*HEADING
EC35AFE4: EIGENVALUE ANALYSIS, ACOUSTIC ORGAN PIPE MODES  [AC3D5]
*NODE, Nset=ODB_NSET
*NGEN,NSET=NALL
*NCOPY,CHANGE NUMBER=1000,OLD SET=NALL,SHIFT, New Set=ODB_NSET
*ELEMENT,TYPE=AC3D5,ELSET=EALL
**1,1,101,102,2,1001,1101,1102,1002
*ELGEN,ELSET=EALL
*MATERIAL,NAME=AIR
*DENSITY
1.293,
*ACOUSTIC MEDIUM,BULK MODULUS
*SOLID SECTION,MATERIAL=AIR,ELSET=EALL
**
** Sets added by addodb
**
*Elset,Elset=ODB_ESET
EALL,
**
**
*Nset, Nset=ODB_NSET
ODB_NSET, NALL
**
**
*STEP
 OPEN/OPEN CONDITION
*FREQUENCY,EIGENSOLVER=AMS
14,,2000.,10.0,4.0,3.0
*OUTPUT,FIELD,FREQUENCY=0
*BOUNDARY
1,8
101,8
21,8
121,8
1001,8
1101,8
1021,8
1121,8
*NODE PRINT
POR,PPOR
*OUTPUT,HISTORY,freq=0
*MODAL OUTPUT,VARIABLE=ALL
*END STEP
*************************
*STEP
 OPEN/CLOSED CONDITION
*FREQUENCY,EIGENSOLVER=AMS
14,,2000.,10.0,4.0,3.0
*OUTPUT,FIELD,FREQUENCY=0
*BOUNDARY
1,8
101,8
1001,8
1101,8
*NODE PRINT
POR,PPOR
*OUTPUT,HISTORY,freq=0
*MODAL OUTPUT,VARIABLE=ALL
*END STEP