*HEADING
 EIGENVALUE BUCKLING OF CYLINDER UNDER AXIAL LOAD (N=8,ALPHA=PI/16)  
*PREPRINT,MODEL=NO,HISTORY=NO
*NODE
 10,  100.,0.,0.
 14,  98.078528,0.,19.50903
 410, 100.,400.,0.
 414, 98.078528,400.,19.50903
*NGEN,LINE=C,NSET=LOADB
 10,14,1, ,0.,0.,0.
*NGEN,LINE=C,NSET=BND3
 410,414,1, ,0.,400.,0.
*NGEN,NSET=BND1
 10,410,10
*NGEN,NSET=REST
 11,411,10
 12,412,10
 13,413,10
*NGEN,NSET=BND2
 14,414,10
*NSET,NSET=ALL
 BND1,BND2,BND3,REST
*NSET,NSET=LDB1
 10,14
*NSET,NSET=LDB2
 11,12,13
*****
*ELEMENT,TYPE=S4R
 1, 10,20,21,11
*ELGEN,ELSET=EALL
 1, 4,1,2, 40,10,8
*ELSET,ELSET=EPRINT
 1,2,3,4
*SHELL SECTION,ELSET=EALL,MATERIAL=MAT
 .25, 
*TRANSFORM,TYPE=C,NSET=ALL
 0.,0.,0., 0.,1.,0.
*MATERIAL,NAME=MAT
*ELASTIC
 30.E6,.3
*STEP
*BUCKLE
4, , 10,  80
*EL PRINT,ELSET=EPRINT
 S,E,
*CLOAD
 LDB1,3,1500.
 LDB2,3,3000.
*BOUNDARY,LOAD CASE=2, OP=NEW
 BND1,YSYMM
 BND2,YASYMM
 BND3,ZASYMM
 LOADB,1,2
 LOADB,4
 LOADB,6
*BOUNDARY,LOAD CASE=1
 BND1,YSYMM
 BND2,YSYMM
 BND3,ZSYMM
 LOADB,1,2
 LOADB,4
 LOADB,6
*MODAL FILE
*END STEP