**
** couplings with cabin bottom
**
*NSET,NSET=SEAT_TRK_LT_889
*SURFACE,NAME=SEAT_TRK_CAB_BT_LT_889,TYPE=NODE
SEAT_TRK_LT_889,1.0
*COUPLING,REF NODE=8064,SURFACE=SEAT_TRK_CAB_BT_LT_889,CONSTRAINT NAME=SEAT_TRA_CAB_BT_LT1
*DISTRIBUTING
**-----------------------------------------------------
*NSET,NSET=SEAT_TRK_LT_890
*SURFACE,NAME=SEAT_TRK_CAB_BT_LT_890,TYPE=NODE
SEAT_TRK_LT_890,1.0
*COUPLING,REF NODE=8052,SURFACE=SEAT_TRK_CAB_BT_LT_890,CONSTRAINT NAME=SEAT_TRA_CAB_BT_LT2
*DISTRIBUTING
**-----------------------------------------------------
*NSET,NSET=SEAT_TRK_RT_891
*SURFACE,NAME=SEAT_TRK_CAB_BT_RT_891,TYPE=NODE
SEAT_TRK_RT_891,1.0
*COUPLING,REF NODE=8552,SURFACE=SEAT_TRK_CAB_BT_RT_891,CONSTRAINT NAME=SEAT_TRA_CAB_BT_RT1
*DISTRIBUTING
**-----------------------------------------------------
*NSET,NSET=SEAT_TRK_RT_892
*SURFACE,NAME=SEAT_TRK_CAB_BT_RT_892,TYPE=NODE
SEAT_TRK_RT_892,1.0
*COUPLING,REF NODE=8564,SURFACE=SEAT_TRK_CAB_BT_RT_892,CONSTRAINT NAME=SEAT_TRA_CAB_BT_RT2
*DISTRIBUTING
**-----------------------------------------------------
** add dummy mass/rotary inertia to coupling ref nodes
*ELEMENT, TYPE=MASS, ELSET=seat_mass
*MASS, ELSET=seat_mass
<small_mass>,
*ELEMENT, TYPE=ROTARYI, ELSET=seat_rotary
*ROTARY INERTIA, ELSET=seat_rotary
<small_rota>,<small_rota>,<small_rota>
**-----------------------------------------------------
*nset,nset=retained_seat,unsorted
*nset,nset=retained_all
retained_seat,
**