*HEADING
CASE A, C3D20R, CENTRIF                
*NODE
1,      0.   , 0.150, -1.5E-3
3,      0.014, 0.150, -1.5E-3
121,    0.   , 0.478, -1.5E-3
123,    0.014, 0.478, -1.5E-3
**
1001,   0.   , 0.150,
1003,   0.014, 0.150,
1121,   0.   , 0.478,
1123,   0.014, 0.478,
**
2001,   0.   , 0.150, 1.5E-3
2003,   0.014, 0.150, 1.5E-3
2121,   0.   , 0.478, 1.5E-3
2123,   0.014, 0.478, 1.5E-3
*NGEN,NSET=FIXED
   1,   3
1001,1003
2001,2003
*NGEN,NSET=AUSSEN
 121, 123
1121,1123
2121,2123
*NGEN
   1, 121, 10
   2, 122, 10
   3, 123, 10
1001,1121, 10
1002,1122, 10
1003,1123, 10
2001,2121, 10
2002,2122, 10
2003,2123, 10
*ELEMENT,TYPE=C3D20R
1,    1,3,23,21,  2001,2003,2023,2021, 2,13,22,11, 2002,2013,2022,
 2011, 1001,1003,1023,1021
*ELGEN,ELSET=BRICK
1, 6, 20, 20
*SOLID SECTION,MATERIAL=MAT,ELSET=BRICK
*MATERIAL,NAME=MAT
*ELASTIC
2.17E11,0.3
*DENSITY
7850., 
*NSET,NSET=SETXSYMM,GENERATE
1,121,10
1001,1121,20
2001,2121,10
*BOUNDARY
FIXED,1,3
SETXSYMM,XSYMM
*STEP
FREQUENCY FOR OMEGA = 0 RAD/SEC
*FREQUENCY, eigensolver=lanczos
1, , 
*EL PRINT,FREQUENCY=0
*MODAL FILE
*END STEP
**
*************************************  STEP 2: SPIN UP TO 25 REVS/SEC
**
*STEP,NLGEOM
OMEGA = 157.08 RADS/SEC
*STATIC
*DLOAD
BRICK,CENTRIF,24674.1146497,0.,0.,0.,0.,0.,1.
*EL PRINT,FREQUENCY=0
*NODE FILE,NSET=AUSSEN
U,
*OUTPUT,FIELD
*NODE OUTPUT,NSET=AUSSEN
U,
*END STEP
**
*************************************  STEP 3: FREQUENCY AT 25  REVS/SEC
**
*STEP,NLGEOM
EIGENFREQUENCY AT OMEGA = 157.08 RAD/SEC
*FREQUENCY, eigensolver=lanczos
1, , 
*EL PRINT,FREQUENCY=0
*MODAL FILE
*END STEP
**
*************************************  STEP 4: SPIN UP TO 50 REVS/SEC
**
*STEP,NLGEOM
OMEGA = 314.26 RADS/SEC
*STATIC
*DLOAD
BRICK,CENTRIF,98696.4968153,0.,0.,0.,0.,0.,1.
*EL PRINT,FREQUENCY=0
*END STEP
**
*************************************  STEP 5: FREQUENCY AT 50 REVS/SEC
**
*STEP,NLGEOM
EIGENFREQUENCY AT OMEGA = 314.16 RAD/SEC
*FREQUENCY, eigensolver=lanczos
1, , 
*EL PRINT,FREQUENCY=0
*MODAL FILE
*END STEP
**
*************************************  STEP 6: SPIN UP TO 75 REVS/SEC
**
*STEP,NLGEOM
OMEGA = 471.24 RAD/SEC
*STATIC
*DLOAD
BRICK,CENTRIF,222067.133758,0.,0.,0.,0.,0.,1.
*EL PRINT,FREQUENCY=0
*END STEP
**
*************************************  STEP 7: FREQUENCY AT 75 REVS/SEC
**
*STEP,NLGEOM
EIGENFREQUENCY AT OMEGA = 471.24 RADS/SEC
*FREQUENCY, eigensolver=lanczos
1, , 
*EL PRINT,FREQUENCY=0
*MODAL FILE
*END STEP