*HEADING
 TEST OF *IMPERFECTION, SUPERPOSITION OF MODE SHAPES (INIT GEOM)
*NODE
*NGEN, LINE=C, NSET=BASE
*NGEN, LINE=C, NSET=TOP
*NFILL,NSET=NALL
 BASE,TOP,6,100
*NSET,NSET=EDGE1,GENERATE
*NSET,NSET=EDGE2,GENERATE
*ELEMENT, TYPE=S4R5
*ELGEN, ELSET=EALL
*SHELL SECTION,ELSET=EALL,MATERIAL=MAT
 .25,
*TRANSFORM,TYPE=C,NSET=NALL
*MATERIAL,NAME=MAT
*ELASTIC
 30.E6,.3
*DENSITY
 1.0,
*RESTART,WRITE
*BOUNDARY
 EDGE1,YSYMM
 EDGE2,YSYMM
 TOP, ENCASTRE
 BASE,ENCASTRE
*STEP
*FREQUENCY, eigensolver=lanczos
 4, ,
*FILE FORMAT,ASCII
*NODE PRINT, NSET=NALL, GLOBAL=YES
 U,
*EL PRINT, FREQ=0
 S,
*NODE FILE, NSET=NALL
 U,
*NODE FILE, NSET=TOP
 U,
*NODE FILE, NSET=BASE
 U,
*END STEP