*HEADING
PATCH TEST FOR ACOUSTIC ELEMENTS IN ABAQUS/EXPLICIT [ACAX4R]
**
** P=C0+C1*R+C2*Z; C0=-2E5; C1=200; C2=100;
** THE ACOUSTIC PRESSURES AT THE INTERIOR NODES ARE:
** P_102=10;P_104=39;P_202=24;P_204=40; 
** SEE CH. 1.5.9 OF ABAQUS/VERIFICATION MANUAL
**
*PREPRINT,ECHO=YES,HISTORY=YES,MODEL=YES
*NODE, NSET=NALL
10,1000.,0.
20,1000.24,0.
30,1000.24,.12
40,1000.,.12
102,1000.04,.02
104,1000.18,.03
204,1000.16,.08
202,1000.08,.08
*NSET,NSET=QA_TEST
102,104,202,204
*NSET,NSET=NOUT
QA_TEST
*ELEMENT,TYPE=ACAX4R, ELSET=EALL
1,10,20,104,102
2,10,102,202,40
3,102,104,204,202
4,104,20,30,204
5,202,204,30,40
*SOLID SECTION,MATERIAL=A1, ELSET=EALL
*MATERIAL,NAME=A1
*ACOUSTIC MEDIUM,BULK MODULUS
2.0E+09, 
*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
,.03
*BOUNDARY,AMP=RAMP
10,8, ,  0.0
20,8, , 48.0
30,8, , 60.0
40,8, , 12.0
*******************
*OUTPUT,FIELD, NUM=1
*NODE OUTPUT, NSET=QA_TEST
POR
*NODE OUTPUT
POR
*******************
*OUTPUT,HISTORY, TIME INTERVAL=0.0015
*NODE OUTPUT, NSET=NOUT
POR
*******************
*ENDSTEP