loc,y,lengh1+lengh2*0.5
LESIZE,all,ed2
lsel,s,loc,y,lengh1+lengh2+lengh3*0.5
LESIZE,all,ed3
lsel,s,loc,y,lengh1+lengh2+lengh3+lengh4*0.5
LESIZE,all,ed4
lsel,s,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5*0.5
LESIZE,all,ed5
lsel,s,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6*0.5
LESIZE,all,ed6
lsel,s,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7*0.5
LESIZE,all,ed7
lsel,s,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8*0.5
LESIZE,all,ed7
lsel,s,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9*0.5
LESIZE,all,ed7
lsel,s,loc,y,llengh-lengh10*0.5
LESIZE,all,ed7
lsel,s,loc,y,llengh+glengh1*0.5
LESIZE,all,ed7
lsel,s,loc,y,llengh+glengh1+glengh2*0.5
LESIZE,all,ed7
lsel,s,loc,y,glengh+blengh1*0.5
LESIZE,all,ed7
lsel,s,loc,y,glengh+blengh1+blengh2*0.5
LESIZE,all,ed7

lsel,s,loc,x,r0*0.5
LESIZE,all,edr1
lsel,s,loc,x,r0+r3*0.5
LESIZE,all,edr2

MSHAPE,0,2D
MSHKEY,0
AMESH,all

!以下为施加热部分
!定义载荷的数组
*DIM,heatload,ARRAY,5,1,1, , ,
*SET,HEATLOAD(1,1,1) , heatdens    ! 热流密度
*SET,HEATLOAD(2,1,1) , con_water    !水冷
*SET,HEATLOAD(3,1,1) , con_water1    !强水冷
*SET,HEATLOAD(4,1,1) , con_water2    !弱水冷
*SET,HEATLOAD(5,1,1) , con_air       !空冷

nsel,s,loc,x,r1+r2
TYPE, 2
MAT,  1
ESURF,0

TYPE, 3
MAT,  1
ESURF,0
nsel,s,loc,x,r0
nsel,r,loc,y,glengh,glengh+blengh
TYPE, 3
MAT,  1
ESURF,0
!surf单元预处理

nsel,s,loc,x,r1+r2
nsel,r,loc,y,0,llengh
ESEL,S,TYPE,,3
ESLN,R,1
SFE,all,,HFLUX, ,HEATLOAD(1,1,1), , ,    ! 热流密度
allsel
!轧辊与板带施加热部分
nsel,s,loc,x,r0
nsel,r,loc,y,glengh+blengh1,glengh+blengh
ESEL,S,TYPE,,3
ESLN,R,1
SFE,all,,HFLUX, ,heatcon_bear, , ,    ! 热流密度1
allsel
!轧辊与轴承施加热部分

nsel,s,loc,x,r1+r2
nsel,r,loc,y,0,lengh1
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(3,1,1)    !1段水冷    改变位置 1
SFE,all,1,CONV,2,tem_water
allsel
nsel,s,loc,x,r1+r2
nsel,r,loc,y,lengh1,lengh1+lengh2
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(2,1,1)    !2 段水冷
SFE,all,1,CONV,2,tem_water
allsel

nsel,s,loc,x,r1+r2
nsel,r,loc,y,lengh1+lengh2,lengh1+lengh2+lengh3
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(2,1,1)       ! 3段水冷
SFE,all,1,CONV,2,tem_water
allsel

nsel,s,loc,x,r1+r2
nsel,r,loc,y,lengh1+lengh2+lengh3,lengh1+lengh2+lengh3+lengh4
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(2,1,1)          ! 4段水冷
SFE,all,1,CONV,2,tem_water
allsel

nsel,s,loc,x,r1+r2
nsel,r,loc,y,lengh1+lengh2+lengh3+lengh4,lengh1+lengh2+lengh3+lengh4+lengh5
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(2,1,1)       ! 5段水冷
SFE,all,1,CONV,2,tem_water
allsel

nsel,s,loc,x,r1+r2
nsel,r,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(2,1,1)       ! 6段水冷
SFE,all,1,CONV,2,tem_water
allsel

nsel,s,loc,x,r1+r2
nsel,r,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(2,1,1)          !7段水冷
SFE,all,1,CONV,2,tem_water
allsel
nsel,s,loc,x,r1+r2
nsel,r,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(2,1,1)       !8段水冷
SFE,all,1,CONV,2,tem_water
allsel
nsel,s,loc,x,r1+r2
nsel,r,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(2,1,1)          ! 9段水冷
SFE,all,1,CONV,2,tem_water
allsel

nsel,s,loc,x,r1+r2
nsel,r,loc,y,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9,lengh1+lengh2+lengh3+lengh4+lengh5+lengh6+lengh7+lengh8+lengh9+lengh10
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(2,1,1)          ! 10段水冷
SFE,all,1,CONV,2,tem_water
allsel

nsel,s,loc,x,r1+r2
nsel,r,loc,y,llengh,llengh+glengh1
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(5,1,1)          ! 5 段空冷
SFE,all,1,CONV,2,tem_air
allsel

nsel,s,loc,x,r1+r2
nsel,r,loc,y,llengh+glengh1,glengh
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(5,1,1)          ! 6段空冷
SFE,all,1,CONV,2,tem_air
allsel
nsel,s,loc,y,glengh
nsel,r,loc,x,r0,r1+r2
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(5,1,1)          ! 辊肩空冷
SFE,all,1,CONV,2,tem_air
allsel

nsel,s,loc,x,r0
nsel,r,loc,y,glengh,glengh+blengh1
ESEL,S,TYPE,,2
ESLN,R,1
SFE,all,1,CONV, ,HEATLOAD(5,1,1)          ! 辊颈空冷
SFE,all,1,CONV,2,tem_air
allsel

!约束
nsel,s,loc,y,glengh+blengh
D,all,UY,0
allsel

nsel,s,loc,y,0
D,all,UY,0
allsel

nsel,s,loc,x,r0,r1+r2
nsel,r,loc,y,glengh
D,all,UY,0
allsel

FINISH
/SOL

ANTYPE,TRANS
KBC,1
OUTRES,,ALL
AUTOTS,ON
DELTIM,50,50,100
TIME,36000

TUNIF,26


solve

FINISH

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