*HEADING
 SUBSTRUCTURE WITH FREQUENCY RESPONSE
 ANALYSIS FOR THE MODEL USING TIRE SUBSTRUCTURE 
 STEP 1:  EXTRACT FREQUENCIES
 STEP 2:  DIRECT SSD SOLUTION 
 STEP 3:  MODE-BASED SSD SOLUTION 
**
*NODE,NSET=RIM
150,
*NODE,NSET=ROAD
1
**
** SUBSTRUCTURE
**
*ELEMENT,TYPE=Z101,ELSET=SUPER,FILE=substructtire_generate
 1, 150, 1
*SUBSTRUCTURE PROPERTY, ELSET=SUPER
**
*NSET,NSET=QA_TEST_ROAD
ROAD
*NSET,NSET=NALL
ROAD,RIM
*NSET,NSET=QA_TEST_NALL
NALL
*STEP
 STEP 1: EXTRACT FREQUENCIES
*FREQUENCY,EIGENSOLVER=LANCZOS,normaliz=mass, residual modes
20,
**
*BOUNDARY
RIM,1,6
ROAD,1,2
ROAD,4,6
**
*LOAD CASE, NAME=ROAD_LOAD
*CLOAD
 ROAD,3,200.
*END LOAD CASE
**
*OUTPUT,FIELD,MODE LIST
2,5,6,8,10,12,14,16,17,20
*NODE OUTPUT,NSET=QA_TEST_NALL
U,
*OUTPUT,FIELD
*NODE OUTPUT,NSET=NALL
U,
*END STEP
************************************************
*STEP
 STEP 2: STEADY STATE DYNAMICS,DIRECT
*STEADY STATE DYNAMICS,DIRECT,INTERVAL=eigen
** use interval=eigen to reproduce the results in the manual
 40.,130.,7
*BOUNDARY
RIM,1,6
ROAD,1,2,
ROAD,4,6,
**
*CLOAD
 ROAD,3,200.
*OUTPUT,HISTORY,VARIABLE=PRESELECT
*NODE OUTPUT,NSET=QA_TEST_ROAD
U,
*END STEP
************************************************
*STEP
 STEP 3: STEADY STATE DYNAMICS,MODE BASED
*STEADY STATE DYNAMICS,INTERVAL=eigen
** use interval=eigen to reproduce the results in the manual
 40.,130.,7
**
*CLOAD
 ROAD,3,200.
*OUTPUT,HISTORY,VARIABLE=PRESELECT
*NODE OUTPUT,NSET=QA_TEST_ROAD
U,
*END STEP