Learning Forum

[boonthiam13]

Dear all:nI am wondering there is no result generated even though there is no error message. I paste below the message generated in the solution information, appreciate if anyone could help on this:nn SOLUTION MONITORING INFO IS WRITTEN TO FILE= file.mntr                                                                                                                                                                                                                                                          n MAXIMUM NUMBER OF EQUILIBRIUM ITERATIONS HAS BEEN MODIFIED             n TO BE, NEQIT = 26, BY SOLUTION CONTROL LOGIC.                          *** NOTE ***                           CP =    160.953  TIME= 22:20:14n The PCG solver has automatically set the level of difficulty for this  n model to 2.                                                                                    *********** PRECISE MASS SUMMARY ***********nn  TOTAL RIGID BODY MASS MATRIX ABOUT ORIGINn              Translational mass              |  Coupled translational/rotational massn        995.67       0.0000       0.0000    |    0.0000      -62.434       3164.1   n        0.0000       995.67       0.0000    |    62.434       0.0000       14024.   n        0.0000       0.0000       995.67    |   -3164.1      -14024.       0.0000   n    ------------------------------------------ | ------------------------------------------n                                               |        Rotational mass (inertia)n                                               |    10085.       44569.       878.24   n                                               |    44569.      0.23508E+06  -197.47   n                                               |    878.24      -197.47      0.24511E+06nn  TOTAL MASS = 995.67   n    The mass principal axes coincide with the global Cartesian axesnn  CENTER OF MASS (X,Y,Z)=   14.086      -3.1779     -0.62705E-01nn  TOTAL INERTIA ABOUT CENTER OF MASSn        26.259      0.93403      -1.1689   n       0.93403       37529.      0.93564   n       -1.1689      0.93564       37508.   n    The inertia principal axes coincide with the global Cartesian axes *** MASS SUMMARY BY ELEMENT TYPE ***nn TYPE     MASSn    1 0.462844E-02 (and more)n   n Range of element maximum matrix coefficients in global coordinatesn Maximum = 1.511907397E+11 at element 111027.                           n Minimum = 0.231510323 at element 1280589.                              nn *** WARNING ***                        CP =    174.562  TIME= 22:20:30n Coefficient ratio exceeds 1.0e8 - Check results.                       nn  *** ELEMENT MATRIX FORMULATION TIMESn    TYPE   NUMBER  ENAME     TOTAL CP AVE CPnn       1      348 SOLID187     0.047  0.000135 (and more)n       n Time at end of element matrix formulation CP = 174.5625.               nn ALL CURRENT ANSYS DATA WRITTEN TO FILE NAME= file.rdbn FOR POSSIBLE RESUME FROM THIS POINTn    FORCE CONVERGENCE VALUE = 0.1741E+05 CRITERION=  2.614   n curEqn= 41752 totEqn= 66058 Job CP sec=   184.672n     Factor Done= 51% Factor Wall sec=     1.068 rate=  10043.5 Mflopsn curEqn= 66058 totEqn= 66058 Job CP sec=   185.406n     Factor Done= 100% Factor Wall sec=     1.953 rate=  10713.8 Mflopsn Iteration=   25 Ratio= 0.239244    Limit= 1.000000E-08 Wall=    5.6n Iteration=  340 Ratio= 3.423218E-03 Limit= 1.000000E-08 Wall=   81.4n Iteration=  480 Ratio= 9.467716E-04 Limit= 1.000000E-08 Wall=  118.5n Iteration=  730 Ratio= 8.474767E-05 Limit= 1.000000E-08 Wall=  195.6n Iteration= 1055 Ratio= 7.037492E-06 Limit= 1.000000E-08 Wall=  293.3n Iteration= 1135 Ratio= 2.552964E-06 Limit= 1.000000E-08 Wall=  317.3n Iteration= 1495 Ratio= 2.025803E-07 Limit= 1.000000E-08 Wall=  419.4n Iteration= 1810 Ratio= 1.159087E-08 Limit= 1.000000E-08 Wall=  495.2nn DISTRIBUTED PCG SOLVER SOLUTION CONVERGEDnn DISTRIBUTED PCG SOLVER SOLUTION STATISTICSnn  NUMBER OF DOMAINS  =       4735n  NUMBER OF ITERATIONS=       1812n  NUMBER OF EQUATIONS =    1999062n  LEVEL OF CONVERGENCE=          1n  CALCULATED NORM    = 0.99364E-08n  SPECIFIED TOLERANCE = 0.10000E-07n  TOTAL CPU TIME (sec)=     477.52n  TOTAL WALL TIME(sec)=     501.85n  TOTAL MEMORY (GB)  =       1.77nn    DISP CONVERGENCE VALUE  = 0.3643E-03 CRITERION= 0.1859E-04n   EQUIL ITER  1 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= -0.3643E-03n    DISP CONVERGENCE VALUE  = 0.3643E-03 CRITERION= 0.1897E-04n    LINE SEARCH PARAMETER =  1.000    SCALED MAX DOF INC = -0.3643E-03n    FORCE CONVERGENCE VALUE =  1676.     CRITERION=  82.04   n   EQUIL ITER  2 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= -0.5687E-03n    DISP CONVERGENCE VALUE  = 0.2843E-04 CRITERION= 0.2033E-04n    LINE SEARCH PARAMETER = 0.5000E-01 SCALED MAX DOF INC = -0.2843E-04n    FORCE CONVERGENCE VALUE =  2836.     CRITERION=  83.03   nn Thank you n

[peteroznewman]

nThe solution successfully completed. nA Static Structural analysis doesn't have any results pre-made to plot. You have to insert a Total Deformation or a Stress plot and Evaluate All Results to get those plots made.n

[boonthiam13]

Hi Peter, great to have you on my question. But the red lightning bolt appears next to the solution and solution information. What is causing to this actually?n

[peteroznewman]

nThe first substep converged. You can view that in the results.nThe red lightning bolt is there because the solver stopped before it got to the End Time.nYou didn't show the full Solution Output. Did the word Error appear?nOn the Solution Information folder, show the Force Convergence Plot.n

[boonthiam13]

Peter, the full solution output is attached. There is no error message in the solution information but there is an error message associated with warning message as below:nnAs you mentioned, appearance of the red lightning bolt is because of the solver stopped before it got to the End Time. What is the possible cause leading to this as I didn't stop it halfway.nI attached the force convergence plot as well as the details of analysis setting for your reference. Very much appreciate your kind assistance. Looking forward to hearing from you soon nArray

[boonthiam13]

peteroznewman nHi Peter, I just realized that in my model, ANSYS has selected displacement as the convergence criteria, rather than force. Why is this happening and can we consider the model is solve if the displacement has achieved full convergence? Also, the iteration stops at 20 and did not continue further, how should we tackle this issue?nn

[peteroznewman]

nAnsys typically selects two or three criteria to check convergence. You can choose which one you want to plot. nThe way to fix this problem is usually to change the Analysis Settings.nTurn on Auto Time SteppingnSet the Initial Substeps to 10 or higher.n