非线性分析----钢球与平面的接触分析，请分析结果的正确性

showmemy

本人做了一个钢球与平板接触的例子，命令流如下
finish
/clear
/filename,jiechu
/prep7
/title,yingli


ET,1,182,1,,2
MP,EX,1,16E6
MP,NUXY,1,0.33
MP,MU,1,0.3
TB,MISO,1,0,9
TBPT,,0.000625,10000
TBPT,,0.0025,15000
TBPT,,0.005,21000
TBPT,,0.01,29000
TBPT,,0.015,32600
TBPT,,0.02,34700
TBPT,,0.04,36250
TBPT,,0.10,39000
TBPT,,0.20,40250

rectng,0,2,0,0.25
esize,0.04
amesh,all
wpoffst,1,1
csys,4
k,10
k,11,0,0,5

circle,10,0.75,11
ldele,5,6,1,1

et,2,169
et,3,171
r,3,0.75,,1,0.1
rmore,0.1,0.01

real,3
type,2
mat,1
lsel,s,,,7,8
lmesh,all
kmesh,10
ksel,s,kp,,10
nslk,s
*get,mnode,node,,num,max

alls
type,3
mat,1
lsel,s,,,3
nsll,s,1
esurf
alls
dl,1,,uy
d,27,ux
/solu
antype,0
nlgeom,on
SOLC,ON
autots,on
outres,all,all
neqit,30
deltim,0.4
f,mnode,fy,-20000
time,2
solve


当仅改变子步数量或者改变时间步长时，计算结果相差很大，为什么会出现这种情况呢。

showmemy

计算结果如上图所示，请帮我分析下为什么时间步长不同结果相差很大呢

hylovegj

发帖请注意版块！这里是Patran版块，不是ANASYS版块！