*HEADING
EC12DFP7: PATCH TEST FOR ACCOUSTIC ELEMENTS [AC1D2]
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE, NSET=NALL
10,  0.0, 0.0
20,  1.0, 0.0
30,  1.5, 0.0
40,  3.0, 0.0
*NGEN, NSET=NALL
10,40, 3
*ELEMENT,TYPE=AC1D2, ELSET=EALL
1, 10,20
2, 20,30
3, 30,40
*SOLID SECTION,MATERIAL=A1, ELSET=EALL
*MATERIAL,NAME=A1
*ACOUSTIC MEDIUM,BULK MODULUS
2.0E+09, 
*DENSITY
1.0E+03, 
*RESTART,WRITE
**
** Sets added by addodb
**
*Elset,Elset=ODB_ESET
EALL,
**
**
*Nset, Nset=ODB_NSET
NALL, NALL
**
**
*STEP
 ACCOUSTIC PATCH TEST
*STEADY STATE DYNAMICS, DIRECT
.01,
*BOUNDARY
10,8, ,  0.0
40,8, , 12.0
*NODE PRINT, FREQ=2
 POR, 
*EL PRINT, FREQ=2
*OUTPUT,FIELD, OP=ADD,Frequency=2
*NODE OUTPUT
 POR, 
*OUTPUT,HISTORY,Frequency=2
*NODE OUTPUT, Nset=ODB_NSET
 POR, 
*ENDSTEP