**CABIN-AIR SUBSTRUCTURE FOR ACOUSTIC ANALYSIS
**  In order to reproduce the result in the example problem, COUPLED 
**  ACOUSTIC-STRUCTRUAL ANALYSIS OF A PICKUP TRUCK, the parameter 
**  <nfreq> in tr_parameters.inp should be changed to 200.  
*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
**----------------------------------
*step
*frequency, normalization=mass
<nfreq>,,200
**<neigenmodes>,
*BOUNDARY
cabin-1_retained_4_nodes, 1,6,0
*OUTPUT,FIELD,FREQ=0
*end step
**-----------------------------------
*step
*substructure generate, type=z41, overwrite, 
recovery matrix=<recov_yes_no>, mass matrix=yes,grav=no,
libr=tr_acous_cabin
**
**boundary,op=new
*RETAINED NODAL DOFS,sorted=no
cabin-1_retained_4_nodes,
*SELECT EIGENMODES,generate
2,<nfreq>,1
**1,<neigenmodes>,1
**
**can not apply load on retained nodes in the generation case?
**can not apply load on retained nodes when using the substructure? 
*substructure load case, name=case_1
*cload
cabin-1_chassis_load_1, 3, 1.0
*substructure load case, name=case_2
*cload
cabin-1_chassis_load_2, 3, 1.0
*substructure matrix output, stiffness=no, 
mass=no, recovery=no,grav=no,
file=lib_acous_cabin
*end step