*HEADING
EXPLICIT:GLOBAL MODEL
ACOUSTIC TO STRUCTURE SUBMODELING [C3D8R/S4R]
ACOUSTIC PRESSURE APPLIED ON BOTH SIDES OF THE SHELL.
*PARAMETER
F=15
T1=1.0/F
T01=0.1*T1
OMEGA=2*3.14159*F
*NODE, NSET=BACK_F1
*NODE, NSET=FRONT_F1
*NODE, NSET = CENTER_F1
*NODE, NSET=FRONT_F2
*NODE, NSET=BACK_F2
***********************
*NODE,NSET=NSOLID
***
***
***
******
****
*NSET,NSET=FIX
*ELEMENT,TYPE=S4R,ELSET=ESOLID
*ELGEN,ELSET=ESOLID
*SURFACE, TYPE=ELEMENT, NAME=SHELL1
16,SNEG
17,SNEG
*SURFACE, TYPE=ELEMENT, NAME=SHELL2
16,SPOS
17,SPOS
*NSET, NSET=QA_TEST
NSOLID,
*NSET,NSET=NFLUID
BACK_F1,FRONT_F1,CENTER_F1,
BACK_F2,FRONT_F2
*ELEMENT, TYPE=AC3D8R, ELSET=EFLUID1
*ELEMENT, TYPE=AC3D8R, ELSET=EFLUID2
*ELSET,ELSET=EFLUID
EFLUID1,EFLUID2
*SHELL SECTION, ELSET=ESOLID, MATERIAL=ELAS
0.2
*MATERIAL, NAME=ELAS
*ELASTIC
207E9,0.3
*DENSITY
7800.0
*****
*SOLID SECTION, ELSET=EFLUID, MATERIAL=FLUID
*MATERIAL, NAME=FLUID
*ACOUSTIC MEDIUM
*DENSITY
1000.0
**
*SURFACE,NAME=FLUID1
3,S2
4,S2
*SURFACE,NAME=FLUID2
5,S1
6,S1
*TIE,NAME=COUPLED1
FLUID1,SHELL1
*TIE,NAME=COUPLED2
FLUID2,SHELL2
**
*BOUNDARY
FIX,1,6
**
*AMPLITUDE,NAME=SINE,DEF=PERIODIC
1,<OMEGA>,0.0,0.0
0,1,0,0
**
** STEP 1
**
*STEP
*DYNAMIC, EXPLICIT
,<T01>
*BOUNDARY, AMP=SINE
BACK_F1,8,,1E10
BACK_F2,8,,1E10
***********************************
*FILE OUTPUT,NUMBER INTERVAL=40
*NODE FILE, NSET=NFLUID
POR,
*NODE FILE, NSET=NSOLID
U,
***********
*OUTPUT,FIELD,NUMBER INTERVAL=10
*NODE OUTPUT,NSET=NFLUID
POR,
*NODE OUTPUT, NSET=NSOLID
U,
**********
*OUTPUT, HISTORY,FREQ=1
*NODE OUTPUT,NSET=NFLUID
POR,
*NODE OUTPUT,NSET=NSOLID
U1,
*****************QA_TEST***********
*OUTPUT, FIELD, NUMBER INTERVAL = 1
*NODE OUTPUT,NSET=QA_TEST
U,
*END STEP