**CABIN-AIR MODEL FOR ACOUSTIC ANALYSIS
**  In order to reproduce the result in the example problem, COUPLED
**  ACOUSTIC-STRUCTRUAL ANALYSIS OF A PICKUP TRUCK, the parameters
**  <nfreq> and <npts> in tr_parameters.inp should be changed to 441 and 100
**  respectively; <nmode> should be changed to 25.
**PREPRINT,MODEL=YES,HISTORY=YES
*include, input=tr_parameters_inphase.inp
*include, input=tr_parameters.inp
**--------------------------------------------------
**PART INSTSTANCE CABIN-1
*include, input=tr_cabin_nodes.inp
*include, input=tr_cabin_nsets.inp
*include, input=tr_cabin_elements.inp
*include, input=tr_cabin_elsets.inp
*include, input=tr_cabin_sections.inp
*include, input=tr_cabin_air_w.inp
*TIE,type=nodetosurface,name=cabin,position tol=140
air-1_air_orphan, cabin-1_cabin
**-------------------------------------------------
** MATERIAL DEFINITIONS
*include, input=tr_materials_acous.inp
*CONNECTOR BEHAVIOR, NAME=conn_door_hinges_beh
*CONNECTOR ELASTICITY,COMPONENT=4
<conelPrevDoor>,
*Material, name=Elastic-Air
*Acoustic Medium
1.39E-1,
*Density
1.2E-12,
**------------------------------------------------
** lock the doors
*CONNECTOR MOTION
cabin-1_conn_door_lock_left_cabin_cart,   1,0.0
cabin-1_conn_door_lock_left_cabin_cart,   2,0.0
cabin-1_conn_door_lock_left_cabin_cart,   3,0.0
cabin-1_conn_door_lock_left_cabin_cart,   4,0.0
cabin-1_conn_door_lock_left_cabin_cart,   5,0.0
cabin-1_conn_door_lock_left_cabin_cart,   6,0.0
**
cabin-1_conn_door_lock_right_cabin_cart,   1,0.0
cabin-1_conn_door_lock_right_cabin_cart,   2,0.0
cabin-1_conn_door_lock_right_cabin_cart,   3,0.0
cabin-1_conn_door_lock_right_cabin_cart,   4,0.0
cabin-1_conn_door_lock_right_cabin_cart,   5,0.0
cabin-1_conn_door_lock_right_cabin_cart,   6,0.0
*BOUNDARY
cabin-1_retained_cabin_chassis_rear, 1,6,0
cabin-1_retained_cabin_radiator_chassis, 1,6,0
**------------------------------------------------
*STEP
*FREQUENCY,eigensolver=AMS,norm=mass, acoustic coupling = proj
<nfreq>,,200, ,,, 3
**------------------------------------------------
*OUTPUT, FIELD, MODE LIST
<nmode>,
*NODE OUTPUT
UT,POR
**------------------------------------------------
*ENDSTEP
*STEP
*STEADY STATE DYNAMICS,INTERVAL=RANGE
35,120,<npts>
*CLOAD
cabin-1_chassis_load_1, 3, 100.0
cabin-1_chassis_load_2, 3, 50.0
***
*OUTPUT, FIELD
*NODE OUTPUT
U,POR
*element output
INTEN
**displacements of seat hook-up points
**acoustic pressure at driver ear position
*output,history
*node output,nset=cabin-1_retained_cabin_chassis
u,
*node output,nset=air-1_ear_position
por,
** ENERGY OUTPUT
*output,history
*ENERGY OUTPUT
ALLKE, ALLKEA, ALLKEP,
ALLSE, ALLSEA, ALLSEP,
ALLVD, ALLVDE, ALLVDG, ALLVDM,
ALLWK
*energy print
*output, field, frequency = 10
*element output
EKEDEN,EKEDENA,EKEDENP,
ESEDEN,ESEDENA,ESEDENP,
EVDDEN,EVDDENG,EVDDENE,EVDDENM,
EHDDEN,EHDDENG,EHDDENE,EHDDENM
*END STEP
*****************************************