*HEADING
: ACOUSTIC-STRUCTURAL INTERFACE, 1st-ORDER  [ASI1]
*NODE,NSET=BASE
*NODE,NSET=FSURF
*NGEN,NSET=FLUID
*ELEMENT,TYPE=AC1D2
*ELGEN,ELSET=FLUID
*SOLID SECTION,ELSET=FLUID,MATERIAL=WATER
400.,
*ELEMENT,TYPE=ASI1,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
.02,1.
*BOUNDARY,TYPE=ACCELERATION,AMPLITUDE=SINE
BASE,2,2,1.
*EL PRINT,FREQ=0
*NODE PRINT,FREQ=10
POR,A,
*OUTPUT, FIELD, FREQ=25
*NODE OUTPUT
POR,A,
*END STEP