*HEADING
STANDARD:SUBMODEL from ac2solid_g_c3d8_ac3d8_std
ACOUSTIC TO STRUCTURE SUBMODELING [C3D8/AC3D8]
ACOUSTIC PRESSURE DRIVES ON ONE SIDE OF THE SOLID;
DISPLACEMENT DRIVES THE OTHER SIDE OF THE SOLID;
*PARAMETER
f=15
T1=1.0/f
T01=0.1*T1
*PREPRINT,model=yes, history=yes
*NODE, NSET=FRONT_S
 1, 2.0, 0.0, 1.0
 2, 2.0, 0.0, 0.5
 3, 2.0, 0.0, 0.0
 6, 2.0, 1.0, 0.0
 5, 2.0, 1.0, 0.5
 4, 2.0, 1.0, 1.0
*NODE, NSET = CENTER_S
 7, 1.50, 0.0, 1.0
 8, 1.50, 0.0, 0.5
 9, 1.50, 0.0, 0.0
 12, 1.50, 1.0, 0.0
 11, 1.50, 1.0, 0.5
 10, 1.50, 1.0, 1.0
*NODE, NSET = Back_S
 13, 1.0, 0.0, 1.0
 14, 1.0, 0.0, 0.5
 15, 1.0, 0.0, 0.0
 18, 1.0, 1.0, 0.0
 17, 1.0, 1.0, 0.5
 16, 1.0, 1.0, 1.0
*NSET,NSET=QA_TEST
CENTER_S,
*ELEMENT, TYPE=C3D8, ELSET=SOLID
1,1,2,8,7, 4,5,11,10
2,2,3,9,8,5,6,12,11
3,7,8,14,13,10,11,17,16
4,8,9,15,14,11,12,18,17
*SOLID SECTION, ELSET=SOLID, MATERIAL=ELAS
*MATERIAL, NAME=ELAS
*ELASTIC
207E9,0.3
*DENSITY
7800,
**
*SURFACE,NAME=SOLID
1,S3
2,s3
*submodel, acoustic to structure,EXTERIOR=0.1
SOLID,
*SUBMODEL,EXTERIOR=0.1
BACK_S,
**
*STEP, NLGEOM=YES
*DYNAMIC,DIRECT
0.0001,<T01>
*BOUNDARY, SUBMODEL, step=1
FRONT_S,8,8
BACK_S,1,2
*****
*OUTPUT,FIELD,FREQ=10
*NODE OUTPUT
U,
*ELEMENT OUTPUT
S,
*OUTPUT,HISTORY,FREQ=1
*NODE OUTPUT,NSET=FRONT_S
U1,
*****************QA_TEST***********
*OUTPUT, FIELD, FREQ = 99999
*NODE OUTPUT,NSET=QA_TEST
U,
*END STEP