求助高手!急
本人在做毕业论文,是关于钢桁架的非线性屈曲问题,但是老是分析不出来结果,弹出不少的错误提示,急死人了!请各位高手一定要多指点一下!万分感谢!
下面是命令流!
/COM,Structural
!*
*SET,ROYXG,30
*SET,TYXG,3.5
*SET,RIYXG,ROYXG-TYXG
*SET,AYXG,3.1415926*(ROYXG**2-RIYXG**2)
*SET,ROLXG,24
*SET,TLXG,3.5
*SET,RILXG,ROLXG-TLXG
*SET,ALXG,3.1415926*(ROLXG**2-RILXG**2)
*SET,ROFG,24
*SET,TFG,3.5
*SET,RIFG,ROFG-TFG
*SET,AFG,3.1415926*(ROFG**2-RIFG**2)
/PREP7
!*
ET,1,LINK180
!*
R,1,AYXG,0,
!*
R,2,ALXG,0,
!*
R,3,AFG,0,
!*
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,206E3
MPDATA,PRXY,1,,0.3
TB,BKIN,1,1,2,1
TBTEMP,0
TBDATA,,235,6180,,,,
*do,i,1,12,1
n,i,i*3000-3000,354,0
*enddo
*do,i,13,24,1
n,i,i*3000-39000,-354,0
*enddo
*do,i,25,35,1
n,i,i*3000-73500,0,1320
*enddo
n,2000,16500,0,3000
TYPE,1
MAT,1
REAL,2
SECNUM, ,
*DO,I,1,11,1
e,I,I+1,2000
*ENDDO
*DO,I,13,23,1
e,I,I+1,2000
*ENDDO
REAL,1
*DO,I,25,34,1
e,I,I+1,2000
*ENDDO
REAL,3
*DO,I,1,12,1
E,I,I+12,2000
*ENDDO
*DO,I,25,35,1
E,I,I-24,2000
E,I,I-23,2000
E,I,I-12,2000
E,I,I-11,2000
*ENDDO
FINISH
/SOLU
FLST,2,2,1,ORDE,2
FITEM,2,1
FITEM,2,13
!*
/GO
D,P51X, ,0, , , ,ALL, , , , ,
FLST,2,2,1,ORDE,2
FITEM,2,25
FITEM,2,35
!*
/GO
D,P51X, ,0, , , ,UY, , , , ,
FLST,2,2,1,ORDE,2
FITEM,2,12
FITEM,2,24
!*
/GO
D,P51X, ,0, , , ,UY,UZ, , , ,
FLST,2,1,1,ORDE,1
FITEM,2,25
!*
/GO
F,P51X,FX,1000
FLST,2,1,1,ORDE,1
FITEM,2,35
!*
/GO
F,P51X,FX,-1000
FLST,2,2,1,ORDE,2
FITEM,2,1
FITEM,2,13
!*
/GO
F,P51X,FX,-500
FLST,2,2,1,ORDE,2
FITEM,2,12
FITEM,2,24
!*
/GO
F,P51X,FX,500
SAVE
!*
ANTYPE,0
NSUBST,50,0,0
OUTRES,ERASE
OUTRES,ALL,ALL
AUTOTS,1
LNSRCH,1
NEQIT,13
PRED,ON,,ON
PSTRES,1
SOLVE
FINISH
/SOLU
!*
ANTYPE,1
!*
!*
BUCOPT,LANB,3,0,0
!*
MXPAND,3,0,0,0,0.001,
SOLVE
FINISH
/POST1
SET,FIRST
PLDISP,0
FINISH
/SOL
UPCOORD,30,OFF
DOFSEL,S,FX
FSCALE,700,
DOFSEL,ALL
!*
ANTYPE,0
ANTYPE,0
NLGEOM,1
ARCLEN,1,2,0.5
ARCTRM,L
AUTOTS,-1.0
LNSRCH,-1
PRED,-1
PSTRES,1
RESCONTRL,DEFINE,ALL,ALL,1
!*
NLGEOM,1
NROPT,AUTO, ,
LUMPM,0
EQSLV, , ,0,
PRECISION,0
MSAVE,0
PIVCHECK,1
PSTRES,ON
TOFFST,0,
!*
!*
OUTPR,ALL,ALL,
SOLVE
弹出很多的错误出来!不明白为何!
*** WARNING *** CP = 6.391 TIME= 23:43:10
There are 2 small equation solver pivot terms.
*** WARNING *** CP = 6.469 TIME= 23:43:10
There are 2 small equation solver pivot terms.
*** WARNING *** CP = 6.594 TIME= 23:43:10
There are 2 small equation solver pivot terms.
*** WARNING *** CP = 6.750 TIME= 23:43:11
There are 2 small equation solver pivot terms.
*** WARNING *** CP = 6.859 TIME= 23:43:11
There are 2 small equation solver pivot terms.
*** WARNING *** SUPPRESSED MESSAGE CP = 6.969 TIME= 23:43:11
There are 2 small equation solver pivot terms.
*** WARNING *** SUPPRESSED MESSAGE CP = 7.031 TIME= 23:43:11
There are 2 small equation solver pivot terms.
*** WARNING *** SUPPRESSED MESSAGE CP = 7.109 TIME= 23:43:12
There are 2 small equation solver pivot terms.
*** WARNING *** SUPPRESSED MESSAGE CP = 7.219 TIME= 23:43:12
There are 2 small equation solver pivot terms.
*** WARNING *** SUPPRESSED MESSAGE CP = 7.328 TIME= 23:43:12
There are 2 small equation solver pivot terms.
*** ERROR *** CP = 9.016 TIME= 23:43:17
The value of UY at node 4 is 745551244.It is greater than the current
limit of 1000000.This generally indicates rigid body motion as a
result of an unconstrained model.Verify that your model is properly
constrained.
不明白为何老是出现这么多的错误?不知为何会说4节点的位移过大?
请大家多多指点!谢谢!
[ 本帖最后由 unmadn 于 2007-3-16 00:01 编辑 ]
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