求助:热应力分析
看了一下ANSYS自带的例题vm32,想模拟作一个三维的分析,但不知道怎么加耦合条件,还请高手指点一二,命令流如下:finish
/clear
/title,internal pressure analysis
/filname,b2
/PREP7
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!parameter!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
*AFUN, deg
press=8e4 ! internal pressure
dor=0.50 ! external diameter of pipe
t=0.1 ! thickness of pipe
dir=dor-2*t
pl=1
et,1,solid90
r,1
!!!!!!!!PMMA!!!!!!!!!!
mp,kxx,1,0.18
csys
wpcsys
wpoff,0,0,-pl/2
cyl4,0,0,dir/2,0,dor/2,90,pl
vsel,all
vatt,1,1,1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!meshing!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
LSEL,s,radius,,dor/2
LESIZE,all, , ,10, , , , ,1
cm,l1,line
LSEL,s,radius,,dir/2
LESIZE,all, , ,10, , , , ,1
cm,l2,line
LSEL,s,length,,t
LESIZE,all, , ,5, , , , ,1
cm,l3,line
lsel,all
cmsel,u,l1
cmsel,u,l2
cmsel,u,l3
lplot
!cmsel,u,l4
LESIZE,all, , ,20, , , , ,1
!SMRTSIZE,6
allsel,all
!vsel,s,loc,z,-pl/2,-pitch/2
vsel,all
vplot
MSHAPE,0,3D
MSHKEY,1
VMESH,all
finish
/SOLU
csys,1
asel,s,loc,x,dir/2-0.00001,dir/2
aplot
nsla,s,1
d,all,temp,100
csys,1
asel,s,loc,x,dor/2-0.00001,dor/2
aplot
nsla,s,1
d,all,temp,20
allsel,all
solve
finish
/post1
plnsol,temp
save
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!structural anlysis!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
/prep7
etchg,tts
r,1
!!!!!!!!PMMA!!!!!!!!!!
mp,ex,1,3.2e9
mp,prxy,1,0.35
mp,alpx,7e-5
csys,0
nsel,s,loc,x,0
d,all,ux,0
d,all,uy,0
d,all,uz,0
nsel,s,loc,y,0
d,all,ux,0
d,all,uy,0
d,all,uz,0
/SOLU
tref,20
LDREAD,temp,,,,,b2,rth,
以下该如何耦合:!(:!(:!(
allsel,all
solve
finish
Re:求助:热应力分析
一般来说,热结构耦合问题,显计算热问题,然后计算结构问题,但从你的命令流来看,是先计算的结构问题,而结构问题是没有温度自由度的,你读出来的结果肯定都是零.如果你只是想练习一下的话,只需要先计算温度场,然后将温度结果读出作为结构计算的边界条件,另外需要注意的是单元属性需要改变,这是需要特别注意的.Re:求助:热应力分析
非常感谢二楼的回答,但我并不认为是这样,我的命令流正如你所言是先进行温度场计算再进行结构分析的。我前面用的是solid90单元,而且用命令plnsol,temp时能看到温度场的分布,随后我用了etchg,tts和LDREAD,temp,,,,,b2,rth,读入温度结果作为体力施加,为什么结构分析的结果全为0呢?温度分析没问题,读入温度结果也没问题,为什么结构分析结果全为0
Re:求助:热应力分析
怎么没人回答
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