*HEADING
 INDIAN POINT WITH SPRING SUPPORTS--THREE SUBSTRUCTURE MODEL
 3 SUBSTRUCTURES WITH "*MODAL DYNAMIC" FOR TIME HISTORIES
 REQUIRES SUBSTRUCTURE GENERATION FILES,indianpoint_3sub_gen1.inp
 indianpoint_3sub_gen2.inp and indianpoint_3sub_gen3.inp
** SUBSTRUCTURE USAGE LEVEL COMMANDS
**
*RESTART,WRITE,FREQUENCY=100
**
** SPRING DEFINITIONS
**
*NODE
*NGEN
*NGEN,LINE=C
*NODE
*NGEN
*NGEN,LINE=C
*NODE
*NGEN
*NGEN,LINE=C
*NODE,NSET=SPRS
*NSET,NSET=NPDR
*ELEMENT,TYPE=SPRINGA,ELSET=FWR11
*ELEMENT,TYPE=SPRINGA,ELSET=FWR13
*ELEMENT,TYPE=SPRINGA,ELSET=FWR14
*ELEMENT,TYPE=SPRINGA,ELSET=FWR17
*ELEMENT,TYPE=SPRINGA,ELSET=FWR18
*ELEMENT,TYPE=SPRINGA,ELSET=FWR20
*ELEMENT,TYPE=SPRINGA,ELSET=FWR21
*ELEMENT,TYPE=SPRINGA,ELSET=FWR23
*ELEMENT,TYPE=SPRINGA,ELSET=FWR25
*ELEMENT,TYPE=SPRINGA,ELSET=FWR24
*ELEMENT,TYPE=SPRINGA,ELSET=FWR27
*ELEMENT,TYPE=SPRINGA,ELSET=FWR28
*ELSET,ELSET=SPRINGS
FWR11, FWR13, FWR14, FWR17, FWR18, FWR20,
FWR21, FWR23, FWR24,  FWR25, FWR27, FWR28
*SPRING,ELSET=FWR11
17700.,
*SPRING,ELSET=FWR13
119600.,
*SPRING,ELSET=FWR14
403000.,
*SPRING,ELSET=FWR17
97900.,
*SPRING,ELSET=FWR18
228000.,
*SPRING,ELSET=FWR20
86300.,
*SPRING,ELSET=FWR21
86300.,
*SPRING,ELSET=FWR23
319000.,
*SPRING,ELSET=FWR24
56800.,
*SPRING,ELSET=FWR25
39100.,
*SPRING,ELSET=FWR27
55500.,
*SPRING,ELSET=FWR28
68000.,
*ELEMENT,TYPE=Z01,FILE=substr1,ELSET=ZALL
*ELEMENT,TYPE=Z02,FILE=substr2,ELSET=ZALL
*ELEMENT,TYPE=Z03,FILE=substr1,ELSET=ZALL
*SUBSTRUCTURE PROPERTY, ELSET=ZALL
*BOUNDARY
1,1,6
76,1,6
70,1
10,2
SPRS,1,3
 2,3,3
 4,3,3
 7,3,3
10,3,3
*NSET,NSET=SUP1
*NSET,NSET=SUP2
*NSET,NSET=SUP3
*NSET,NSET=SUPALL
SUP1,SUP2,SUP3
*NSET,NSET=SMALL
*STEP
     FREQUENCY EXTRACTION
*FREQUENCY, eigensolver=lanczos, SIM=NO
24, ,
*ELEMENT MATRIX OUTPUT,ELSET=ZALL,STIFFNESS=YES,MASS=YES,FREQUENCY=10
*MODAL FILE
*END STEP
*STEP,PERTURBATION
  SNAP LOAD---APPLIED STATICALLY
*STATIC
*EL PRINT,ELSET=SPRINGS
S,E
*CLOAD
25,3,7000.
*NODE PRINT,NSET=SMALL,FREQUENCY=100
U,
*SUBSTRUCTURE PATH, ENTER ELEMENT=103
*OUTPUT,FIELD,VAR=PRESELECT
*NODE PRINT
*EL PRINT
SF,
*SUBSTRUCTURE PATH, LEAVE, ENTER ELEMENT=102
*OUTPUT,FIELD,VAR=PRESELECT
*EL PRINT
SF,
*NODE PRINT
U ,
*SUBSTRUCTURE PATH, LEAVE
*ELEMENT MATRIX OUTPUT,ELSET=ZALL,STIFFNESS=YES,MASS=YES,FREQUENCY=0
*END STEP
*STEP
 RELEASE LOAD
*MODAL DYNAMIC,CONTINUE=YES
 0.02,10.0
*MODAL DAMPING,MODAL=DIRECT
*PRINT,FREQUENCY=100
*EL FILE,ELSET=SPRINGS,FREQUENCY=100
S,
*NODE FILE,NSET=SMALL,FREQUENCY=100
U,
V,
A,
*NODE PRINT,NSET=SMALL,FREQUENCY=100
U,
*EL PRINT,ELSET=SPRINGS,FREQUENCY=100
S,
*OUTPUT,FIELD, OP=NEW,FREQUENCY=999
*ELEMENT OUTPUT,ELSET=SPRINGS
S,
*NODE OUTPUT,NSET=SMALL
U,
V,
A,
*OUTPUT,HISTORY, OP=NEW, FREQUENCY=100
*ELEMENT OUTPUT,ELSET=SPRINGS
S,
*NODE OUTPUT,NSET=SMALL
U,
V,
A,
*END STEP