*HEADING
ELEMENT TESTED      : B31
SECONDARY SURFACE TYPE  : NODE
MAIN SURFACE TYPE : NODE
*PREPRINT, ECHO=YES, MODEL=YES, HISTORY=YES
*NODE,NSET=NALL
1, 35.355339, 0, 35.355339
2, 0,        50, 0
*ELEMENT,TYPE=B31, ELSET=EALL
1,1,2
*NSET, NSET=NSECONDARY
 1,
*NSET, NSET=NMAIN
 2,
*SURFACE, NAME=SMAIN, TYPE=NODE
NMAIN,
*SURFACE, NAME=SSECONDARY, TYPE=NODE
NSECONDARY,
*BEAM SECTION,SECTION=PIPE,MATERIAL=MAT, ELSET=EALL
10.,1.
*MATERIAL,NAME=MAT
*ELASTIC
10E8,0.3
*DENSITY
100
*TIE, CYCLICSYM, POSITION=0.5, NAME=TIE1
 SSECONDARY, SMAIN
*CYCLIC SYMMETRY MODEL,N=4
 0,0,0, -35.355339,0,35.355339
*STEP
*FREQUENCY,EIGENSOLVER=LANCZOS, SIM=NO
14,,,-1,2,3
*OUTPUT,FIELD, FREQUENCY=0
*END STEP