Can a CMS superelement be prestressed?


Yes. Please see the following example:


fini
/clear

/filnam,part1 ! Name files for part 1

/prep7
et,1,185,,2
mp,ex,1,1e7
mp,nuxy,1,0
mp,dens,1,.0003
mp,alpx,1,1e-4

block,,9.9,,1,,1
block,10,20,,1,,1
esize,1
vmesh,all

et,2,170
et,3,174
mp,mu,3,.3
nsel,s,loc,x,9.9
type,2
esurf

type,3
mat,3
nsel,s,loc,x,10.0
esurf
nsel,all

nsel,s,loc,x,0
nsel,a,loc,x,20
d,all,all
nsel,all

!!! tref,0
!!! tunif,55
fini

/solu
inistate,define,,,,,-60000
kbc,0
outres,all,1
nsub,10
time,1
pstres,on
ematwrite,yes
solve
fini

/solu
antype,substr ! CMS generation pass
ddele,all,all
nsel,s,loc,x,8,9
m,all,all
nsel,all

pstres,on
seopt,part1,2 ! Stiffness and mass matrices
cmsopt,fix,5 ! 5 modes by fixed interface
solve ! Generation
save ! Save part database
finish

/post1
set,1,1
plns,u,sum ! contact not satisfied and deleted constraints still there





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