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/prep7
resume,dizhen,db
nSEL,S,LOC,Y,0  
D, all,all  
/solu
antype,modal
modopt,lanb,20,0,0,,off
mxpand,20,,,yes
outpr,basic,all
outres,all,all
allsel,all
solve
finish
/post1
set,list
set,1,1
pldisp,0
set,1,2
pldisp,0
set,1,3
pldisp,0
set,1,4
pldisp,0
fini
/config,statu
/solu
allsel
antype,trans
dampratio=0.05
pi=3.14159
freq1=2.24*pi
freq2=2.54*2*pi
alphad,2*dampratio*freq1*freq2/(freq1+freq2)
trnopt,full
timint,off
nlgeom,on
time,1e-8
nsubst,2
kbc,1
acel,0,-9.8
solve
timint,on
nt=1000
dt=0.01
*dim,ac,,nt
/input,tianjin,txt
nsubst,10,0,0
outpr,all,none
outres,all,none
outres,nsol,all
*do,i,1,nt
acel,0,ac(i),0
time,i*dt
solve
*enddo
finish
/post26
nsol,2,69,u,x
plvar,3,,,,,,,,,,

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