ANSYS轮胎建模方法与接触分析技术详细教程

fini
/cle
/prep7
/title,wheel-3

!_____________________________________定义单元类型__________________________________________________

et,1,45 !用来给土层，轮辋以及基层来分网格
et,2,181

!____________________________________________________________________________________________________

!____________________________________定义轮胎材料参数_________________________________________________
!___________________________定义超弹材料，用9常数模型(单位为MPa)___________________
mp,ex,1,8000e6
mp,prxy,1,0.4

!____________________________定义正交弹性材料(单位为MPa)___________________________
mp,ex,2,1.03e10
mp,prxy,2,0.33

mp,ex,3,2.1e11
mp,prxy,3,0.3

save,material4,db

/prep7
!_______________________________________定义道路几何参数___________________________________________
areaload=0.557800e6 !单位mpa
arearadiu=0.1066 !单位m
top=0.5493
thick1=0.04+top !单位m
thick2=0.06
thick3=0.07
thick4=0.25
thick5=0.27
thick6=3.5
distanceofaxie=1.5*arearadiu !两轮中心距

rightb=1.50
leftb=-1.50
frontb=1.50
backb=-1.50
depthb=-(thick1+thick2+thick3+thick4+thick5+thick6)
!___________________________________________________________________________________________________

!______________________________________定义道路材料参数_____________________________________________
ex1=1200e6 !单位MPa
prxy1=0.35
dens1=2.509e-03 !单位kg/m3

ex2=1000e6
prxy2=0.35
dens2=2.447e-03

ex3=1000e6
prxy3=0.35
dens3=2.432e-03

ex4=1400e6
prxy4=0.2
dens4=2e-03

ex5=800e6
prxy5=0.2
dens5=1.800e-03

ex6=35e6
prxy6=0.4
dens6=1.900e-03
!___________________________________________________________________________________________________

!________________________________定义道路材料参数__________________________________________________
mp,ex,4, ex1 !定义道路第一层材料参数
mp,PRXY,4,prxy1
mp,dens,4,dens1

mp,ex,5, ex2
mp,PRXY,5,prxy2
mp,dens,5,dens2

mp,ex,6, ex3
mp,PRXY,6,prxy3
mp,dens,6,dens3

mp,ex,7, ex4
mp,PRXY,7,prxy4
mp,dens,7,dens4

mp,ex,8, ex5
mp,PRXY,8,prxy5
mp,dens,8,dens5

mp,ex,9, ex6
mp,PRXY,9,prxy6
mp,dens,9,dens6
!__________________________________________________________________________________________________

/prep7
!______________________________建立轮胎模型_________________________________________________________
k,1,0,0,0
k,2,0,0,0.03
k,3,0,0.01,0
k,4,0.297,0,0
k,5,0.297,0,0.2
k,6,0.297,0,-0.2
k,7,0.297,0,0.01
k,8,0.297,0,-0.01
k,9,2,0,0.01
k,10,0,0,-0.005
k,11,0,0,0.005
k,12,0.4028,0,0
k,13,0.5425,0,0
k,14,0.4028,0.01,0
circle,1,0.297,2,4,360,1
l,5,6
LGEN,2,4,,1,0.01
l,6,19
l,5,18
lsel,s,,,4,7,1
al,all

lsel,all
VDRAG,1,,,,,,1,2,3
vsel,s,,,1,3,1
vadd,all !4

torus,0.4028,0.1362,0.1422 !1
torus,0.4028,0.1422,0.1465 !2

vsbv,2,4,sepo,dele,keep !3,5
vdele,3

vsbv,1,4,sepo,dele,keep !2,3
vdele,2

wpoffs,,, 0.110836
WPSTYLE,,,,,,,,1
wpstyle,0.05,0.1,-1,1,0.003,0,0,,5
vsbw,4,speo,dele
vdele,2

wpoffs,,, -0.110836*2
vsbw,1,speo,dele !轮辋宽0.11085
vdele,4

l,11,10 !40
circle,11,0.297,2,7,360,1
lsel,s,,,41,43,2
lsel,a,,,56
al,all !11
lsel,all
vdrag,11,,,,,,40 !1
vsel,s,,,1,2
vadd,all !4

vsel,all
vglue,3,4,5 !1内胎,2外胎,6轮辋

!分网格

HPTCREATE,area,11,, coord,0,0,0.005
HPTCREATE,area,73,, coord,0,0,-0.005
vsel,s,,,6
type,1
mat,3
mshape,1,3D
mshkey,0
esize,0.04
!要粗化
vmesh,all
vsel,all !1336,1178
csys,0

!给外轮胎分网格
!HPTCREATE,area,21,, coord,0,0.5493,0
vsel,s,,,2
type,2
mat,1
mshape,1,3D !定义单元形状
mshkey,0
esize,0.02 !定义为自由网格
!可能要局部粗化
vmesh,all
vsel,all

!给轮胎束带层分网格
vsel,s,,,1
type,2
mat,2
mshape,1,3D
mshkey,0
esize,0.02
!可能要局部粗化
vmesh,all

!在内胎的内面上施加面荷载
!13,14,67-70
asel,s,,,13,14
asel,a,,,67,70,1
nsla,s
SF,all,pres,0.63e6 !压力单位为Pa
csys,0
save,finimodel,db

/prep7
!____________________________________________________定义路面_______________________________________________

block,rightb,leftb,-top,-thick1,frontb,backb !3
block,rightb,leftb,-thick1,-(thick1+thick2),frontb,backb !4
block,rightb,leftb,-(thick1+thick2),-(thick1+thick2+thick3),frontb,backb !5
block,rightb,leftb,-(thick1+thick2+thick3),-(thick1+thick2+thick3+thick4),frontb,backb!7
block,rightb,leftb,-(thick1+thick2+thick3+thick4),-(thick1+thick2+thick3+thick4+thick5),frontb,backb!8
block,rightb,leftb,-(thick1+thick2+thick3+thick4+thick5),depthb,frontb,backb!9

vglue,3,4,5,7,8,9 !3,10,11,12,13,14

vsel,s,,,3
type,1
mat,4
mshape,1,3D !定义单元形状
mshkey,0
esize,0.0.5 !定义为自由网格
vmesh,all

vsel,s,,,10
type,1
mat,5
mshape,1,3D !定义单元形状
mshkey,0
esize,0.15 !定义为自由网格
vmesh,all

vsel,s,,,11
type,1
mat,6
mshape,1,3D !定义单元形状
mshkey,0
esize,0.18 !定义为自由网
vmesh,all

vsel,s,,,12
type,1
mat,7
mshape,1,3D !定义单元形状
mshkey,0
esize,0.2 !定义为自由网格
vmesh,all

vsel,s,,,13
type,1
mat,8
mshape,1,3D !定义单元形状
mshkey,0
esize,0.3 !定义为自由网格
vmesh,all

vsel,s,,,14
type,1
mat,9
mshape,1,3D !定义单元形状
mshkey,0
esize,0.5 !定义为自由网格
vmesh,all

nsel,all
vsel,all
asel,all

fini
/solu

!__________________________________给道路加约束_______________________________________________
csys,0
nsel,all
nsel,r,loc,y,depthb
d,all,all,0

nsel,all
nsel,r,loc,x,rightb
nsel,a,loc,x,leftb
d,all,ux,0

nsel,all
nsel,r,loc,z,frontb
nsel,a,loc,z,backb
d,all,uz,0

save,pavemodel,db

fini
/prep7

!______________________________加接触对_________________________________________
r,1001
et,11,targe170
et,12,conta174
KEYOPT, 12,2,1 !定义使用罚函数
KEYOPT, 12,12,1 !定义为无限大,忽略滑动
KEYOPT, 12,7,3 !对下一个子步预测一个最小的时间增量

asel,s,,,22
asel,a,,,100,101
nsla,s
!nsel,r,loc,y,-0.4,-0.5493,0.0001
cm,_contact12,node
type,12
real,1001
esurf,,buttom

asel,s,,,9 !目标面，选择较为粗的网格
nsla,s
!nsel,r,loc,x,-0.8,0.8,0.0001
!nsel,r,loc,z,-0.7,0.7,0.0001
cm,_target12,node
type,11
real,1001
esurf,,top
save,contact,db
fini

fini
/solu
nsel,s,,,206
nsel,a,,,412
d,all,all,0
!d,all,uy,0

vsel,s,,,1,2
nsel,r,loc,x,0
d,all,ux,0

vsel,s,,,1,2
vsel,a,,,6
nsel,r,loc,z,0
d,all,uz,0

antype,static

asel,all
nsel,all

time,1
solve

但是其接触部分的UY,UX方向位移明显错误(问题1)

当我把材料一改为超弹材料
mp,ex,1,9000
mp,prxy,1,0.49
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,DENS,1,,1150
TB,mooney,1,1,9,MOON
TBTEMP,0
TBDATA,,0.770,,0.0671,,,0.0955
TBDATA,,,,,,,
MPTEMP,,,,,,,,
MPTEMP,1,0

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