cm,fixedsu,node
allsel,all
! *** Material
mp,ex,1,27899996.8
mp,nuxy,1,0.3
mp,dens,1,2.587991718e-10
! *** Constraints
d,15,all,0
d,16,all,0
d,17,all,0
d,18,all,0
allsel,all
finish
! * Modal Analysis
! ****
/solution
antype,modal
modopt,lanb,5
mxpand,,,,yes! request the element results
solve
save! save the database for future reuse of MODE file
finish
/clear,nostart! clear the database to start a new analysis
/com,* X direction *****
/prep7
resume,,db! resume the database from the modal analysis
finish
/solution
antype,spectr
spopt,sprs,,,yes! reuse the existing mode file
dmprat,0.02
grp,0.001
svtyp,2
sed,1! X-direction base excitation
freq,3.1,4,5,5.8,7.1,8.8,11,14.1,17.2
freq,35,40,588
sv,0.02,400,871,871,700,1188,1188,440,775,775
sv,0.02,380,348.6,145
solve
sed,0
finish
/post1
/input,,mcom
prdi
finish
/copy,,mcom,,xdir,mcom
/clear,nostart
/com,* Y direction *****
/prep7
resume,,db! resume the database from the modal analysis
finish
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationExample Spectrum Analysis (Command or Batch Method)