*HEADING
: ACOUSTIC-STRUCTURAL INTERFACE, 1st-ORDER  [ASI1]
*NODE,NSET=BASE
1, 
*NODE,NSET=FSURF
11,0.,100.
*NGEN,NSET=FLUID
1,11
*ELEMENT,TYPE=AC1D2
1,1,3
*ELGEN,ELSET=FLUID
1,5,2,1
*SOLID SECTION,ELSET=FLUID,MATERIAL=WATER
400., 
*ELEMENT,TYPE=ASI1,ELSET=INTER
6,1
*INTERFACE,ELSET=INTER
400.,0.,1.
*MATERIAL,NAME=WATER
*ACOUSTIC MEDIUM,BULK MODULUS
2.0E9, 
*DENSITY
1000., 
*BOUNDARY
FSURF,8
*AMPLITUDE,DEFINITION=PERIODIC,NAME=SINE
1,10.,0.
0.,1.
*STEP,INC=200
*DYNAMIC,DIRECT
.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