*HEADING
 EIGENVALUE BUCKLING OF CYLINDER UNDER AXIAL LOAD
 (N=1,ALPHA=PI/4)
*NODE
*NGEN,LINE=C,NSET=LOADB
*NGEN,LINE=C,NSET=BND3
*NGEN,NSET=BND1
*NGEN,NSET=REST
*NGEN,NSET=BND2
*NSET,NSET=ALL
 BND1,BND2,BND3,REST
*NSET,NSET=LDB1
*NSET,NSET=LDB2,GENERATE
*ELEMENT,TYPE=S4R5
*ELGEN,ELSET=EALL
*SHELL SECTION,ELSET=EALL,MATERIAL=MAT
 .25,
*TRANSFORM,TYPE=C,NSET=ALL
*MATERIAL,NAME=MAT
*ELASTIC
 30.E6,.3
*RESTART,WRITE
**
*STEP
*BUCKLE
1,,20, 80
*BOUNDARY
 BND1,YSYMM
 BND2,YSYMM
 BND3,ZSYMM
 LOADB,1,2
 LOADB,4
 LOADB,6
*CLOAD
 LDB1,3,1500.
 LDB2,3,3000.
*NODE PRINT, GLOBAL=YES
U,
*NODE FILE, LAST MODE=1, GLOBAL=YES
U,
*END STEP