ANSYS求解斜拉桥极限承载力方法与案例

命令流如下
finish$/clear$/filename,cablestayed bridge,1
/Title,The plastic anlysis of cable-stayed bridge
/replot
/prep7
et,1,link10$et,2,beam189$keyopt,2,7,1$et,3,beam54 !定义三种单元，主梁beam188,主塔beam54,拉索link10
mp,ex,1,2.05e11$mp,prxy,1,0.3
tb,bkin,1$tbdata,1,1.67e9,0.0 !定义拉索为BKIN，定义其弹性模量泊松比、屈服点
mp,ex,2,3.25e10$mp,prxy,2,0.17$mp,gxy,2,1.38e10
tb,bkin,2$tbdata,1,4e7,0.0 !定义主梁为BKIN，定义其弹性模量泊松比、屈服点
mp,ex,3,3.45e10$mp,prxy,3,0.17$mp,gxy,2,1.47e10
tb,bkin,3$tbdata,1,5e7,0.0 !定义主塔为BKIN，定义其弹性模量泊松比、屈服点
sectype,1,beam,mesh$secread,mybox,,,mesh
sectype,2,beam,i$secdata,5.28,5.28,4.6,0.6,0.6,2.7
r,1,0.0084,0.003315$r,2,0.0084,0.003216$r,3,0.0084,0.003114
r,4,0.0084,0.003009$r,5,0.0081,0.003005$r,6,0.0077,0.003035
r,7,0.0077,0.002906$r,8,0.0072,0.002964$r,9,0.0072,0.002816
r,10,0.0063,0.003043$r,11,0.0063,0.002866$r,12,0.0063,0.002688
r,13,0.0058,0.002727$r,14,0.0058,0.002542$r,15,0.0058,0.002371
r,16,0.0058,0.002372$r,17,0.0058,0.002542$r,18,0.0058,0.002727
r,19,0.0063,0.002699$r,20,0.0063,0.002866$r,21,0.0063,0.003043
r,22,0.0072,0.002816$r,23,0.0072,0.002964$r,24,0.0077,0.002906
r,25,0.0077,0.003035$r,26,0.0081,0.003005$r,27,0.0084,0.003008
r,28,0.0084,0.003114$r,29,0.0084,0.003216$r,30,0.0084,0.003314 !定义前30号索的实常数，后30号与前30号相同
r,32,15.52,34.4,4.6 !定义主梁和主塔的实常数
k,1$k,2,5.98$k,3,12.18$k,4,18.38$k,5,25.58$k,6,30.78$k,7,36.98
k,8,43.18$k,9,49.38$k,10,55.58$k,11,61.78$k,12,67.98$k,13,74.18
k,14,80.38$k,15,86.58$k,16,92.78$k,17,105$k,18,117.22$k,19,123.42
k,20,129.62$k,21,135.82$k,22,142.02$k,23,148.22$k,24,154.42$k,25,160.62
k,26,166.82$k,27,173.02$k,28,179.22$k,29,185.42$k,30,191.62$k,31,197.82
k,32,204.02$k,33,215.98$k,34,222.18$k,35,228.38$k,36,234.58$k,37,240.78
k,38,246.98$k,39,253.18$k,40,259.38$k,41,265.58$k,42,271.78$k,43,277.98
k,44,284.18$k,45,290.38$k,46,296.58$k,47,302.78$k,48,315$k,49,327.22
k,50,333.42$k,51,339.62$k,52,345.82$k,53,352.02$k,54,358.22$k,55,364.42
k,56,370.62$k,57,376.82$k,58,383.02$k,59,389.22$k,60,395.42$k,61,401.62
k,62,407.82$k,63,414.02$k,64,420
k,65,105,-1$k,66,105,23.1$k,67,105,26.88$k,68,105,29.61$k,69,105,31.83$k,70,105,33.75
k,71,105,35.49$k,72,105,37.11$k,73,105,38.65$k,74,105,40.12$k,75,105,41.55$k,76,105,42.94
k,77,105,44.31$k,78,105,45.65$k,79,105,46.97$k,80,105,48.27
k,81,315,-1$k,82,315,23.1$k,83,315,26.88$k,84,315,29.61$k,85,315,31.83$k,86,315,33.75
k,87,315,35.49$k,88,315,37.11$k,89,315,38.65$k,90,315,40.12$k,91,315,41.55$k,92,315,42.94
k,93,315,44.31$k,94,315,45.65$k,95,315,46.97$k,96,315,48.27$k,97,105,54$k,98,315,54
*Do,i,1,63
l,i,i+1
*enddo !主梁线单元
l,65,17$l,17,66
*Do,i,66,79
l,i,i+1
*enddo
l,80,97$l,81,48$l,48,82$l,82,83$l,83,84$l,84,85
l,85,86$l,86,87$l,87,88$l,88,89$l,89,90$l,90,91$l,91,92$l,92,93$l,93,94$l,94,95$l,95,96
l,96,98 !主塔线单元
l,2,80$l,3,79$l,4,78$l,5,77$l,6,76$l,7,75$l,8,74$l,9,73$l,10,72$l,11,71$l,12,70$l,13,69
l,14,68$l,15,67$l,16,66$l,18,66$l,19,67$l,20,68$l,21,69$l,22,70$l,23,71$l,24,72$l,25,73
l,26,74$l,27,75$l,28,76$l,29,77$l,30,78$l,31,79$l,32,80$l,33,96$l,34,95$l,35,94$l,36,93
l,37,92$l,38,91$l,39,90$l,40,89$l,41,88$l,42,87$l,43,86$l,44,85$l,45,84$l,46,83$l,47,82
l,49,82$l,50,83$l,51,84$l,52,85$l,53,86$l,54,87$l,55,88$l,56,89$l,57,90$l,58,91$l,59,92
l,60,93$l,61,94$l,62,95$l,63,96 !拉索线单元
dk,1,ux,uy$dk,64,ux,uy$dk,65,all$dk,81,all
lsel,s,line,,1,63,1
lesize,all,5
lsel,s,line,,1,63,1
latt,2,,2,,,,1
lsel,s,line,,64,97,1
latt,3,32,3,,,,2
lesize,all,1
lsel,s,line,,98
latt,1,1,1
lsel,s,line,,99
latt,1,2,1
lsel,s,line,,100
latt,1,3,1
lsel,s,line,,101
latt,1,4,1
lsel,s,line,,102
latt,1,5,1
lsel,s,line,,103
latt,1,6,1
lsel,s,line,,104
latt,1,7,1
lsel,s,line,,105
latt,1,8,1
lsel,s,line,,106
latt,1,9,1
lsel,s,line,,107
latt,1,10,1
lsel,s,line,,108
latt,1,11,1
lsel,s,line,,109
latt,1,12,1
lsel,s,line,,110
latt,1,13,1
lsel,s,line,,111
latt,1,14,1
lsel,s,line,,112
latt,1,15,1
lsel,s,line,,113
latt,1,16,1
lsel,s,line,,114
latt,1,17,1
lsel,s,line,,115
latt,1,18,1
lsel,s,line,,116
latt,1,19,1
lsel,s,line,,117
latt,1,20,1
lsel,s,line,,118
latt,1,21,1
lsel,s,line,,119
latt,1,22,1
lsel,s,line,,120
latt,1,23,1
lsel,s,line,,121
latt,1,24,1
lsel,s,line,,122
latt,1,25,1
lsel,s,line,,123
latt,1,26,1
lsel,s,line,,124
latt,1,27,1
lsel,s,line,,125
latt,1,28,1
lsel,s,line,,126
latt,1,29,1
lsel,s,line,,127
latt,1,30,1
lsel,s,line,,128
latt,1,1,1
lsel,s,line,,129
latt,1,2,1
lsel,s,line,,130
latt,1,3,1
lsel,s,line,,131
latt,1,4,1
lsel,s,line,,132
latt,1,5,1
lsel,s,line,,133
latt,1,6,1
lsel,s,line,,134
latt,1,7,1
lsel,s,line,,135
latt,1,8,1
lsel,s,line,,136
latt,1,9,1
lsel,s,line,,137
latt,1,10,1
lsel,s,line,,138
latt,1,11,1
lsel,s,line,,139
latt,1,12,1
lsel,s,line,,140
latt,1,13,1
lsel,s,line,,141
latt,1,14,1
lsel,s,line,,142
latt,1,15,1
lsel,s,line,,143
latt,1,16,1
lsel,s,line,,144
latt,1,17,1
lsel,s,line,,145
latt,1,18,1
lsel,s,line,,146
latt,1,19,1
lsel,s,line,,147
latt,1,20,1
lsel,s,line,,148
latt,1,21,1
lsel,s,line,,149
latt,1,22,1
lsel,s,line,,150
latt,1,23,1
lsel,s,line,,151
latt,1,24,1
lsel,s,line,,152
latt,1,25,1
lsel,s,line,,153
latt,1,26,1
lsel,s,line,,154
latt,1,27,1
lsel,s,line,,155
latt,1,28,1
lsel,s,line,,156
latt,1,29,1
lsel,s,line,,157
latt,1,30,1
allsel
lmesh,all
finish
/solu
SSTIF,ON
nlgeom,on
autots,on
time,100
nsubst,200
autots,off
outres,all,all
solve
finish
/post1
set,last
set,previous
*get,rtime,active,0,set,time
etable,MI,SMISC,2
etable,MJ,SMISC,15
plls,MI,MJ
求解后，所有应力图均为红色，不能得到正确的结果。
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