lmesh,all
allsel,all
et,3,169
lsel,s,line,,1
type,3
real,2
esurf,,reverse
lmesh,all
allsel,all
!** Boundary Condition **
nsel,s,loc,x,5
d,all,all,0
nsel,all
allsel,all
nsel,s,loc,x,15
esln,s
cm,load,elem
allsel,all
nsel,s,loc,x,13,14
nsel,r,loc,y,40
cm,comp1,node
nsel,all
nrotate,all
finish
/SOLU! Enter the base nonlinear static analysis
antype,static
rescontrol,define,all,1
outres,all,all
nlgeom,on
nsubs,20,20,20
kbc,0
nsel,s,loc,x,15
f,all,fx,-3e4
allsel,all
solve! 1st loadstep
time,2.0
nsubs,20,20,20
kbc,0
f,comp1,fy,10
allsel,all
solve! 2nd loadstep
finish
/post1
set,last
/cycexpand,,on
esel,s,type,,2
!** Contact status after Base static analysis: sliding **
presol,cont,stat
esel,all
allsel,all
/cycexpand,,off
finish
/solu
antype,static,restart,,,perturb! Enter linear perturbed modal analysis
! by using last loadstep and substep.
perturb,modal,,current,allkeep! Keep all the loads as in Base static run.
solve,elform! First phase of linear perturbation
modopt,lanb,6
mxpand,6,,,yes
solve! Second phase of linear perturbation
finish! Completion of linear perturbation
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationExample Inputs for Linear Perturbation Analysis