*HEADING
EC3ISHE1: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED 1-ELEMENT MESH  [C3D15VH]
*PREPRINT,ECHO=YES,HISTORY=YES,MODEL=YES
*NODE
  1, 0.0, 0.0, 0.0
  2, 2.0, 0.0, 0.0
  3, 2.0, 2.0, 0.0
  4, 0.0, 2.0, 0.0
  5, 0.0, 0.0, 1.0
  6, 2.0, 0.0, 1.0
  7, 2.0, 2.0, 1.0
  8, 0.0, 2.0, 1.0
  9, 1.0, 0.0, 0.0
 10, 2.0, 1.0, 0.0
 11, 1.0, 2.0, 0.0
 12, 0.0, 1.0, 0.0
 13, 1.0, 0.0, 1.0
 14, 2.0, 1.0, 1.0
 15, 1.0, 2.0, 1.0
 16, 0.0, 1.0, 1.0
 17, 0.0, 0.0, 0.5
 18, 2.0, 0.0, 0.5
 19, 2.0, 2.0, 0.5
 20, 0.0, 2.0, 0.5
 21, 1.0, 1.0, 0.0
 22, 1.0, 1.0, 1.0
 23, 1.0, 0.0, 0.5
 24, 2.0, 1.0, 0.5
 25, 1.0, 2.0, 0.5
 26, 0.0, 1.0, 0.5
 27, 1.0, 1.0, 0.5
*ELEMENT,TYPE=C3D15VH, ELSET=EALL
 1, 1,2,4,5,6,8,9,21,12,13,22,16,17,18,20,
  23,27,26
*SOLID SECTION,MATERIAL=A1, ELSET=EALL
*MATERIAL,NAME=A1
*ELASTIC
 3.E6,0.3
*DENSITY
7.5E-4, 
*STEP
*FREQUENCY, eigensolver=lanczos, SIM=NO
9, , ,-1.E7
*OUTPUT,FIELD
*MODAL OUTPUT
*END STEP