*HEADING
EB33PXE1: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED 1-ELEMENT MESH  [B32]
AN EXTRA NODE IS USED TO DEFINE THE BEAM SECTION ORIENTATION
*NODE,NSET=NALL
1,0.
 3,.5,1.,1.5
2,1.,2.,3,
4,1.,2.,2,
*ELEMENT,TYPE=B32, ELSET=EALL
 1,1,3,2,4
*BEAM SECTION,SECTION=PIPE,MATERIAL=A1, ELSET=EALL
10.,1.
1,1,1
*MATERIAL,NAME=A1
*ELASTIC
30.E6,0.3
*DENSITY
7.5E-4, 
*STEP
*FREQUENCY, eigensolver=lanczos
9, , ,-1.0E4
*END STEP