*HEADING
PATCH TEST FOR ACOUSTIC ELEMENTS IN ABAQUS/EXPLICIT [AC3D4]
**
** P=C0+C1*X+C2*Y+C3*Z; C0=0.0; C1=200; C2=100;C3=200
** THE ACOUSTIC PRESSURES AT THE INTERIOR NODES ARE:
** P_100=211.2;P_300=287.5; P_400=122.4;
** P_402=175.6; ETC.
** SEE CH. 1.5.9 OF ABAQUS/VERIFICATION MANUAL
**
*NODE, NSET=NALL
*NSET,NSET=QA_TEST
*NSET,NSET=NOUT
QA_TEST
*ELEMENT,TYPE=AC3D4, ELSET=EALL
*SOLID SECTION,MATERIAL=A1, ELSET=EALL
*MATERIAL,NAME=A1
*ACOUSTIC MEDIUM,BULK MODULUS
*DENSITY
1.0E+03,
**
*AMPLITUDE,NAME=RAMP,DEF=SMOOTH STEP
0.0,0.0,0.02,1.0,0.03,1.0
*RESTART,WRITE,NUM=10
*STEP
*DYNAMIC, EXPLICIT
,0.03
*BOUNDARY,AMP=RAMP
 10, 8,  ,200.
 20, 8,  ,400.
120, 8,  ,200.
110, 8,  , 0.0
 12, 8,  ,300.
 22, 8,  ,500.
320, 8,  ,300.
420, 8,  ,100.
*******************
*OUTPUT,FIELD, NUM=1
*NODE OUTPUT, NSET=QA_TEST
POR
*NODE OUTPUT
POR
*******************
*OUTPUT,HISTORY, TIME INTERVAL=0.0015
*NODE OUTPUT, NSET=NOUT
POR
*******************
*END STEP