*HEADING
EC34AFE1: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED 1-ELEMENT MESH  [AC3D4]
*NODE, Nset=ODB_NSET
   1,0,0,0
  21,5.65e-2,0,0
  23,5.65e-2,5.6e-2,0
2001,2.825e-2,0,0
2021,5.65e-2,2.8e-2,0
2023,2.825e-2,2.8e-2,0
3001,2.825e-2,0,2.825e-2
3021,5.65e-2,0,2.825e-2
3031,5.65e-2,2.8e-2,2.825e-2
3023,2.825e-2,2.8e-2,2.825e-2
4021,5.65e-2,0,5.65e-2
*ELEMENT,TYPE=AC3D4,ELSET=ALL
 1,  1, 21, 23,4021
*SOLID SECTION,MATERIAL=ALL,ELSET=ALL
*MATERIAL,NAME=ALL
*DENSITY
 1.,
*ACOUSTIC MEDIUM,BULK MODULUS
1.183E5, 
**
** Sets added by addodb
**
*Elset,Elset=ODB_ESET
ALL,
**
**
*Nset, Nset=ODB_NSET
ODB_NSET, 
**
**
*STEP
*FREQUENCY,EIGENSOLVER=AMS
14,,6000.,10.0,4.0,3.0
*OUTPUT,FIELD,FREQUENCY=0
*NODE PRINT,F=0
*EL PRINT,F=0
*OUTPUT,HISTORY,OP=ADD
*MODAL OUTPUT,VARIABLE=ALL
*ENDSTEP