*HEADING
 SKEW-SENSITIVITY ANALYSIS, 30 DEG TRAPEZOIDAL, CSS8, 1 X 8 MESH  
*NODE,NSET=SIDE1
1,0.,0.
3,.692265,0.
5,1.557735,0.
13,4.557735,0.
15,5.192265,0.
17,6.,0.
401,0.,.2
403,.807735,.2
405,1.442265,.2
413,4.442265,.2
415,5.307735,.2
417,6.,.2
*NGEN,NSET=SIDE1
3,15,4
5,13,4
403,415,4
405,413,4
*NCOPY, OLD SET=SIDE1, CHANGE NUMBER=1000, SHIFT
0.,0.,.01

*NSET,NSET=FIX
1,401,1001,1401
*NSET,NSET=N1,GENERATE
1,    17, 2
401, 417, 2
*ELEMENT,TYPE=CSS8
1, 1001,1003,3,1, 1401,1403,403,401
*ELGEN,ELSET=EALL
1,8,2,1
*MATERIAL,NAME=A1
*ELASTIC
1.E8,0.
*SOLID SECTION,MATERIAL=A1,ELSET=EALL
*STEP,PERTURBATION
*STATIC
*BOUNDARY
FIX,1,3
N1, 3,3
*CLOAD
17,2,-.25
417,2,-.25
1017,2,-.25
1417,2,-.25
*EL PRINT
COORD, 
S, 
E, 
*NODE FILE
U, 
*OUTPUT,FIELD
*NODE OUTPUT
U,
*END STEP