The following is the code. Could you please help me in getting the convergence? TIA.
**
*HEADING
trqmax
**
**
*node, nset=set_solid
300103,-292,297,160
300203,-363,-103,150
300303,137,-20,175
**
**
*node, nset=set_grnd
200103,-292,297,160
200203,-363,-103,150
200303,137,-20,175
**
**
*node, nset=solid
100103,-159,21.9,183
*node,nset=dummy
1,0.,0.,0.
**
**
**
*Rigid body, Nset=set_solid, Ref node=100103, Rot node=1
**
**
**
**
*ELEMENT, TYPE = SPRING2, ELSET = kx
400103,300103,200103
400104,300203,200203
400105,300303,200303
*ELEMENT, TYPE = SPRING2, ELSET = ky
400203,300103,200103
400204,300203,200203
400205,300303,200303
*ELEMENT, TYPE = SPRING2, ELSET = kz
400303,300103,200103
400304,300203,200203
400305,300303,200303
*ELEMENT, TYPE = SPRING2, ELSET = krx
400403,300103,200103
400404,300203,200203
400405,300303,200303
*ELEMENT, TYPE = SPRING2, ELSET = kry
400503,300103,200103
400504,300203,200203
400505,300303,200303
*ELEMENT, TYPE = SPRING2, ELSET = krz
400603,300103,200103
400604,300203,200203
400605,300303,200303
*SPRING, ELSET = kx, NONLINEAR
1,1
-4005.04,-8.67
-3618.56,-8.16
-3283.32,-7.65
-2976.74,-7.14
-2690.86,-6.62
-2421.67,-6.11
-2164.37,-5.6
-1919.14,-5.09
-1683.23,-4.57
-1460.54,-4.06
-1254.91,-3.55
-1065.4,-3.04
-883.79,-2.53
-703.32,-2.01
-523.87,-1.5
-344.64,-0.99
-164.81,-0.48
0.0,0.0
187.76,0.55
363.29,1.06
538.52,1.57
714.7,2.09
892.03,2.6
1069.85,3.11
1253.58,3.62
1452.69,4.13
1671.14,4.65
1903.74,5.16
2147.71,5.67
2403.08,6.18
2671.04,6.7
2955.35,7.21
3264.19,7.72
3604.72,8.23
4002.99,8.75
*SPRING, ELSET = ky, NONLINEAR
2,2
-4005.46,-9.27
-3594.76,-8.76
-3241.7,-8.25
-2926.17,-7.74
-2640.5,-7.23
-2376,-6.71
-2131.9,-6.2
-1908.64,-5.69
-1704.79,-5.18
-1511.27,-4.67
-1325.84,-4.16
-1147.26,-3.64
-976.32,-3.13
-811.77,-2.62
-651.21,-2.11
-498.89,-1.6
-350.01,-1.09
-194.8,-0.57
0.0,0.0
162.7,0.45
358.53,0.96
560.3,1.47
765.15,1.99
976.28,2.5
1190.39,3.01
1410.83,3.52
1636.98,4.03
1872.06,4.54
2115.41,5.06
2373.21,5.57
2641.8,6.08
2931.63,6.59
3242.02,7.1
3588.46,7.61
4002.37,8.13
*SPRING, ELSET = kz, NONLINEAR
3,3
-2000.0,-20.0
-1000.0,-10.0
-800.85,-7.99
-747.25,-7.47
-695.05,-6.95
-644.48,-6.44
-593.54,-5.92
-543.29,-5.4
-493.3,-4.89
-441.7,-4.37
-391.15,-3.86
-339.83,-3.34
-288.38,-2.82
-236.52,-2.31
-184.22,-1.79
-131.76,-1.27
-77.93,-0.76
-25.2,-0.24
0.0,0.0
80.47,0.79
132.91,1.31
185.93,1.82
238.02,2.34
289.62,2.86
341.35,3.37
392.43,3.89
442.69,4.4
493.19,4.92
543.11,5.44
592.78,5.95
642.78,6.47
692.2,6.99
743.18,7.5
800.9,8.02
1000.0,10.0
2000.0,20.0
**
*SPRING, ELSET = krx
4,4
2.0e6
*SPRING, ELSET = kry
5,5
2.0e6
*SPRING, ELSET = krz
6,6
2.0e6
**
**
*Boundary
200103,1,6
200203,1,6
200303,1,6
**
**
**
**
*Step,NLGEOM,inc=5000
*Static
0.1,1, 1e-08, 1
**0.01,1,1e-05,0.1
**
**
**
*Cload
100103,1,35000
**
**
*Output
*Node Print, nset = solid
U
*Node Print, nset = set_Solid
U
*Node Print, nset = set_Solid
RF
*Node Print, nset = set_grnd
RF
*END STEP