*HEADING
 CANTILEVER WITH CLOSED GAP AT FREE END       
*NODE
 1, 0.,0.
 11,5.,0.
 17,5.,0.
*NGEN
 1,11
*ELEMENT,TYPE=B23
 1,1,2
*ELGEN,ELSET=EALL
 1,10
*BEAM SECTION,SECTION=CIRC,MATERIAL=A1,ELSET=EALL
 .1, 
*MATERIAL,NAME= A1
*ELASTIC
 27.E6, 
*DENSITY
 7.5E-4, 
*ELEMENT,TYPE=GAPUNI,ELSET=GAP1
13,11,17
*GAP,ELSET=GAP1
0.,0.,-1.,0.
*BOUNDARY
 1,1,2
 1,6
 17,1,2
*STEP
 GET VIBRATION FREQUENCIES AND MODE SHAPES
*FREQUENCY, eigensolver=subspace, SIM=NO
 5,10000.,
*EL PRINT,FREQUENCY=0
*MODAL FILE
*END STEP