Is it possible to first run a modal analysis with a superelement and then expand the superelement
and run a single spectrum analysis and then look at the results from the spectrum analysis in the expanded
superelement?


Yes. Here is an example.

/filn,gen
/prep7
et,1,45
mp,ex,1,1e7
mp,nuxy,1,.3
mp,dens,1,.0003

block,,20,,12,,4
esize,2
vmesh,1

fini
/solu
antype,substr
seopt,sub1,2
m,all,all
solve
fini
save
/clear

/filn,use
/prep7
et,1,50
se,sub1
nsel,s,loc,x,0
d,all,all
nsel,all
fini

/solu
antyp,modal
modop,lanb,20
mxpand,20,
solve
fini

/solu
antype,spectrum
svtype,3
sed,,,1
freq,1,1000
sv,.02,1,1
srss ! use.mcom
solve
fini

/filn,gen
resume
/solu
antyp,substr
expass,on
seexp,sub1,use
numexp,all,,,yes
solve
fini

/post1
set,list ! all 20 modes expanded
/input,use,mcom
prdi
fini
/exit,nosa





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