*HEADING
: NAFEMS TEST FV12, [S4R5]
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=S4R5
1,101,102,202,201
*ELGEN,ELSET=ELALL
1,8,1,1,8,100,8
*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
11, , ,-1E-1 
*OUTPUT,FIELD,VAR=PRESELECT,MODELIST
4,5,6,9,10
*ENDSTEP