*HEADING
ECA6SLE2: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED PATCH OF ELEMENTS  [CAX6MH]
**PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE,NSET=ALL
10,1.0,0
20,1.24,0.
30,1.24,.12
40,1.,.12
50,1.12,0.
60,1.24,.06
70,1.12,.12
80,1.0,.06
102,1.04,.02
104,1.18,.03
204,1.16,.08
202,1.08,.08
*NGEN,NSET=ALL
10,102,46
10,104,47
20,104,42
20,204,92
30,202,86
30,204,87
40,102,31
40,202,81
102,104
102,202,50
104,204,50
104,204,50
102,204,51
202,204
*ELEMENT,TYPE=CAX6MH,ELSET=ONE
1,10,104,102,57,103,56
2,10,20,104,50,62,57
3,10,102,40,56,71,80
4,102,104,204,103,154,153
5,104,20,204,62,112,154
6,20,30,204,60,117,112
7,102,202,40,152,121,71
8,102,204,202,153,203,152
9,202,30,40,116,70,121
10,202,204,30,203,117,116
*NSET,NSET=SIDES,GENERATE
10,80,10
*SOLID SECTION,MATERIAL=A1,ELSET=ONE
**.001
*MATERIAL,NAME=A1
*ELASTIC,TYPE=ISOTROPIC
30.E6,.3
*DENSITY
7.5E-4, 
*STEP
*FREQUENCY, eigensolver=lanczos, SIM=NO
5, , ,-1.E7 
*MODAL FILE
*CONTROLS,PARAMETERS=FIELD
1.E-14, 1., 10000. , , 1.E-12
*END STEP
*STEP,NLGEOM
*STATIC
*DLOAD
2, P1, -10000.
3, P3, -10000.
6, P1, -10000.
9, P2, -10000.
*BOUNDARY
10,1,2
20,2
*EL PRINT,FREQ=1
*NODE PRINT
U,RF
*END STEP
*STEP,NLGEOM
*FREQUENCY, eigensolver=lanczos, SIM=NO
5, , , -1.E+7 
*MODAL FILE
*EL PRINT,FREQ=1
*NODE PRINT,FREQ=0
*BOUNDARY,OP=NEW
*END STEP