*** ERROR # 941 *** NON-CONVERGENT NONLINEAR ITERATIONS FOR SUBCASE 1
Hi,
I met the *** ERROR # 941 *** when I was doing a non-linear analysis. This is material non-linear. No contact or large deformation is defined.
This is the first time I met the problem.
*** ERROR # 941 ***
NON-CONVERGENT NONLINEAR ITERATIONS FOR SUBCASE 1
Suggestions:
(Scratch disk space usage for starting iteration = 621 MB)
(Running in-core solution)
Following is the .out file. Thanks for your help.
*** INFORMATION # 1579
for material id = 10 referenced from property id = 1.
MATS1 referred to from MID3 will be ignored - plasticity is
supported for membrane and bending deformation, but not for transverse shear.
*** INFORMATION # 1579
for material id = 10 referenced from property id = 2.
MATS1 referred to from MID3 will be ignored - plasticity is
supported for membrane and bending deformation, but not for transverse shear.
*** INFORMATION # 1579
for material id = 10 referenced from property id = 3.
MATS1 referred to from MID3 will be ignored - plasticity is
supported for membrane and bending deformation, but not for transverse shear.
*** INFORMATION # 1579
for material id = 10 referenced from property id = 10.
MATS1 referred to from MID3 will be ignored - plasticity is
supported for membrane and bending deformation, but not for transverse shear.
*** INFORMATION # 815
The total number of rigid elements, whose rotational dependent d.o.f.
are removed because there is no need to constrain those d.o.f., is 2.
*** INFORMATION # 3433
MUMPS solver is used by default for nonlinear analysis at subcase 1.
************************************************************************
************************************************************************
FINITE ELEMENT MODEL DATA INFORMATION :
---------------------------------------
Total # of Grids (Structural) : 257667
Total # of Elements : 460807
Total # of Rigid Elements : 17
Total # of Rigid Element Constraints : 12198
Total # of Local Coordinate Systems : 1
Total # of Degrees of Freedom : 1334914
(Structural)
Total # of Non-zero Stiffness Terms : 34898882
Element Type Information
------------------------
CHEXA Elements : 2294
CTETRA Elements : 264376
CPENTA Elements : 16
CONM2 Elements : 6
CQUAD4 Elements : 193556
CTRIA3 Elements : 559
Load and Boundary Information
-----------------------------
FORCE Sets : 3
SPC Sets : 3
Material and Property Information
---------------------------------
PSOLID Cards : 3
PSHELL Cards : 15
PBUSH Cards : 1
MAT1 Cards : 9
MATS1 Cards : 1
************************************************************************
************************************************************************
OPTIMIZATION PROBLEM PARAMETERS :
---------------------------------
NO DESIGN MATERIAL OR DESIGN VARIABLES FOUND : ANALYSIS ONLY
------------------------
Static Subcase Summary :
------------------------
---------- -------- --------
Subcase ID SPC ID FORCE ID
---------- -------- --------
1 15 11
---------- -------- --------
Run Type : Analysis Only
Run at location : 
/Calculation/ZEA/
Scratch file directory : /Calculation/ZEA/
Free space: 1885.787 GB
Number of CPU processors : 4
************************************************************************
************************************************************************
MEMORY ESTIMATION INFORMATION :
-------------------------------
Solver Type is: Sparse-Matrix Solver
Direct Method
Current Memory (RAM) : 7367 MB
MUMPS Solver will run with In-Core Solution.
Estimated Minimum Memory (RAM) for Out of Core Solution : 8764 MB
Recommended Memory (RAM) for Out of Core Solution : 9188 MB
Recommended Memory (RAM) for In-Core Solution : 13115 MB
(MUMPS solver allocates memory separately from OptiStruct,
Its memory requirement has been included in this report.)
DISK SPACE ESTIMATION INFORMATION :
-----------------------------------
Estimated Disk Space for Output Data Files : 484 MB
Estimated Scratch Disk Space for In-Core Solution : 621 MB
Estimated Scratch Disk Space for Out of Core Solution : 4548 MB
************************************************************************
BEGINNING ANALYSIS SOLUTION ....
************************************************************************
ANALYSIS RESULTS :
------------------
ITERATION 0
Element # 403098, element type TETRA.
WARNING - Outside of recommended range: Edge Angle = 81.184
upper limit = 75.000
Element # 403187, element type TETRA.
WARNING - Outside of recommended range: Edge Angle = 81.605
upper limit = 75.000
Element # 403203, element type TETRA.
WARNING - Outside of recommended range: Edge Angle = 81.464
upper limit = 75.000
NOTE : other similar error/warning messages were suppressed,
use PARAM,CHECKEL,FULL to obtain full report
Element # 404018, element type TETRA.
WARNING - Outside of recommended range: Face Vertex Angle = 14.665
lower limit = 15.000
Element # 404449, element type TETRA.
WARNING - Outside of recommended range: Face Vertex Angle = 14.665
lower limit = 15.000
Element # 405006, element type TETRA.
WARNING - Outside of recommended range: Face Vertex Angle = 11.803
lower limit = 15.000
Element # 413310, element type TETRA.
WARNING - Outside of recommended range: Face Skew Angle = 76.111
upper limit = 75.000
Element # 421640, element type TETRA.
WARNING - Outside of recommended range: Face Skew Angle = 76.292
upper limit = 75.000
Element # 441613, element type TETRA.
WARNING - Outside of recommended range: Face Skew Angle = 76.292
upper limit = 75.000
Element Quality Check Summary
-----------------------------
Total # of elements that exceeded recommended range (warning) = 5496
Note: Only element with the highest violation of each check is listed below.
Recommended range violations:
------------------------------------------------------------------------------
Element Property # of Recommended Range Max. Viol. Elem.
Viol. Lower Upper Value type No.
------- ------------------- -------- --------- --------- --------- --- -------
TETRA Face Skew Angle 24 -- 75.00 79.36 U 569477
TETRA Edge Angle 5361 -- 75.00 86.57 U 612113
TETRA Face Vertex Angle 215 15.00 165.00 6.63 L 578053
List of Auto-SPC d.o.f.s for loadcase 1
Total number of Auto-SPC d.o.f.s = 1584
------------------------------
Grid No. Component
------------------------------
7566 4 5 6
7569 4 5 6
7580 4 5 6
7582 4 5 6
7591 4 5 6
7592 4 5 6
7597 4 5 6
7619 4 5 6
7620 4 5 6
7637 4 5 6
7667 4 5 6
7693 4 5 6
7699 4 5 6
7711 4 5 6
7712 4 5 6
7715 4 5 6
7729 4 5 6
7737 4 5 6
7738 4 5 6
7739 4 5 6
7741 4 5 6
7746 4 5 6
7747 4 5 6
7759 4 5 6
7766 4 5 6
8238 4 5 6
8239 4 5 6
8287 4 5 6
8288 4 5 6
8289 4 5 6
8290 4 5 6
8292 4 5 6
8318 4 5 6
8355 4 5 6
------------------------------
Because of PARAM, PRGPST, 100, Auto-SPC printing is limited to 100 dofs.
Nonlinear iteration summary for Subcase 1
Subcase 1 Load step: 1.0000E-01
--------------------------------------------------------------------------------
Nonlinear Err. Measures Gap and Contact Element Status Maximum
Iter Avg. U EUI EPI EWI Open Closed Stick Slip Frozen Plststrn
--------------------------------------------------------------------------------
1 3.27E-05 9.90E+01 2.69E-10 2.69E-10 0 0 0 0 0 0.00E+00
2 3.27E-05 1.49E-02 1.65E-10 1.91E-12 0 0 0 0 0 0.00E+00
3 3.26E-05 9.98E+00 1.60E-10 7.84E-12 0 0 0 0 0 0.00E+00
4 3.26E-05 8.53E-02 1.53E-10 3.18E-12 0 0 0 0 0 0.00E+00
5 3.29E-05 8.59E+00 1.49E-10 6.29E-12 0 0 0 0 0 0.00E+00
6 3.29E-05 4.15E-03 1.45E-10 4.18E-13 0 0 0 0 0 0.00E+00
7 3.31E-05 3.28E+00 1.44E-10 2.10E-12 0 0 0 0 0 0.00E+00
8 3.31E-05 3.90E-03 1.43E-10 3.20E-13 0 0 0 0 0 0.00E+00
9 3.33E-05 3.31E+00 1.43E-10 2.27E-12 0 0 0 0 0 0.00E+00
10 3.32E-05 6.81E-02 1.44E-10 1.42E-12 0 0 0 0 0 0.00E+00
11 3.32E-05 2.79E-04 1.43E-10 4.72E-14 0 0 0 0 0 0.00E+00
Subcase 1 Load step: 2.0000E-01
--------------------------------------------------------------------------------
Nonlinear Err. Measures Gap and Contact Element Status Maximum
Iter Avg. U EUI EPI EWI Open Closed Stick Slip Frozen Plststrn
--------------------------------------------------------------------------------
1 6.52E-05 4.80E+01 5.82E-02 2.90E-02 0 0 0 0 0 4.46E-04
2 6.55E-05 3.43E-02 4.50E-04 9.49E-06 0 0 0 0 0 5.62E-04
3 6.55E-05 8.38E-03 2.95E-08 3.12E-10 0 0 0 0 0 5.63E-04
4 6.56E-05 3.89E+00 2.25E-10 4.63E-12 0 0 0 0 0 5.63E-04
5 6.59E-05 4.45E-01 1.76E-10 2.77E-12 0 0 0 0 0 5.63E-04
6 6.60E-05 8.77E-03 1.67E-10 6.58E-13 0 0 0 0 0 5.63E-04
7 6.62E-05 2.30E+00 1.62E-10 1.61E-12 0 0 0 0 0 5.63E-04
8 6.72E-05 7.83E+00 1.62E-10 6.39E-12 0 0 0 0 0 5.63E-04
9 6.76E-05 2.91E-02 1.59E-10 1.93E-12 0 0 0 0 0 5.63E-04
10 6.85E-05 5.11E+00 1.59E-10 4.23E-12 0 0 0 0 0 5.63E-04
11 6.85E-05 2.91E-04 1.57E-10 4.48E-14 0 0 0 0 0 5.63E-04
Subcase 1 Load step: 2.7273E-01
--------------------------------------------------------------------------------
Nonlinear Err. Measures Gap and Contact Element Status Maximum
Iter Avg. U EUI EPI EWI Open Closed Stick Slip Frozen Plststrn
--------------------------------------------------------------------------------
1 9.06E-05 2.48E+01 2.43E-01 6.43E-02 0 0 0 0 0 1.22E-03
2 9.21E-05 1.71E-02 2.26E-02 8.97E-04 0 0 0 0 0 1.72E-03
3 9.29E-05 3.73E+00 6.69E-04 9.13E-06 0 0 0 0 0 1.76E-03
4 9.29E-05 1.89E-03 1.44E-05 5.88E-08 0 0 0 0 0 1.76E-03
5 9.38E-05 3.49E+00 1.05E-08 4.29E-10 0 0 0 0 0 1.76E-03
6 9.44E-05 9.32E-02 5.39E-10 3.70E-12 0 0 0 0 0 1.76E-03
7 9.51E-05 1.86E-01 3.18E-10 2.27E-12 0 0 0 0 0 1.76E-03
8 9.61E-05 3.41E+00 2.70E-10 3.82E-12 0 0 0 0 0 1.76E-03
9 9.74E-05 3.60E+00 2.49E-10 4.11E-12 0 0 0 0 0 1.76E-03
10 9.82E-05 5.11E-02 2.39E-10 2.40E-12 0 0 0 0 0 1.76E-03
11 1.00E-04 5.04E+00 2.36E-10 6.48E-12 0 0 0 0 0 1.76E-03
12 1.01E-04 2.18E-02 2.31E-10 2.18E-12 0 0 0 0 0 1.76E-03
13 9.98E-05 3.10E+00 2.22E-10 3.88E-12 0 0 0 0 0 1.76E-03
14 1.00E-04 1.63E-02 2.17E-10 1.44E-12 0 0 0 0 0 1.76E-03
15 9.87E-05 3.83E+00 2.13E-10 4.86E-12 0 0 0 0 0 1.76E-03
16 9.89E-05 2.68E-03 2.06E-10 4.94E-13 0 0 0 0 0 1.76E-03
17 9.92E-05 9.06E-01 2.01E-10 1.08E-12 0 0 0 0 0 1.76E-03
18 1.00E-04 1.79E+00 2.01E-10 2.21E-12 0 0 0 0 0 1.76E-03
19 9.89E-05 2.63E+00 2.02E-10 3.44E-12 0 0 0 0 0 1.76E-03
20 9.94E-05 1.73E-02 1.94E-10 1.31E-12 0 0 0 0 0 1.76E-03
21 9.82E-05 2.99E+00 1.88E-10 3.50E-12 0 0 0 0 0 1.76E-03
22 9.72E-05 1.43E-01 1.80E-10 2.62E-12 0 0 0 0 0 1.76E-03
23 9.74E-05 2.55E-03 1.76E-10 4.07E-13 0 0 0 0 0 1.76E-03
24 9.69E-05 1.25E+00 1.74E-10 1.32E-12 0 0 0 0 0 1.76E-03
25 9.71E-05 6.38E-03 1.73E-10 4.89E-13 0 0 0 0 0 1.76E-03
No convergence after 25 iterations
Expert: Continue iterations
26 9.74E-05 9.12E-01 1.73E-10 9.67E-13 0 0 0 0 0 1.76E-03
27 9.84E-05 2.52E+00 1.80E-10 3.02E-12 0 0 0 0 0 1.76E-03
28 9.71E-05 3.58E+00 1.78E-10 4.30E-12 0 0 0 0 0 1.76E-03
29 9.85E-05 3.78E+00 1.82E-10 4.93E-12 0 0 0 0 0 1.76E-03
30 9.86E-05 1.29E-03 1.81E-10 2.81E-13 0 0 0 0 0 1.76E-03
31 9.95E-05 2.00E+00 1.78E-10 2.37E-12 0 0 0 0 0 1.76E-03
32 1.01E-04 4.25E+00 1.86E-10 5.44E-12 0 0 0 0 0 1.76E-03
33 1.01E-04 8.84E-03 1.86E-10 1.20E-12 0 0 0 0 0 1.76E-03
34 1.00E-04 1.32E+00 1.87E-10 1.67E-12 0 0 0 0 0 1.76E-03
35 1.01E-04 1.72E-01 1.92E-10 1.58E-12 0 0 0 0 0 1.76E-03
No convergence after 35 iterations
Expert: Back off, adjust and retry
Subcase 1 Load step: 2.3636E-01
--------------------------------------------------------------------------------
Nonlinear Err. Measures Gap and Contact Element Status Maximum
Iter Avg. U EUI EPI EWI Open Closed Stick Slip Frozen Plststrn
--------------------------------------------------------------------------------
1 7.91E-05 1.58E+01 1.14E-01 1.74E-02 0 0 0 0 0 8.89E-04
2 7.97E-05 8.60E-03 2.92E-03 6.08E-05 0 0 0 0 0 1.12E-03
3 7.91E-05 3.73E+00 3.58E-07 8.22E-09 0 0 0 0 0 1.13E-03
4 7.97E-05 6.50E-01 3.33E-10 6.84E-12 0 0 0 0 0 1.13E-03
5 7.94E-05 5.09E-02 2.19E-10 3.06E-12 0 0 0 0 0 1.13E-03
6 7.96E-05 4.95E-02 1.66E-10 1.41E-12 0 0 0 0 0 1.13E-03
7 8.01E-05 2.47E+00 1.54E-10 1.94E-12 0 0 0 0 0 1.13E-03
8 8.08E-05 3.44E+00 1.51E-10 2.59E-12 0 0 0 0 0 1.13E-03
9 7.99E-05 4.26E+00 1.49E-10 3.11E-12 0 0 0 0 0 1.13E-03
10 8.00E-05 2.17E-03 1.49E-10 2.45E-13 0 0 0 0 0 1.13E-03
11 8.05E-05 2.45E+00 1.48E-10 1.76E-12 0 0 0 0 0 1.13E-03
12 8.07E-05 1.35E-02 1.48E-10 6.69E-13 0 0 0 0 0 1.13E-03
13 8.06E-05 3.21E-03 1.48E-10 2.66E-13 0 0 0 0 0 1.13E-03
14 8.02E-05 1.90E+00 1.48E-10 1.34E-12 0 0 0 0 0 1.13E-03
15 8.11E-05 4.16E+00 1.49E-10 3.07E-12 0 0 0 0 0 1.13E-03
16 8.17E-05 6.13E-02 1.49E-10 1.76E-12 0 0 0 0 0 1.13E-03
17 8.24E-05 3.35E-01 1.50E-10 1.84E-12 0 0 0 0 0 1.13E-03
18 8.32E-05 2.58E+00 1.50E-10 2.00E-12 0 0 0 0 0 1.13E-03
19 8.40E-05 2.78E+00 1.55E-10 2.38E-12 0 0 0 0 0 1.13E-03
20 8.37E-05 1.30E-02 1.55E-10 8.60E-13 0 0 0 0 0 1.13E-03
21 8.39E-05 4.64E-03 1.55E-10 4.00E-13 0 0 0 0 0 1.13E-03
22 8.42E-05 8.88E-01 1.56E-10 7.92E-13 0 0 0 0 0 1.13E-03
23 8.38E-05 1.12E+00 1.56E-10 9.76E-13 0 0 0 0 0 1.13E-03
24 8.52E-05 4.05E+00 1.61E-10 3.96E-12 0 0 0 0 0 1.13E-03
25 8.37E-05 4.46E+00 1.60E-10 4.26E-12 0 0 0 0 0 1.13E-03
No convergence after 25 iterations
Expert: Back off, adjust and retry
Subcase 1 Load step: 2.1818E-01
--------------------------------------------------------------------------------
Nonlinear Err. Measures Gap and Contact Element Status Maximum
Iter Avg. U EUI EPI EWI Open Closed Stick Slip Frozen Plststrn
--------------------------------------------------------------------------------
1 7.34E-05 1.03E+01 5.50E-02 4.55E-03 0 0 0 0 0 7.25E-04
2 7.30E-05 5.35E-02 3.15E-04 5.21E-06 0 0 0 0 0 8.23E-04
3 7.30E-05 3.66E-04 4.16E-08 3.88E-11 0 0 0 0 0 8.25E-04
Subcase 1 Load step: 2.4545E-01
--------------------------------------------------------------------------------
Nonlinear Err. Measures Gap and Contact Element Status Maximum
Iter Avg. U EUI EPI EWI Open Closed Stick Slip Frozen Plststrn
--------------------------------------------------------------------------------
1 8.28E-05 1.35E+01 9.63E-02 1.06E-02 0 0 0 0 0 1.07E-03
2 8.30E-05 8.34E-03 2.79E-03 4.31E-05 0 0 0 0 0 1.28E-03
3 8.33E-05 1.73E+00 7.19E-07 1.16E-09 0 0 0 0 0 1.28E-03
4 8.37E-05 1.74E+00 3.72E-10 2.69E-12 0 0 0 0 0 1.28E-03
5 8.34E-05 1.02E-01 2.63E-10 1.81E-12 0 0 0 0 0 1.28E-03
6 8.37E-05 1.62E-01 2.00E-10 1.26E-12 0 0 0 0 0 1.28E-03
7 8.40E-05 5.67E-01 1.75E-10 1.10E-12 0 0 0 0 0 1.28E-03
8 8.46E-05 2.31E+00 1.68E-10 1.85E-12 0 0 0 0 0 1.28E-03
9 8.36E-05 4.25E+00 1.64E-10 3.36E-12 0 0 0 0 0 1.28E-03
10 8.29E-05 2.47E-01 1.62E-10 2.65E-12 0 0 0 0 0 1.28E-03
11 8.33E-05 4.36E-02 1.60E-10 1.53E-12 0 0 0 0 0 1.28E-03
12 8.37E-05 1.23E-01 1.59E-10 1.48E-12 0 0 0 0 0 1.28E-03
13 8.48E-05 4.69E+00 1.61E-10 3.80E-12 0 0 0 0 0 1.28E-03
14 8.43E-05 4.29E-02 1.60E-10 1.78E-12 0 0 0 0 0 1.28E-03
15 8.48E-05 8.06E-02 1.60E-10 1.57E-12 0 0 0 0 0 1.28E-03
16 8.46E-05 4.56E-03 1.59E-10 4.32E-13 0 0 0 0 0 1.28E-03
17 8.38E-05 3.39E+00 1.59E-10 2.66E-12 0 0 0 0 0 1.28E-03
18 8.49E-05 4.38E+00 1.60E-10 3.55E-12 0 0 0 0 0 1.28E-03
19 8.45E-05 2.50E-02 1.60E-10 1.35E-12 0 0 0 0 0 1.28E-03
20 8.46E-05 6.47E-03 1.61E-10 5.63E-13 0 0 0 0 0 1.28E-03
21 8.49E-05 8.96E-01 1.61E-10 7.19E-13 0 0 0 0 0 1.28E-03
22 8.50E-05 6.03E-03 1.60E-10 3.02E-13 0 0 0 0 0 1.28E-03
23 8.45E-05 1.86E+00 1.60E-10 1.49E-12 0 0 0 0 0 1.28E-03
24 8.50E-05 2.04E+00 1.60E-10 1.61E-12 0 0 0 0 0 1.28E-03
25 8.43E-05 2.82E+00 1.59E-10 2.19E-12 0 0 0 0 0 1.28E-03
No convergence after 25 iterations
Expert: Back off, adjust and retry
Subcase 1 Load step: 2.3182E-01
--------------------------------------------------------------------------------
Nonlinear Err. Measures Gap and Contact Element Status Maximum
Iter Avg. U EUI EPI EWI Open Closed Stick Slip Frozen Plststrn
--------------------------------------------------------------------------------
1 7.86E-05 1.07E+01 4.90E-02 2.91E-03 0 0 0 0 0 9.47E-04
2 7.88E-05 3.53E-04 7.23E-04 4.48E-06 0 0 0 0 0 1.05E-03
3 7.89E-05 5.85E-01 1.62E-07 1.21E-09 0 0 0 0 0 1.05E-03
4 8.07E-05 7.10E+00 2.63E-10 1.02E-11 0 0 0 0 0 1.05E-03
5 8.25E-05 5.61E-01 2.37E-10 6.89E-12 0 0 0 0 0 1.05E-03
6 8.32E-05 2.71E-02 1.86E-10 2.43E-12 0 0 0 0 0 1.05E-03
7 8.43E-05 2.89E+00 1.80E-10 3.45E-12 0 0 0 0 0 1.05E-03
8 8.45E-05 6.98E-03 1.72E-10 7.98E-13 0 0 0 0 0 1.05E-03
9 8.49E-05 4.74E-01 1.71E-10 9.59E-13 0 0 0 0 0 1.05E-03
10 8.65E-05 3.99E+00 1.80E-10 5.09E-12 0 0 0 0 0 1.05E-03
11 8.51E-05 3.15E-01 1.75E-10 4.24E-12 0 0 0 0 0 1.05E-03
12 8.41E-05 1.09E-01 1.71E-10 3.12E-12 0 0 0 0 0 1.05E-03
13 8.38E-05 5.17E-03 1.71E-10 7.69E-13 0 0 0 0 0 1.05E-03
14 8.44E-05 1.64E+00 1.68E-10 1.80E-12 0 0 0 0 0 1.05E-03
15 8.43E-05 3.80E-03 1.68E-10 4.28E-13 0 0 0 0 0 1.05E-03
16 8.36E-05 1.92E+00 1.70E-10 2.14E-12 0 0 0 0 0 1.05E-03
17 8.34E-05 5.45E-03 1.66E-10 5.49E-13 0 0 0 0 0 1.05E-03
18 8.49E-05 3.94E+00 1.72E-10 4.58E-12 0 0 0 0 0 1.05E-03
19 8.59E-05 8.55E-02 1.79E-10 3.24E-12 0 0 0 0 0 1.05E-03
20 8.68E-05 7.90E-02 1.76E-10 2.47E-12 0 0 0 0 0 1.05E-03
21 8.59E-05 2.25E+00 1.74E-10 2.64E-12 0 0 0 0 0 1.05E-03
22 8.66E-05 9.11E-02 1.80E-10 2.17E-12 0 0 0 0 0 1.05E-03
23 8.51E-05 3.56E+00 1.76E-10 4.34E-12 0 0 0 0 0 1.05E-03
24 8.56E-05 1.65E-02 1.76E-10 1.51E-12 0 0 0 0 0 1.05E-03
25 8.55E-05 2.91E-03 1.78E-10 5.17E-13 0 0 0 0 0 1.05E-03
No convergence after 25 iterations
Expert: Continue iterations
26 8.62E-05 1.84E+00 1.75E-10 2.18E-12 0 0 0 0 0 1.05E-03
27 8.74E-05 2.63E+00 1.76E-10 3.14E-12 0 0 0 0 0 1.05E-03
28 8.81E-05 3.85E-02 1.84E-10 1.97E-12 0 0 0 0 0 1.05E-03
29 8.92E-05 2.26E+00 1.89E-10 3.11E-12 0 0 0 0 0 1.05E-03
30 8.79E-05 2.69E+00 1.80E-10 3.43E-12 0 0 0 0 0 1.05E-03
31 8.81E-05 2.04E-03 1.78E-10 3.65E-13 0 0 0 0 0 1.05E-03
32 8.80E-05 1.47E-03 1.80E-10 1.94E-13 0 0 0 0 0 1.05E-03
33 8.97E-05 3.36E+00 1.87E-10 4.51E-12 0 0 0 0 0 1.05E-03
34 8.98E-05 2.29E-03 1.89E-10 4.66E-13 0 0 0 0 0 1.05E-03
35 8.90E-05 1.76E+00 1.87E-10 2.34E-12 0 0 0 0 0 1.05E-03
No convergence after 35 iterations
Expert: Terminate nonlinear process
*** Nonlinear solution failed to converge for Subcase 1 ***
*** ERROR # 941 ***
NON-CONVERGENT NONLINEAR ITERATIONS FOR SUBCASE 1
Suggestions:
(Scratch disk space usage for starting iteration = 621 MB)
(Running in-core solution)
Volume = 1.69959E+08 Mass = 7.41176E+00
Subcase Compliance Epsilon
1 0.000000E+00 -6.018347E-11
Note : Epsilon = Residual Strain Energy Ratio.
************************************************************************
ANALYSIS COMPLETED.
*** SOME ERRORS WERE REPORTED DURING THE RUN,
*** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID.
This error occurs in module "wrtdrv".
************************************************************************
RESOURCE USAGE INFORMATION
--------------------------
MAXIMUM MEMORY USED 12977 MB
IN ADDITION 1 MB MEMORY WAS ALLOCATED FOR TEMPORARY USE
INCLUDING MEMORY FOR MUMPS 5610 MB
MAXIMUM DISK SPACE USED 15370 MB
INCLUDING DISK SPACE FOR MUMPS 699 MB
************************************************************************
************************************************************************
COMPUTE TIME INFORMATION
------------------------
EXECUTION STARTED Fri Oct 16 09:02:40 2020
EXECUTION COMPLETED Fri Oct 16 10:04:29 2020
ELAPSED TIME 01:01:49
CPU TIME 03:35:44
************************************************************************
*** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED.
***** END OF REPORT *****
For Useful OptiStruct Tips and Tricks, go to the URL:
http://www.altairhyperworks.com/tips.aspx
PROGRAM STOPPED DUE TO ERROR.
************************************************************************
A fatal error has occurred during computations:
*** ERROR # 941 ***
NON-CONVERGENT NONLINEAR ITERATIONS FOR SUBCASE 1
Suggestions:
ANALYSIS COMPLETED.
*** SOME ERRORS WERE REPORTED DURING THE RUN,
*** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID.
...
*** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED.
************************************************************************
Answers
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use CheckEL Card to ignore element quality
0 -
Element # 421640, element type TETRA. this element need to convert in CTETRA.
0 -
unfortunetely, none of these will solver your issue.
What version of OptiStruct are you using?
I would try a few things.
- add the control card PARAM, NLMON, DISP in order to wirte a more detailed output and an additional H3D file showing each iteration >> then load the H3D file and take a look if there's anything strrange going on; Also check the _nl.out file for more detailed description of errors.
- Add the control card PARAM, EXPERTNL, YES and give it a try to check if the convergence improves
Try to change to LGDISP loadcase (activate NLPARM(LGDISP)), and also add NLADAPT (DTMAX field) in order to have a better control in the load increment. If I recall correctly, this is already available for Small Disp Loadcases in newer versions. But depending on what version you're using it will be available only for LGDISP.
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Mahipal Mor said:
use CheckEL Card to ignore element quality
Hi,
Thanks for your reply!
But there is no information showing the model could not pass the element quality check. Moreover, I run with CheckEL but it still shows the problem.
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Adriano Koga_20259 said:
unfortunetely, none of these will solver your issue.
What version of OptiStruct are you using?
I would try a few things.
- add the control card PARAM, NLMON, DISP in order to wirte a more detailed output and an additional H3D file showing each iteration >> then load the H3D file and take a look if there's anything strrange going on; Also check the _nl.out file for more detailed description of errors.
- Add the control card PARAM, EXPERTNL, YES and give it a try to check if the convergence improves
Try to change to LGDISP loadcase (activate NLPARM(LGDISP)), and also add NLADAPT (DTMAX field) in order to have a better control in the load increment. If I recall correctly, this is already available for Small Disp Loadcases in newer versions. But depending on what version you're using it will be available only for LGDISP.
Hi,
Thanks for your reply!
The version I'm using is hw2019. I use hw2020 to calculate it again and it shows the different error.
*** ERROR # 3423 ***
MUMPS solver encountered error with code -90.
please contact support and provide .out and .stat files.
It's very strange. No information shows the problem with my model.
I will follow your suggestion to have a try. Thanks!
0 -
Yvette said:
Hi,
Thanks for your reply!
The version I'm using is hw2019. I use hw2020 to calculate it again and it shows the different error.
*** ERROR # 3423 ***
MUMPS solver encountered error with code -90.
please contact support and provide .out and .stat files.
It's very strange. No information shows the problem with my model.
I will follow your suggestion to have a try. Thanks!
yes, please.
the best option to figure it out is to add PARAM,NLMON,DISP and inspect the new H3D and the nl.out file. It will show you which node has some large errors and then you can investigate further.
0