求助:非线性静力分析

我是初学ansys,但课题要求做非线性静力分析,就做了一个简单的例子,出现错误提示, one or more elements with highly distortion.
下面是命令流:
/PREP7
!*
ET,1,SOLID185
!*
!*
TB,HYPE,1,1,2,NEO
TBTEMP,0
TBDATA,,0.577,7.0e-5,,,,
BLOCK,0,0.04,0,0.03,0,0.02,
/VIEW,1,1,1,1
/ANG,1
/REP,FAST
FLST,5,1,4,ORDE,1
FITEM,5,7
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
!*
LESIZE,_Y1, , ,20, , , , ,1
!*
FLST,5,1,4,ORDE,1
FITEM,5,6
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
!*
LESIZE,_Y1, , ,15, , , , ,1
!*
FLST,5,1,4,ORDE,1
FITEM,5,11
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
!*
LESIZE,_Y1, , ,10, , , , ,1
!*
MSHAPE,0,3D
MSHKEY,1
!*
CM,_Y,VOLU
VSEL, , , , 1
CM,_Y1,VOLU
CHKMSH,'VOLU'
CMSEL,S,_Y
!*
VMESH,_Y1
!*
CMDELE,_Y
CMDELE,_Y1
CMDELE,_Y2
!*
FLST,2,1,5,ORDE,1
FITEM,2,4
!*
/GO
DA,P51X,ALL,
FLST,2,1,1,ORDE,1
FITEM,2,633
!*
/GO
F,P51X,FZ,-0.068
FINISH
/SOL
!*
ANTYPE,0
ANTYPE,0
NLGEOM,1
!*
!*
TIME,0
AUTOTS,1
DELTIM, , , ,1
KBC,0
!*
TSRES,ERASE
/STATUS,SOLU
SOLVE

帮忙看看是什么问题? 先谢谢了