关于回弹警告和错误
最近在学习回弹算法。从论坛上下载到一个实例，经过仔细查看，发现步骤应该没有问题。却出现不少警告和错误。请问做过回弹的朋友，是不是显式过渡到隐式计算时候，会出现如同：
1，必须设置关闭单元形状检测，可是会出现警告： Deactivation of element shape checking is not recommended.
2， 只选择板料节点，忽视刚体时候，提示警告： Out of the 535 defined elements, only 50 elements are selected.
3，还有如同：
*** WARNING ***
The program chosen initial timestep/load-factor is arbitrary.It isnecessary for the user to supply a suitable initialtimestep/load-factor through the NSUB or DELTIM command forconvergence and overall efficiency.
*** WARNING ***
Element order list length 535 does not match number of selected element 50
New order vector being created.
*** WARNING ***
There are 1 small equation solver pivot terms.
*** WARNING *** SUPPRESSED MESSAGE
The calculated reference MOMENT CONVERGENCE VALUE = 1.395454264E-04 is less than 1E-2 a threshold zero, A value of 1E-2 or specified MINREF is used.Check results carefully.
这些警告是不是无法避免的？
4，步骤没有错，竟然不收敛，是什么原因，难道只有通过设置收敛准则吗？
*** ERROR *** SUPPRESSED MESSAGE
Solution not converged at time 1.E-02 (load step 1 substep 12). Run terminated.
*** WARNING *** SUPPRESSED MESSAGE
The unconverged solution (identified as time 1.E-02 substep 999999) is output for analysis debug purposes.Results should not be used for any other purpose.
附：
得出上面问题的名流，请大侠们帮忙看下。
! stamp.inp is used in the Chapter 10 exercise
/title,Explicit-to-Implicit Sequential Solution (Springback Example)
/filnam,stamp
/prep7
/view,,1,2,3
/plopts,info,1
/pnum,mat,1
/num,1
et,1,SHELL163
keyopt,1,1,10 ! 10th element formulation recommended for springback
r,1,,3,0.05
edshell,,,1 ! membrane straining causes thickness change (default)
et,2,SOLID164
r,2
et,3,SOLID164
r,3
mp,ex,1,30e6
mp,nuxy,1,0.29
mp,dens,1,2.28e-3
tb,biso,1,1
tbdata,1,30e3,100e3
edmp,hgls,1,5
mp,ex,2,30e6
mp,nuxy,2,0.29
mp,dens,2,2.28e-3
edmp,rigid,2,6,7
mp,ex,3,30e6
mp,nuxy,3,0.29
mp,dens,3,2.28e-3
edmp,rigid,3,7,7
wpoffs,,-0.069
wprota,,-90
rectng,-0.99,-0.01,0.01,0.49
type,1
mat,1
real,1
lesize,1,,,10,1
lesize,2,,,5,1
lesize,3,,,10,1
lesize,4,,,5,1
amesh,1
wpcsys,-1,0
wpstyl
esize,0.1
k, 11, 0.00, 0.00, 0.00
k, 12, 0.00, 0.50, 0.00
k, 13,-1.00, 0.50, 0.00
k, 14,-1.00, 0.10, 0.00
k, 15, 0.50, 0.05, 0.00
k, 16, 0.00,-0.50, 0.00
k, 17, 0.00,-0.20, 0.00
k, 18,-1.00,-0.10, 0.00
k, 19,-1.00,-0.50, 0.00
k, 20, 0.50,-0.15, 0.00
l,11,12
l,12,13
l,13,14
larc,14,11,15,6
al,5,6,7,8
mat,2
amesh,2
l,16,17
larc,17,18,20,6
l,18,19
l,19,16
al,9,10,11,12
mat,3
amesh,3
esize,,5
mat,2
type,2
voffst,2,-0.5
aclear,2
mat,3
type,3
voffst,3,-0.5
aclear,3
eplot
edwrite,pcreate
edwrite,plist
edcgen,assc
fini
/solu
esel,s,mat,,1
cm,eblank,elem
nsle
cm,nblank,node
nsel,r,loc,x,-0.995,-0.985
nsel,u,loc,z,-0.485,-0.015
d,all,ux,0.0
nsel,r,loc,z,-0.495,-0.485
d,all,uz,0.0
esel,s,mat,,2
cm,epunch,elem
nsle
cm,npunch,node
esel,s,mat,,3
cm,edie,elem
nsle
cm,ndie,node
nsel,all
esel,all
! Punch displacement function = (amplitude*cos(omega*time))-amplitude
*dim,time1,,101,1,1 ! dimension array for time
*dim,disp1,,101,1,1 ! dimension array for punch displacement
curtime=0.0 ! initialize current time to zero
tottime=0.0101 ! total load curve time, seconds
deltime=tottime/100.0 ! time increment, seconds
amp1=0.0825 ! displacement amplitude, inches
omega1=180.0/tottime ! product of this constant and time = wt
*afun,deg ! work in degrees
*do,i,1,101,1
time1(i,1,1)=curtime
disp1(i,1,1)=(amp1*cos(omega1*curtime))-amp1! maximum uy = -0.165"
curtime=curtime+deltime
*enddo
edload,add,rbuy,,2,time1,disp1,0 ! punch = part number 2
time,0.01
edrst,50
edhtime,100
edhist,nblank
edhist,eblank
edenergy,1,1,1,1
edout,glstat
save
eplot
SAVE
/STAT,SOLU
SOLVE
ESEL,S,MAT,,1
NSLE,S
FINISH
/POST1
SET,LAST
!*
/DSCALE,1,1.0
/REPLOT
!*
!*
PLNS,S,EQV
ANDATA,0.5, ,0,1,51,5,0,0
!*
FINISH
/POST26
NUMVAR,30,
FILE,stamp,his,
!*
!*
!*
!*
NSOL,2,2,U,Y,node2uy
!*
STORE,MERGE, ,
PLVAR,2, , , , , , , , , ,
ALLSEL,ALL
SAVE
!*
!*
FINISH
/FILNAM,spring
!*
/PREP7
ETCHG,ETI
!*
TBDELE,ALL,ALL, ,
SHPP,OFF
!*
UPGEOM,1,1,51,stamp,rst,
!*
EPLOT
ESEL,S,MAT,,1
NSLE,S
EPLOT
FINISH
/SOLU
FLST,2,2,1,ORDE,2
FITEM,2,1
FITEM,2,17
!*
/GO
D,P51X, ,0.0, , , ,UY, , , , ,
RIMPORT,DYNA,STRESS,ELEM,1,51,stamp,rst,
!*
NLGEOM,1
NROPT,AUTO, ,
LUMPM,0
EQSLV,SPAR, ,0,
PREC,0
PIVCHECK,1
SSTIF
PSTRES
TOFFST,0,
!*
SAVE
/STAT,SOLU
SOLVE
FINISH
/POST1
SET,LAST
!*
/DSCALE,1,10.0
/REPLOT
!*
*SET,_ZF,1
AVPRIN,0,0,
!*
/EFACE,_ZF
PLNSOL,U,SUM,2,1
FINISH
!*
! /EXIT,NOSAV
最后谢谢大家！ 正在学习
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