*Heading
STANDARD-TO-EXPLICIT IMPORT
*IMPORT, STATE=YES, UPDATE=NO
SOLID, FLUID, INF
*PARAMETER
f=15
omega=2*3.14159*f
*AMPLITUDE,NAME=SINE,DEF=PERIODIC
1,<omega>,-0.005,0.0
0,1,0,0
*SURFACE,NAME=SOLID
2,S2
*SURFACE,NAME=FLUID
3,S4
*TIE,NAME=COUPLE
SOLID,FLUID
*NSET, NSET=BACK_S
1,7
*BOUNDARY
BACK_S,1,2
*STEP,NLGEOM
*DYNAMIC, HAFTOL=5e05
0.00001,0.005,0.00001,0.005
*BOUNDARY,AMP=SINE
 5,8,,1e6
11,8,,1e6
*END STEP