*HEADING
: NAFEMS TEST FV12, [S8R] ;
Shell Elements -- FREE THIN SQUARE PLATE                                                              
*NODE
101,0,0
109,10,0
901,0,10
909,10,10
*NGEN,NSET=BOT
101,109
*NGEN,NSET=TOP
901,909
*NFILL,NSET=NALL
BOT,TOP,8,100
*ELEMENT,TYPE=S8R
1,101,103,303,301,102,203,302,201
*ELGEN,ELSET=ELALL
1,4,2,1,4,200,4
*SHELL SECTION,MATERIAL=MAT1,ELSET=ELALL
.05, 
*MATERIAL,NAME=MAT1
*ELASTIC
2E11,0.3
*DENSITY
8000, 
*BOUNDARY
NALL,1,2
NALL,6
*STEP
*FREQUENCY, eigensolver=lanczos
10, , ,-1E-1 
*OUTPUT,FIELD,VAR=PRESELECT,MODELIST
5,6,9,10
*ENDSTEP