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请高人指点一下 钢筋混凝土梁的非线性问题（算了几步就进行不下去了:@( ）
/COM,
/COM,Preferences for GUI filtering have been set to display:
/COM, Structural
!*
/PREP7
!*
ET,1,SOLID65
!*
ET,2,LINK8
!*
ET,3,SOLID45
R,1, , , , , , ,
RMORE, , , , , , ,
RMORE, ,
!*
R,2,201.1,0,
!*
R,3,78.5,0,
!*
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,3.105e4
MPDATA,PRXY,1,,0.3
TB,MISO,1,1,18,0
TBTEMP,0
TBPT,,0.0002,6.21
TBPT,,0.0004,8.693
TBPT,,0.0006,12.106
TBPT,,0.0008,14.904
TBPT,,0.0010,17.095
TBPT,,0.0012,18.685
TBPT,,0.0014,19.681
TBPT,,0.00164,20.1
TBPT,,0.0018,19.866
TBPT,,0.002,19.075
TBPT,,0.0022,17.975
TBPT,,0.0024,16.760
TBPT,,0.0026,15.534
TBPT,,0.0028,14.372
TBPT,,0.0030,13.300
TBPT,,0.0032,12.326
TBPT,,0.0034,11.450
TBPT,,0.0036,10.664
TB,CONC,1,1,9,
TBTEMP,0
TBDATA,,0.5,0.9,2.01,-1,,
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,2,,2.0e5
MPDATA,PRXY,2,,0.3
TB,BISO,2,1,2,
TBTEMP,0
TBDATA,,500,0,,,,
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,3,,2.0e5
MPDATA,PRXY,3,,0.3
TB,BISO,3,1,2,
TBTEMP,0
TBDATA,,300,0,,,,
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,4,,3.0e4
MPDATA,PRXY,4,,0.3
BLOCK,0,2000,0,400,0,-250,
/VIEW,1,1,1,1
/ANG,1
/REP,FAST
VATT, 1, 1, 1, 0
LSEL,S,LINE,,4,5,1
LSEL,A,LINE,,2,7,5
LESIZE,ALL,50
LSEL,INVE
LESIZE,ALL,25
LSEL,ALL
VMESH,ALL
!*************箍筋单元的建立************
NSEL,S,LOC,X,75,125
NPLOT
/VIEW,1,1
/REP,FAST
/PNUM,NODE,1
/REPLOT
TYPE,2
MAT,3
REAL,3
!通过循环建立第一圈箍筋
*DO,I,2664,2671,1
E,I,I+1
*ENDDO
*DO,I,2538,2545,1
E,I,I+1
*ENDDO
*DO,I,2546,2663,9
E,I,I+9
*ENDDO
*DO,I,2538,2655,9
E,I,I+9
*ENDDO
!复制第一圈箍筋，每隔100mm布置一圈箍筋
ESEL,S,TYPE,,2
EGEN,11,270,ALL,,,,,,,,100,0,0,
ALLSEL,ALL
!建立纵筋单元
TYPE,2
MAT,2
REAL,2
*DO,I,2529,7524,135
E,I,I+135
*ENDDO
ESEL,R,REAL,,2
EGEN,3,4,ALL,,,,,,,,0,0,100,
*DO,I,2403,7398,135
E,I,I+135
*ENDDO
*DO,I,2411,7406,135
E,I,I+135
*ENDDO
FLST,2,2,1
FITEM,2,7659
FITEM,2,2402
E,P51X
FLST,2,2,1
FITEM,2,7663
FITEM,2,2342
E,P51X
FLST,2,2,1
FITEM,2,7667
FITEM,2,2282
E,P51X
FLST,2,2,1
FITEM,2,7533
FITEM,2,2388
E,P51X
FLST,2,2,1
FITEM,2,7541
FITEM,2,2268
E,P51X
!*************垫块单元的建立************
BLOCK,50,350,400,425,0,-250,
BLOCK,950,1250,0,-25,0,-250,
VATT,4,,3
LSEL,S,LINE,,16,17,1
LSEL,A,LINE,,28,29,1
LSEL,A,LINE,,14,19,5
LSEL,A,LINE,,26,31,5
LESIZE,ALL,50
LSEL,INVE
LESIZE,ALL,25
LSEL,ALL
VMESH,ALL
ALLSEL,ALL
NUMMRG,NODE,0,,,LOW
NUMCMP,NODE
NUMMRG,KP,0,,,LOW
NUMCMP,KP
!*************施加位移约束************
NSEL,S,LOC,Y,-25,-25
NSEL,R,LOC,X,1100,1100
D,ALL,,,,,,,UY,UZ,,,
ALLSEL,ALL
ASEL,S,LOC,X,2000,2000
DA,6,SYMM
ALLSEL,ALL
NSEL,S,LOC,Y,425,425
NSEL,R,LOC,X,200,200
NSEL,R,LOC,z,-125,-125
F,ALL,FY,-100000
ALLSEL,ALL
!*************进入求解器************
/SOL
!*
CNVTOL,U, ,0.05,0, ,
!*
ANTYPE,0
NLGEOM,1 !打开大变形
NSUBST,50,, !子部
OUTRES,ERASE
OUTRES,ALL,1 !输出所有子部
AUTOTS,1 !打开自动时间步长
LNSRCH,1 !线性搜索
NEQIT,50 !迭代步数
PRED,ON,,ON !预测开关
TIME,1 !荷载步结束时间
SOLVE
出错信息：
One or more elements have become highly distorted. Excessive
distortion of elements is usually a symptom indicating the need for
corrective action elsewhere. Try incrementing the load more slowly
(increase the number of substeps or decrease the time step size). You
may need to improve your mesh to obtain elements with better aspect
ratios. Also consider the behavior of materials, contact pairs,
and/or constraint equations. If this message appears in the first
iteration of first substep, be sure to perform element shape checking. |
发表于 2008-10-31 10:36
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发表于 2008-10-31 10:38
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