*HEADING
 SKEW-SENSITIVITY ANALYSIS, 0 DEG, C3D10M,
**
*NODE
*NODE,NSET=MID
*NODE
**
**
*ELEMENT, TYPE=C3D10M, ELSET=EALL
*SOLID SECTION,MATERIAL=A1,ELSET=EALL,controls=ctr
*HOURGLASS STIFFNESS
*section controls,name=ctr,hourglass=stiffness
*MATERIAL,NAME=A1
*ELASTIC
1.E8,0.
**
** step  1,Default
**
*STEP, PERTURBATION
*STATIC
**
** fix
**
*BOUNDARY
       1, 1,,          0.
       1, 2,,          0.
       1, 3,,          0.
      18, 1,,          0.
      18, 2,,          0.
      18, 3,,          0.
      35, 1,,          0.
      35, 2,,          0.
     MID, 3,,          0.
**
** load
**
*CLOAD, OP=NEW
      17, 2,       -0.25
      51, 2,       -0.25
     111, 2,       -0.25
     145, 2,       -0.25
**
*NODE FILE
U,
*OUTPUT,FIELD
*NODE OUTPUT
U,
*EL PRINT
S,
E,
*END STEP