How could a PSD response analysis of a fuel tank, including fuel, be done?


In the PSD analysis below, a 0.5 inch thick steel container is modeled with SHELL63. Inside the container, a fluid is modeled with FLUID80.


/prep7
et,1,80
mp,ex,1,1e7
mp,dens,1,.0001
block,,100,,100,,200
esize,50
vmesh,1

et,2,63
r,2,.5
mp,ex,2,3e7
mp,nuxy,2,0.4
mp,dens,2,.00075

type,2
real,2
mat,2
nsel,s,loc,x,0
nsel,a,loc,x,100
nsel,a,loc,y,0
nsel,a,loc,y,100
nsel,a,loc,z,200

esurf
alls

nsel,s,loc,z,0
d,all,all
nsel,all
fini

/solu
antype,modal
modop,lanb,10
mxpand,10
solve
fini

/solu
antyp,spectrum
spopt,psd
psdfrq,1,,1,100
psdval,1,1,1
nsel,s,loc,z,0
d,all,uy,1
nsel,all
pfact,1
psdcom
solve
fini

/post1
set,3,1
plns,uy





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