[求助] ansys 鋼管混凝土模擬為什么算幾步就算不下去了？附命令流已有1人參與

/PREP7
ET,1,SOLID65,,,,,,,1
ET,2,SOLID45

K,1
K,2,0.021,0,0
K,3,0.024,0,0
K,4,0.087,0,0
K,5,0.09,0,0
K,6,0,0.54,0
L,1,2
L,2,3
L,3,4
L,4,5
L,1,6
AROTAT,2,3,4,,,,1,6
ALLSEL,ALL
VDRAG,ALL,,,,,,5

MP,EX,1,2.0e11    !外層鋼管的材料屬性
mp,dens,1,7850
mp,prxy,1,0.3
tb,bkin,1
tbdata,1,257.9e6,0

MP,EX,2,2.0e11    !內(nèi)層鋼管的材料屬性
mp,dens,2,7850
mp,prxy,2,0.3
tb,bkin,2
tbdata,1,396.1e6,0

mp,ex,3,2.0e10
mp,prxy,3,0.173
mp,dens,3,1800
tb,mkin,3
tbtemp,,strain
tbdata,,0.0005,0.001,0.002,0.004,0.005,
tbtemp,0.0
tbdata,,10.0e6,19.2e6,32.5e6,41.6e6,41.6e6

tb,concr,3,3
tbdata,,0.4,0.9,,-1

*do,i,1,4,1
vglue,1+3*(i-1),2+3*(i-1)
vglue,2+3*(i-1),3+3*(i-1)
*enddo

vsel,s,volue,,1,10,3
vatt,2,,2
vsel,all
vsel,s,volue,,3,12,3
vatt,1,,2

vsel,all
VSEL,s ,volue , ,2,11,3
vatt,3,,1
vsel,all

ESIZE,0.012,0
MSHAPE,0,3D
MSHKEY,1
VSEL,s ,volue , ,2,11,3
VMESH,all

vsel,all
ESIZE,0,1
MSHAPE,0,3D
MSHKEY,1
VSEL,s ,volue , ,1,10,3
vsel,a,volue,,3,12,3
VMESH,all
vsel,all

FLST,4,432,1,ORDE,60
FITEM,4,14
FITEM,4,59
FITEM,4,-70
FITEM,4,605
FITEM,4,650
FITEM,4,-654
FITEM,4,887
FITEM,4,932
FITEM,4,-942
FITEM,4,1432
FITEM,4,-1436
FITEM,4,1712
FITEM,4,-1766
FITEM,4,4199
FITEM,4,-4210
FITEM,4,4745
FITEM,4,4790
FITEM,4,-4794
FITEM,4,5026
FITEM,4,-5036
FITEM,4,5576
FITEM,4,-5630
FITEM,4,8063
FITEM,4,-8074
FITEM,4,8609
FITEM,4,8654
FITEM,4,-8658
FITEM,4,8890
FITEM,4,-8900
FITEM,4,9440
FITEM,4,-9494
FITEM,4,11926
FITEM,4,-11936
FITEM,4,12432
FITEM,4,-12442
FITEM,4,12982
FITEM,4,-13036
FITEM,4,15470
FITEM,4,15515
FITEM,4,-15526
FITEM,4,16056
FITEM,4,16113
FITEM,4,16158
FITEM,4,-16168
FITEM,4,16665
FITEM,4,16710
FITEM,4,-16720
FITEM,4,17206
FITEM,4,17262
FITEM,4,-17272
FITEM,4,17769
FITEM,4,17814
FITEM,4,-17824
FITEM,4,18310
FITEM,4,18366
FITEM,4,-18376
FITEM,4,18872
FITEM,4,-18882
FITEM,4,19378
FITEM,4,-19388
CP,1,UY,P51X

acel,,9.8

allsel,all
finish

/solu
nsel,s,loc,y,0
d,all,all
  allsel
nsel,s,loc,y,0.54
d,all,ux
d,all,uz

allsel
antype,static
outres,basic,all       !輸出選項
outpr,basic,all       !窗口輸出，這個沒什么影響
autots,on             !自動計算時間步長
nlgeom,on          !打開是大變形，非線性
outres,all,all    !輸出所有子步結(jié)果
time,1
allsel

d,14,uy,-0.01

nsubst,300             !荷載子步
neqit,20
eqslv,-1
ncnv,1             !終止分析選項，終止分析且退出程序
lnsrch,on          !線性搜索，使計算穩(wěn)定
cnvtol,u,,0.015
allsel
solve

/post1
allsel
plnsol,s,eqv,0,1    !應(yīng)力云圖

  allsel
vsel,s,volue,,1,10,3
eslv,r
plnsol,s,eqv,0,1    !內(nèi)鋼管應(yīng)力圖

   allsel
VSEL, , , ,1
eslv,r
plnsol,s,eqv,0,1    !內(nèi)鋼管剖面應(yīng)力圖

allsel
vsel,s,volue,,3,12,3
eslv,r
plnsol,s,eqv,0,1    !外鋼管應(yīng)力圖

   allsel
VSEL, , , ,3
eslv,r
plnsol,s,eqv,0,1    !外鋼管剖面應(yīng)力圖

   allsel
VSEL,s ,volue , ,2,11,3
eslv,r
plnsol,s,eqv,0,1    !混凝土應(yīng)力圖

   allsel
VSEL, , , ,2
eslv,r
plnsol,s,eqv,0,1    !混凝土剖面應(yīng)力圖

/post26          !極限承載力（耦合提法）
nsol,2,14,u,y
rforce,3,14,f,y
/axlab,x,deflection(m)
/axlab,y,totle load(N)>
/xrange,0
/yrange,0
prod,2,,,,,,,-1
prod,3,,,,,,,-1
xvar,2
plvar,3

出現(xiàn)以下警告和錯誤提結(jié)果大體符合但不完整，得不到位移荷載曲線平滑段，只計算幾步就不算了

*** WARNING ***                      CP =    302.377 TIME= 16:38:57
There are 3 small equation solver pivot terms.

*** WARNING ***                      CP =    322.407 TIME= 16:39:18
There are 7 small equation solver pivot terms.

*** WARNING ***                      CP =    343.031 TIME= 16:39:38
There are 22 small equation solver pivot terms.

*** WARNING ***                      CP =    364.684 TIME= 16:40:00
There are 112 small equation solver pivot terms.

*** WARNING ***                      CP =    753.188 TIME= 16:46:32
There are 2 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP =    779.787 TIME= 16:46:59
There are 3 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP =    803.234 TIME= 16:47:23
There are 18 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP =    864.074 TIME= 16:48:24
There are 2 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP =    909.751 TIME= 16:49:10
There are 7 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP =    932.855 TIME= 16:49:33
There are 31 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP = 1014.865 TIME= 16:50:56
There are 4 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP = 1085.361 TIME= 16:52:07
There are 1 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP = 1110.540 TIME= 16:52:32
There are 11 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP = 1136.358 TIME= 16:52:58
There are 107 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP = 1170.304 TIME= 16:53:32
There are 4 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP = 1198.244 TIME= 16:54:00
There are 12 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP = 1223.422 TIME= 16:54:25
There are 25 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP = 1243.141 TIME= 16:54:45
There are 241 small equation solver pivot terms.

*** WARNING *** SUPPRESSED MESSAGE CP = 1277.024 TIME= 16:55:19
There are 4 small equation solver pivot terms.

*** ERROR ***    SUPPRESSED MESSAGE CP = 1298.459 TIME= 16:55:41
Equivalent plastic strain increment has exceeded the specified limit
value.  Since the time increment has reached the minimum value, the
analysis is stopped.

出現(xiàn)以上錯誤，只加載幾步，應(yīng)力應(yīng)變都還很小的時候就不算了，得不到荷載位移曲線的平滑段啊，求指導(dǎo)

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1樓 2014-10-04 12:03:54

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【答案】應(yīng)助回帖

看看約束條件還有荷載的定義、材料屬性？

贊一下

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~~~~~

2樓2014-10-11 11:51:53

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