本人最近在模拟表层膨胀浸水膨胀对桩的影响,将膨胀土的膨胀作用采用热力学中热胀冷缩来等效模拟。
由于缺乏膨胀土中的本构,ANSYS采用什么本构来近似模拟这种膨胀作用。
在数值模拟过程中,开始将热应力。结构以及接触面一起分析,即在传统桩土接触分析后,自重应力计算完,导入温度应力,接触面处计算不易收敛,不建立接触采用耦合方法,又于实际情况不符。
考虑接触面的命令流如下:(温度应力只是作为试算,不太准)
!!温度荷载文件在附件中。其中温度荷载跟结构计算节点是
匹配的。
finish
/clear
/filname,three,1
/replot
/prep7
BZHUANG=1.0
H1ZHUANG=2
H2ZHUANG=9.5
BTU=7
HTU=19
et,1,solid45
et,2,170
et,3,173
keyopt,3,1,1
keyopt,3,9,0
keyopt,3,12,2
mp,ex,1,3.2e10
mp,prxy,1,0.167
mp,dens,1,2500
mp,alpx,1,0.01
mp,ex,2,2.6e8
mp,prxy,2,0.42
mp,dens,2,1900
mp,alpx,2,0.01
tb,dp,2
tbdata,,19000,31,29
mp,mu,3,0.2
r,1$r,2$r,3
BLC4,,,BTU,BTU,-HTU
BLC4,,,BZHUANG,BZHUANG,-H2ZHUANG
VSBV,1,2
WPOFF,BZHUANG
WPROTA,,,90
VSBW,ALL
WPOFF,,BZHUANG
WPROTA,,90
VSBW,ALL
WPCSYS,-1
WPOFF,,,-H2ZHUANG
VSBW,ALL
NUMCMP,ALL
VATT,2,2,1
ESIZE,0.5
MSHKEY,1
VMESH,ALL
VSEL,NONE
BLC4,,,BZHUANG,BZHUANG,H1ZHUANG+H2ZHUANG
VATT,1,1,1
VMESH,ALL
ASEL,S,,,37,39,2
ASEL,A,,,34
NSLA,S,1
REAL,3
TYPE,2
MAT,3
ESURF,ALL
ALLSEL,ALL
ASEL,S,,,6,10,2
NSLA,S,1
REAL,3
TYPE,3
ESURF,ALL
ASEL,S,LOC,X,0
ASEL,A,LOC,Y,0
DA,ALL,SYMM
ASEL,S,LOC,X,BTU
ASEL,A,LOC,Y,BTU
DA,ALL,ALL
ASEL,S,LOC,Z,-HTU
DA,ALL,UZ
!加载,求解,施加重力场
/solu
antype,static
alls
fcum,add,,
acel,,,9.8
deltim,0.2,0.005,0.4
autots,on
pred,on
nlgeom,on
nropt,full,,on
kbc,0
time,1
outres,basic,1
cnvtol,f,,0.02,2,1
solve
save
rescontrol,file_summary
!!导入温度荷载,计算出现不收敛,不知道是不是该模块
并不能模拟,热,结构还有接触的问题。
finish
/clear
/filname,three
/solu
antype,,rest,1,5
time,2
allsel
nplot
tref,-10
ldread,temp,,,,,three-temp1,rth
solve
save
rescontrol,file_summary
!!!!!!!温度荷载附件太大,我就放温度场命令流了,求解决
finish
/clear
/filname,three-temp1,1
/replot
/prep7
BZHUANG=1.0
H1ZHUANG=2
H2ZHUANG=9.5
BTU=7
HTU=19
et,1,solid70
et,2,170
et,3,173
keyopt,3,1,2
keyopt,3,2,1
keyopt,3,12,2
mp,kxx,1,0.007
mp,kxx,2,1e-13
mp,kxx,4,1e-13
MP,MU,3,0.2
r,1$r,2$r,3
BLC4,,,BTU,BTU,-HTU
BLC4,,,BZHUANG,BZHUANG,-H2ZHUANG
VSBV,1,2
WPOFF,BZHUANG
WPROTA,,,90
VSBW,ALL
WPOFF,,BZHUANG
WPROTA,,90
VSBW,ALL
WPCSYS,-1
WPOFF,,,-H2ZHUANG
VSBW,ALL
NUMCMP,ALL
VATT,2,2,1
ESIZE,0.5
MSHKEY,1
VMESH,ALL
VSEL,NONE
BLC4,,,BZHUANG,BZHUANG,H1ZHUANG+H2ZHUANG
VATT,1,1,1
VMESH,ALL
ASEL,S,,,37,39,2
ASEL,A,,,34
NSLA,S,1
REAL,3
TYPE,2
MAT,3
ESURF,ALL
ALLSEL,ALL
ASEL,S,,,6,10,2
NSLA,S,1
REAL,3
TYPE,3
ESURF,ALL
allsel
nsel,s,loc,z,0,-2.5
esln,s
esel,u,mat,,1,3,2
EMODIF,all,MAT,4
allsel
esel,s,mat,,4
nsle,s
nsel,r,loc,z,0
d,all,temp,0
allsel
esel,s,mat,,4
nsle,s
nsel,r,loc,z,-3
d,all,temp,-10
allsel
esel,s,mat,,1
nsle
d,all,temp,-10
allsel
eplot
finish
!求解(热分析)
/solu
solve
finish
!查看温度场分布
/post1
plnsol,temp
!!!!!!!!!!!!!!!
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