大家好,我做的是一个桩土接触分析问题,想把一个桩从土中拔出,施加两个荷载步,第一步,施加重力荷载,第二步把桩从中拔出,在运行第二步时出了问题,算不下去,请大师不吝指教 ,不胜感激。命令流如下: J0eJRs
FINI A&:i$`m,
/CLEAR ief~*:5
8 FqhSzw
/filname,pile-soil contact M#PutrH
/title,pile fZ*LxL
!/config,nres,2000000 [4_JK
/units,si !国际单位制 Vif0z*\e{
_FJ,, /~
fe=0.1 !摩擦系数 aj71oki)
fkn=10 !法向接触刚度 GkT:7`|C
fkt=3!切向接触刚度 cxNb!G
ftoln=1 !初始渗透因子 d
Xiv8B1
fact=2!静动摩擦系数 <e
s>FD
UY!N"[&
/prep7 OZ/!=;
lhk[U!>#
et,1,solid45 Y8Bc
&q}
I,:R~^qJ8v
mp,ex,1,7.2e10 !桩的弹性模量,根据管壁厚度折算 (np %urx!
mp,nuxy,1,0.3 !桩的泊松比 h5:>o
mp,dens,1,2000 !桩的密度 mF?GQls`
!mp,mu,1,fe !桩体性质 k[6xuyY]
z DP
mp,ex,2,2e8 !土的弹性模量,经验取值 >brf7h
mp,nuxy,2,0.3 !土的泊松比 i"h '^6M1
mp,dens,2,2000 !土的饱和密度 QX'EMyK$
tb,dp,2 huu v`$~y
tbdata,1,0,30 !粘聚力c为0,摩擦角为30 \GR M,c
yJheni
!创建桩模型 (L{Kg U&{$
cylind,0,0.1,-0.1,7.1,0,90 \1AtBc&
!创建土体模型 t~luBUF
cylind,0.1,0.6,0,7,0,90 RO([R=.`/
d=TZaVL$$
!桩体划分网格 Nf#8V|
allsel,all PjH[8:,
vsel,s,,,1 "w)Y0Qq*z
aslv,s (|6Y1``
lsla,s ,+u.FQv~
lesize,1,,,6 y U-^w^4
lesize,2,,,6 sg.8Sd"]7
lesize,3,,,6 8$|<`:~J
lesize,4,,,6 Y7vTseq
lesize,5,,,6 "k8Yc<`u
lesize,6,,,6 kHO2&"6
lesize,7,0.05 wIrjWU2
lesize,8,0.05 |M*jo<C
lesize,9,0.05 GwOn&EpY!
type,1 D^?jLfW8
mat,1 23lLoyN
mshape,0,3d *Cdw"n
mshkey,1 "Ih>>|r
vmesh,all NF}QQwG3
LqH<HGMFD
vsel,s,,,2 !土层,划分网格 fZ9EE3
vplot ;g3z?Uz)
aslv,s Kk}|[\fW
lsla,s AoaRlk-#
lplot u,zA^%
lesize,10,,,6 uhyw?#f
lesize,11,,,6 P87!+pB(
lesize,12,,,6 F:PaVr3q
lesize,13,,,6 pjC2jlwm*
lesize,14,,,6 Q}KNtNCpx
lesize,15,,,6 ^w0V{qF{
lesize,16,,,6 |H:JwxH
lesize,17,,,6 4%8}vCs
lesize,18,0.05 Ywj=6 +;
lesize,19,0.05 ")/TbTVu
lesize,20,0.05 E<[_L!2
lesize,21,0.05 y_^w|
type,1 0_}^IiG
mat,2 vybQ}dscn
mshape,0,3d `EV"
/&`
mshkey,1 ? m$uqi
vmesh,all G}o?lo\#h
M18H1e@Al
!创建接触对 \9U4V>p
!用接触向导建立接触对 g/)$-Z)Nu
allsel ;(a\F
et,2,170 c0J=gZiP
et,3,173 2?",2x09
r,1 2v!ucd}
real,1 }pE8G#O&
keyopt,3,9,0 !消除初始渗透 'Zq$W]i
keyopt,3,12,2 !不分开接触,允许滑动,法向不分开 s m42
'~dE0ohWb
桩侧,建立目标面 {K{&__Nk
r,1,,,fkn,ftoln, , , 8q)wT0A~
rmore,,,,,,fkt )+^1QL
RMORE,,,, ,, u9WQ0.
RMORE,,,fact,,, `w_?9^7mH
mp,mu,3,fe F1V[8I.0
5e!YYt>
!创建接触对 ; Nw.
vsel,s,,,1 dx=\Pq
asel,s,,,3 aR }|^ex
aplot 2b+0}u>a
cm,target,area #z|\AmZ\
type,2 _1z|QC
real,1 e=11EmN9
mat,3 ;WQ@dC
nsla,s,1 oB9t&yM
esurf,all fIrl?X']
esel,s,type,,2 _Qy3A T~
eplot `O-LM e
/psymb,esys,1 | v?
pS
allsel!很重要 V\ud4
l@+WGh
!定义接触面 x+V;UD=mH
vsel,s,,,2 zNE"5
vplot B,sv! p+q5
asel,s,,,9 MC.,n$O}6
aplot \V@Hf"=j
cm,contact,area s*R\!L
type,3 zE{@'
real,1 .xtjB8gc
mat,3 |aiP7C
nsla,s,1 -.A8kJ
esurf,all S-
Mh0o"
esel,s,type,,3 =e7,d$i
eplot q% Eze
/psymb,esys,1 (fgX!G[W
allsel &"dT/5}6
save tuA,t
gf]biE"k
!侧面施加对称约束 ;!<WL@C~
allsel xCH,d:n=
CSYS,0 m1 78S3
asel,s,loc,x,0 B;'Dh<J1
da,all,symm Jtj_Rl
!
asel,s,loc,y,0 fH.:#O:
da,all,symm (7RxCo=X
-GkNA"2M[
allsel,all :$&%Pxm
!asel,s,,,2!桩顶面2未约束 V/Hjd`n)`i
!da,all,all DPvM|n`TW
asel,s,,,6 73/kyu-0%
da,all,ALL %H:uE*WZ
!约束外侧面 $'3`$
asel,S,,,8 `nccRy<l
NSLA,S,1 2Mc/ah
CSYS,1 [>"bL$tlo*
NROTAT,ALL 4[za|t
D,ALL,UX I__|+%oC
ALLSEL .BGM1ph}~
SAVE v*%#Fp,g8
finish!接触对定义结束 QRnkj]b
!求解过程 jsSxjf;O
/solu YV*s1t/
RQI? \?o
!约束结束!
NLFSw
!定义荷载步 -ea>}S
!第一步荷载,重力荷载。 k LVf}J~?
acel,0,0,9.8 jw$3cwddH
nlgeom,on ! 打开大变形选项 E6n3[Z
autot,on ! 打开自动时间步 O=}4?Xv
time,1 |p J)w
nsub,10 )/H=m7}1h
outres,all,all ud K)F$7
allsel ]gYnw;W$
SOLVE >N>WOLbb7(
!第二部荷载,拉动桩 0es[!
nsubst,100,500,5 M:|Z3p K
outres,all,all 2"lD Kjj
time,101 TEl:;4
nlgeom,on ! 打开大变形选项 Z%~j)
autot,on ! 打开自动时间步 t>|Y-i3cb
nsel,s,loc,z,7.1 vCT5do"C&
D,ALL,UZ,0.1 <}-[9fW
|ofegO}W7
lnsrch,on !自动线性搜索 `k65&]&d
pred,on !打开预测求解器 W
HO;;j
T9]|*~ ,T
allsel ([zt}uf
SOLVE