*HEADING
PATCH TEST FOR ACOUSTIC ELEMENTS IN ABAQUS/EXPLICIT [ACAX3]
**
** 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
10,1000.0,0
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=ACAX3, ELSET=EALL
  200,   10,   20,  104,
  201,  104,  102,   10,
  202,   10,  102,  202,
  203,  202,   40,   10,
  204,  102,  104,  204,
  205,  204,  202,  102,
  206,  104,   20,   30,
  207,   30,  204,  104,
  208,  202,  204,   30,
  209,   30,   40,  202,
*SOLID SECTION,ELSET=EALL,MATERIAL=A1
.12, 
*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
*******************
*END STEP