*HEADING
 SKEW-SENSITIVITY ANALYSIS, 0 DEG, S4R, 1 X 8 MESH                 
*NODE
1,0.,0.
17,6.,0.
401,0.,.2
417,6.,.2
*NGEN,NSET=FIX
1,401,100
*NGEN,NSET=END
17,417,100
*NFILL
FIX,END,8,2
*NSET,NSET=FIX,GENERATE
1,401,100
*ELEMENT,TYPE=S4R
1,1,3,403,401
*ELGEN,ELSET=EALL
1,8,2,1
*MATERIAL,NAME=A1
*ELASTIC
1.E8,0.
*SHELL SECTION,MATERIAL=A1,ELSET=EALL,CONTROLS=HGC
.01, 
*HOURGLASS STIFFNESS
,,,1.e-10
*SECTION CONTROLS,NAME=HGC,HOURGLASS=ENHANCED
*STEP,PERTURBATION
*STATIC
*BOUNDARY
FIX,1,6
*CLOAD
17,2,-.5
417,2,-.5
*EL PRINT
COORD, 
S, 
E, 
*NODE PRINT
U, 
RF,
*OUTPUT,FIELD
*NODE OUTPUT
U,
RF,
*ELEMENT OUTPUT
S,
E,
*NSET,NSET=NOUT
17
*ELSET,ELSET=EOUT
1
*OUTPUT,HISTORY
*NODE OUTPUT,NSET=FIX
RF,
*NODE OUTPUT,NSET=NOUT
U,
*ELEMENT OUTPUT,ELSET=EOUT
S,
E,
*ENERGY OUTPUT,VARIABLE=PRESELECT
*END STEP