**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 both be changed to 200.  
**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
*IMPEDANCE PROPERTY, NAME=CARPET
,0.0005e9
****------------------------------------------------
*STEP
*FREQUENCY,normalization=mass
<nfreq>,,200
*OUTPUT, FIELD,FREQ=0
*ENDSTEP
**------------------------------------------------
*STEP
*STEADY STATE DYNAMICS,INTERVAL=RANGE, SUBSPACE=constant
**SUBSPACE PROJECTION
35,120,<npts>
*SIMPEDANCE,PROPERTY=carpet
air_impedance,
*CLOAD
cabin-1_chassis_load_1, 3, 100.0
cabin-1_chassis_load_2, 3, 50.0
**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,
*END STEP