Learning Forum

[inaamqazi]

1) what would constitute appropriate boundary conditions for a line model . I have applied uy and rotz at one end , ux at the top end, and symmetry boundary conditions on z axis.I have modelled half the length of the column But the non linear solution is terminating even if i increase the substeps significantly from 100 to 1000. I want to consider only geometric non linearity .I am solving in apdl

[ding]

Can you give me your apdl commands for detailed problems  or give me some model pictures ?

[inaamqazi]

/NOPR   ! Suppress printing of UNDO process 

/PMACRO ! Echo following commands to log    

FINISH  ! Make sure we are at BEGIN level   

/CLEAR,NOSTART  ! Clear model since no SAVE found   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

! WE SUGGEST YOU REMOVE THIS LINE AND THE FOLLOWING STARTUP LINES   

!*  

!*  

/NOPR   

KEYW,PR_SET,1   

KEYW,PR_STRUC,1 

KEYW,PR_THERM,0 

KEYW,PR_FLUID,0 

KEYW,PR_ELMAG,0 

KEYW,MAGNOD,0   

KEYW,MAGEDG,0   

KEYW,MAGHFE,0   

KEYW,MAGELC,0   

KEYW,PR_MULTI,0 

/GO 

!*  

!*  

/PREP7  

!*  

ET,1,BEAM188

!*  

KEYOPT,1,1,0

KEYOPT,1,2,0

KEYOPT,1,3,3

KEYOPT,1,4,0

KEYOPT,1,6,0

KEYOPT,1,7,0

KEYOPT,1,9,0

KEYOPT,1,11,0   

KEYOPT,1,12,0   

KEYOPT,1,15,0   

!*  

!*  

MPTEMP,,,,,,,,  

MPTEMP,1,0  

MPDATA,EX,1,,33500  

MPDATA,PRXY,1,,0.15 

SECTYPE,   1, BEAM, RECT, , 0   

SECOFFSET, CENT 

SECDATA,1500,5000,0,0,0,0,0,0,0,0,0,0   

N,1,0,0,,,,,

N,101,0,4400,,,,,   

!*  

FILL,1,101,99, , ,1,1,1,

!*  

/ZOOM,1,SCRN,0.341257,-0.888843,0.351177,-0.938430  

FLST,2,2,1  

FITEM,2,1   

FITEM,2,2   

E,P51X  

/AUTO,1 

/REP,FAST   

/ZOOM,1,SCRN,0.356137,-0.898760,0.385896,-0.935950  

FLST,4,1,2,ORDE,1   

FITEM,4,1   

EGEN,100,1,P51X, , , , , , , , , , ,

EPLOT   

/AUTO,1 

/REP,FAST   

FLST,2,1,1,ORDE,1   

FITEM,2,1   

!*  

/GO 

D,P51X, , , , , ,UY,ROTZ, , , , 

FLST,2,1,1,ORDE,1   

FITEM,2,101 

!*  

/GO 

D,P51X, , , , , ,UX, , , , ,

DSYM,SYMM,Z, ,  

!*  

FINISH  

/SOL

FLST,2,1,1,ORDE,1   

FITEM,2,101 

!*  

/GO 

F,P51X,FY,-1

!*  

ANTYPE,0

PSTRES,1

/STATUS,SOLU

SOLVE   

FINISH  

/POST1  

PLDISP,1

/VIEW,1,1,1,1   

/ANG,1  

/REP,FAST   

/AUTO,1 

/REP,FAST   

/DIST, 1 ,1.082226,1

/REP,FAST   

/DIST, 1 ,1.082226,1

/REP,FAST   

FINISH  

/SOL

!*  

ANTYPE,1

!*  

BUCOPT,LANB,5,0,0,CENTER

MXPAND,5,0,0,0,0.001,   

/STATUS,SOLU

SOLVE   

FINISH  

/POST1  

SET,LIST,999

SET,,, ,,, ,1   

/REPLOT 

SET,LIST,999

SET,,, ,,, ,1   

SET,LIST,999

/USER,  1   

/REPLO  

/REPLO  

FINISH  

/SOL

!*  

ANTYPE,0

FLST,2,1,1,ORDE,1   

FITEM,2,2   

!*  

/GO 

F,P51X,FX,3600000   

!*  

/PSF,PRES,NORM,2,0,1

/PBF,DEFA, ,1   

/PSYMB,CS,0 

/PSYMB,NDIR,0   

/PSYMB,ESYS,0   

/PSYMB,LDIV,0   

/PSYMB,LDIR,0   

/PSYMB,ADIR,0   

/PSYMB,ECON,0   

/PSYMB,XNODE,0  

/PSYMB,DOT,1

/PSYMB,PCONV,   

/PSYMB,LAYR,0   

/PSYMB,FBCS,0   

!*  

/PBC,ALL, ,1

/REP

!*  

/ZOOM,1,SCRN,0.283175,0.813653,0.376187,0.650922

!*  

/PSF,PRES,NORM,2,0,1

/PBF,DEFA, ,1   

/PSYMB,CS,0 

/PSYMB,NDIR,0   

/PSYMB,ESYS,0   

/PSYMB,LDIV,0   

/PSYMB,LDIR,0   

/PSYMB,ADIR,0   

/PSYMB,ECON,0   

/PSYMB,XNODE,0  

/PSYMB,DOT,1

/PSYMB,PCONV,   

/PSYMB,LAYR,0   

/PSYMB,FBCS,0   

!*  

/PBC,ALL, ,1

/REP

!*  

FLST,2,1,1,ORDE,1   

FITEM,2,101 

!*  

/GO 

F,P51X,FY,-2500000  

ANTYPE,0

NLGEOM,1

NSUBST,2000,0,0 

OUTRES,ERASE

OUTRES,ALL,ALL  

AUTOTS,1

NEQIT,2100  

RESCONTRL,DEFINE,ALL,ALL,-1 

/STATUS,SOLU

SOLVE   

FINISH  

/POST1  

PLDISP,1

/VIEW,1,1,1,1   

/ANG,1  

/REP,FAST   

/AUTO,1 

/REP,FAST   

!*  

/EFACET,1   

PLNSOL, U,SUM, 0,1.0

! SET,LIST,999  

SET,,, ,,, ,205 

/REPLOT 

FINISH  

/POST26 

FILE,'file','rst','.'   

/UI,COLL,1  

NUMVAR,200  

SOLU,191,NCMIT  

STORE,MERGE 

FILLDATA,191,,,,1,1 

REALVAR,191,191 

/DIST, 1 ,1.082226,1

/REP,FAST   

/DIST, 1 ,1.082226,1

/REP,FAST   

/DIST, 1 ,1.082226,1

/REP,FAST   

!*  

NSOL,2,1,U,X, UX_4, 

STORE,MERGE 

!*  

RFORCE,3,1,F,Y, FY_3

STORE,MERGE 

FINISH  

/AUX12  

FINISH  

/POST26 

NUMVAR,200  

FILLDATA,191,,,,1,1 

REALVAR,191,191 

XVAR,2  

PLVAR,3,

XVAR,2  

PLVAR,3,

NUMVAR,200  

FILLDATA,191,,,,1,1 

REALVAR,191,191 

XVAR,2  

PLVAR,3,

FINISH  

/POST1  

!*  

PRNSOL,U,COMP   

)/GOP    ! Resume printing after UNDO process   

)! We suggest a save at this point  

 

[inaamqazi]

@ding ..can you share your research gate profile so that we can remain in touch.

With Regards

Inaam