*HEADING
IMPEDANCE PROPERTY  [ACAX6]
*NODE, Nset=QA_NSET
1, 
41,,10.
1001,.5641896
1041,.5641896,10.
3001,0.2820948,0.
3041,0.2820948,10.
*NGEN,NSET=NALL
1,41
1001,1041
3001,3041
*ELEMENT,TYPE=ACAX6,ELSET=EALL
1,1,1001,1005,3001,1003,3003
2,1,1005,5,3003,3005,3
*ELGEN,ELSET=EALL
1,10,4,2
2,10,4,2
*ELSET,ELSET=LINER3
20, 
*MATERIAL,NAME=AIR
*DENSITY
1.293, 
*ACOUSTIC MEDIUM,BULK MODULUS
1.42176E5, 
*SOLID SECTION,MATERIAL=AIR,ELSET=EALL
*NSET,NSET=QA_TEST,GEN
29,41,2
1029,1041,2
3029,3041,2
*NSET,NSET=DRIV
1,1001
*****************************************
*STEP
*STEADY STATE DYNAMIC,DIRECT
10., 
25., 
50., 
*IMPEDANCE
LINER3,I2
*BOUNDARY
DRIV,8,,1.
3001,8,,1.
*NODE PRINT,NSET=QA_TEST
POR,
*NODE FILE,NSET=QA_TEST
POR
*OUTPUT,FIELD, OP=NEW
*NODE OUTPUT,NSET=QA_TEST
POR,
*OUTPUT,HISTORY,OP=ADD
*NODE OUTPUT,NSET=QA_TEST
POR,
*END STEP