*HEADING
: ACOUSTIC-STRUCTURAL INTERFACE, 1st-ORDER  [ASI4]
*NODE,NSET=BASE
*NODE,NSET=FSURF
*NFILL,NSET=FLUID
BASE,FSURF,10,1
*ELEMENT,TYPE=AC3D8
*ELGEN,ELSET=FLUID
*SOLID SECTION,ELSET=FLUID,MATERIAL=WATER
*ELEMENT,TYPE=ASI4,ELSET=INTER
*INTERFACE,ELSET=INTER
*MATERIAL,NAME=WATER
*ACOUSTIC MEDIUM,BULK MODULUS
*DENSITY
1000.,
*BOUNDARY
FSURF,8
*AMPLITUDE,DEFINITION=PERIODIC,NAME=SINE
1,10.,0.
0.,1.
*STEP,INC=200
*DYNAMIC,DIRECT
.02,1.
*BOUNDARY,AMP=SINE,TYPE=ACCELERATION
BASE,3,3,1.
*EL PRINT,FREQ=0
*NODE PRINT,FREQ=10
POR,A
*NODE FILE,FREQ=25
POR,A
*END STEP