*HEADING
ELEMENT TESTED      : CSS8
SECONDARY SURFACE TYPE  : NODE
MAIN SURFACE TYPE : NODE
*PREPRINT, ECHO=YES, MODEL=YES, HISTORY=YES
*NODE
      1,          30.,           0., -0.5
      2,           0.,          30., -0.5
      3,           0.,          10., -0.5
      4,          10.,           0., -0.5
      5,          50.,           0., -0.5
      6,           0.,          50., -0.5
     11,          30.,           0., +0.5
     12,           0.,          30., +0.5
     13,           0.,          10., +0.5
     14,          10.,           0., +0.5
     15,          50.,           0., +0.5
     16,           0.,          50., +0.5
*ELEMENT, TYPE=CSS8, ELSET=EALL
 1, 1, 2, 3, 4, 11, 12, 13, 14
 2, 2, 1, 5, 6, 12, 11, 15, 16
*NSET, NSET=NBC
 3, 4
 13, 14
*NSET, NSET=NSECONDARY
 1, 4, 5
 11, 14, 15
*NSET, NSET=NMAIN
 2, 3, 6
 12, 13, 16
*SURFACE, NAME=SSECONDARY, TYPE=NODE
 NSECONDARY,
*SURFACE, NAME=SMAIN, TYPE=NODE
 NMAIN,
*Solid SECTION, ELSET=EALL,MATERIAL=MAT
*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, 0,0,1
*STEP
*FREQUENCY, EIGENSOLVER=LANCZOS
 12,
*OUTPUT, FIELD, FREQUENCY=0
*END STEP