*HEADING
: ARBITRARY GENERAL SECTION (I)  [B31OS]
*NODE
*NGEN,NSET=ALL
*ELEMENT,TYPE=B31OS, ELSET=EALL
*ELSET, ELSET=FOUR
*BEAM GENERAL SECTION,SECTION=ARBITRARY, ELSET=EALL
7, -1.5, -.9428572, 1.5, -.9428572, .2
0., -.9428572, 0.
0., -.8428572, 0.
0., 1.1571428, .2
0., 1.2571428, .0
1.0, 1.2571428, 0.
-1.0, 1.2571428, .2
0., 0., -1.
*BOUNDARY
1, 1, 7
*STEP,PERTURBATION
*STATIC
*CLOAD
11,2,25.
*EL PRINT
SF,
*NODE PRINT
 U1,U2,U3,COORD
 UR1,UR2,UR3,WARP,COORD
*END STEP
*STEP,PERTURBATION
*STATIC
*CLOAD
11,4,25.
*END STEP