题目是在工作压力为31-1MPa循环下 进行疲劳分析。在后处理阶段采用load case 1减去 load case 2,得到应力幅值。但出现了两个错误,求好心人帮忙指导下,万分感谢!!!!!!!!!
error1
error2
我的加载命令流和后处理命令流如下:
/SOL
!位移约束
ASEL,S,LOC,z,0
DA,all,SYMM
ALLSEL,ALL
DA,11,Uy,0
DA,25,Uy,0
D,53229, ,0, , , ,UX, , , , ,
!力约束
TIME,1
!在内表面加最大工作压力31MPa
FLST,2,24,5,ORDE,24
FITEM,2,1
FITEM,2,18
FITEM,2,36
FITEM,2,41
FITEM,2,50
FITEM,2,57
FITEM,2,61
FITEM,2,65
FITEM,2,73
FITEM,2,77
FITEM,2,81
FITEM,2,-82
FITEM,2,87
FITEM,2,90
FITEM,2,94
FITEM,2,96
FITEM,2,98
FITEM,2,114
FITEM,2,144
FITEM,2,146
FITEM,2,152
FITEM,2,156
FITEM,2,190
FITEM,2,194
SFA,P51X,1,PRES,31
!接管等效拉应力
FLST,2,12,5,ORDE,12
FITEM,2,49
FITEM,2,72
FITEM,2,91
FITEM,2,95
FITEM,2,103
FITEM,2,107
FITEM,2,113
FITEM,2,143
FITEM,2,180
FITEM,2,184
FITEM,2,189
FITEM,2,193
SFA,P51X,1,PRES,-12.4
!裙座等效压应力
FLST,2,2,5,ORDE,2
FITEM,2,15
FITEM,2,29
SFA,P51X,1,PRES,4.6
!模型内压31MPa
FLST,2,20,5,ORDE,20
FITEM,2,4
FITEM,2,12
FITEM,2,22
FITEM,2,26
FITEM,2,33
FITEM,2,37
FITEM,2,42
FITEM,2,58
FITEM,2,62
FITEM,2,66
FITEM,2,-67
FITEM,2,78
FITEM,2,83
FITEM,2,99
FITEM,2,111
FITEM,2,119
FITEM,2,124
FITEM,2,135
FITEM,2,141
FITEM,2,161
SFA,P51X,1,PRES,31
alls
solve
save
TIME,2 ! 第2载荷步对应最低工作压力
alls
SFADELE,all,1,pres ! 删除所有面载荷
!在内表面加最小工作压力1MPa
!接管内压1MPa
FLST,2,24,5,ORDE,24
FITEM,2,1
FITEM,2,18
FITEM,2,36
FITEM,2,41
FITEM,2,50
FITEM,2,57
FITEM,2,61
FITEM,2,65
FITEM,2,73
FITEM,2,77
FITEM,2,81
FITEM,2,-82
FITEM,2,87
FITEM,2,90
FITEM,2,94
FITEM,2,96
FITEM,2,98
FITEM,2,114
FITEM,2,144
FITEM,2,146
FITEM,2,152
FITEM,2,156
FITEM,2,190
FITEM,2,194
SFA,P51X,1,PRES,1
!接管等效拉应力
FLST,2,12,5,ORDE,12
FITEM,2,49
FITEM,2,72
FITEM,2,91
FITEM,2,95
FITEM,2,103
FITEM,2,107
FITEM,2,113
FITEM,2,143
FITEM,2,180
FITEM,2,184
FITEM,2,189
FITEM,2,193
SFA,P51X,1,PRES,-0.4
!裙座等效压应力
FLST,2,2,5,ORDE,2
FITEM,2,15
FITEM,2,29
SFA,P51X,1,PRES,4.6
!模型内压1MPa
FLST,2,20,5,ORDE,20
FITEM,2,4
FITEM,2,12
FITEM,2,22
FITEM,2,26
FITEM,2,33
FITEM,2,37
FITEM,2,42
FITEM,2,58
FITEM,2,62
FITEM,2,66
FITEM,2,-67
FITEM,2,78
FITEM,2,83
FITEM,2,99
FITEM,2,111
FITEM,2,119
FITEM,2,124
FITEM,2,135
FITEM,2,141
FITEM,2,161
SFA,P51X,1,PRES,1
alls
solve
save
fini
! ****** 后处理 ***********
/POST1 ! 进入后处理
LCDEF,1,1 ! 定义第一载荷步为load case 1
LCDEF,2,2 ! 定义第二载荷步为load case 2
LCASE,1 ! 读入load case 1
LCOPER,SUB,2 ! 减去load case 2
LCWRITE,3 ! 将计算结果存为load case 3
PLNSOL, S,INT, 0,1.0
就是出入后处理命令流后,出现如图问题,真心求指导~
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