本帖最后由 modngmoon 于 2014-8-20 16:59 编辑
做焊接模拟时,温度场没问题,可是应力场老是说无法收敛,有没高手指导一下!求助!有酬金!我怀疑是约束问题,因为这个薄板有150毫米宽,300毫米长,只有12毫米厚,有没高手告诉一下,怎么加约束合适啊?
!!!!!!!!!!!!杀死单元
VSEL,S, , , 1
ESLV,S
CM,weld_elem,ELEM
ekill,all
allsel,all
esel,s,elem,,weld_elem
nsle,s
cm,weld_node,node
ALLSEL,ALL
ANTYPE,TRANS !瞬态分析
LNSRCH,ON
NLGEOM,ON
OUTPR,ALL,ALL !输出控制
OUTRES,ALL,ALL
AUTOTS,ON
cnvtol,u,,0.05 !位移控制求解收敛
ncnv,2
TIMINT,ON,all !打开时间积分,进行瞬态分析
KBC,1
allsel,all
*DO,I,0,N
YY=I*STEP
T=(YY+STEP)/V !!!!!!!每步焊接时间,时间跟踪
TIME,T
!!!!!!!生死单元的处理
wpcsys,-1,0
nsel,s,node,,weld_node
nsel,r,loc,y,YY,YY+chf
cm,cur_node,node
esln,s
ealive,all
allsel,all
nsel,s,node,,weld_node
nsel,u,node,,cur_node
cm,weld_node,node
allsel,all
BFDELE,ALL,TEMP
LDREAD,TEMP,,,T,,'welding_on_plate','RTH'
NSUBST,25,50,15
!阶跃加载方式
SOLVE
*ENDDO
allsel,all
TIME,T+1800
NSUBST,50,50,50
BFDELE,ALL,TEMP
LDREAD,TEMP,,,T+1800,,'welding_on_plate','RTH' !施加耦合场载荷
SOLVE
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