*HEADING
 INDIAN  POINT  WITH SPRING SUPPORTS--SUBSTRUCTURE TEST
 1 SUBSTRUCTURE "*MODAL DYNAMIC" FOR TIME HISTORIES
 REQUIRES SUBSTRUCTURE GENERATION FILE indianpoint_1sub_gen1.inp
*NODE
*NSET,NSET=ANCHOR
*NSET,NSET=MIDSPN1
*NSET,NSET=MIDSPN2
*NSET,NSET=MIDSPN3
*NGEN
*NGEN,LINE=C
**
** SPRING DEFINITIONS
**
*NODE,NSET=SPRS
*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.,
*BOUNDARY
1,1,6
76,1,6
70,1
10,2
SPRS,1,3
MIDSPN1,3,3
MIDSPN2,1,1
MIDSPN3,2,2
*NSET,NSET=SUP1
*NSET,NSET=SMALL
*ELEMENT,TYPE=Z01,ELSET=ZUP1, FILE=indianpoint_1sub_gen1
*SUBSTRUCTURE PROPERTY, ELSET=ZUP1
*STEP
    FREQUENCY EXTRACTION
*FREQUENCY, eigensolver=lanczos, SIM=NO
24, ,
*NODE PRINT,NSET=SMALL
U,
*ELEMENT MATRIX OUTPUT,ELSET=ZUP1,STIFFNESS=YES,MASS=YES,FREQUENCY=1
*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=10
U,
*ELEMENT MATRIX OUTPUT,ELSET=ZUP1,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,
*EL PRINT,ELSET=SPRINGS,FREQUENCY=100
S,
*NODE FILE,NSET=SMALL,FREQUENCY=100
U,
V,
A,
*NODE PRINT,NSET=SMALL,FREQUENCY=100
U,
V,
A,
*OUTPUT,FIELD, FREQUENCY=999
*ELEMENT OUTPUT,ELSET=SPRINGS
S,
*NODE OUTPUT,NSET=SMALL
U,
V,
A,
*OUTPUT,HISTORY,FREQUENCY=100
*ELEMENT OUTPUT,ELSET=SPRINGS
S,
*NODE OUTPUT,NSET=SMALL
U,
V,
A,
*END STEP