*heading
freqency analysis of the cabin-air substructure (tr_acous_cabin_gen.inp)
**            cabin-air super element
** In order to reproduce the result in the example problem, COUPLED 
**  ACOUSTIC-STRUCTRUAL ANALYSIS OF A PICKUP TRUCK, the parameter 
**  <nfreq_minus> in tr_parameters.inp should both be changed to 199,
**  <nmode_minus> should be changed to 24.  
*include, input=tr_parameters_inphase.inp
*include, input=tr_parameters.inp
*node
41935, 1837.576, 740.3875, 617.6503
41922, 1857.688, -709.6696, 609.3147
41927, 4256.773, 567.58825, 551.844
41928, 4251.238, -567.079, 534.63595
*element, type=z41, elset=cabin_air, file=tr_acous_cabin
1001,41935, 41922, 41927, 41928
*substructure property,elset=cabin_air
*nset, nset=boun
41935, 41922, 41927, 41928
*step
*frequency,normalization=mass
<nfreq_minus>,
*boundary
boun,1,6,0
*substructure path, enter element=1001
*OUTPUT, FIELD, MODE LIST
<nmode_minus>
***NODE OUTPUT
***U,POR
*NODE OUTPUT,nset=CABIN-1_RETAINED_CABIN_CG
U,
*substructure path, leave
*endstep