Unable to run Solver
Altair Forum User
Altair Employee
Altair EmployeeHi, I can't seem to run the Optistruct solver because it cannot run element cleanup. I am new to Hyperworks application and do not know what is wrong with the particular element.
Thanks for the help.
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Here is a better picture
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Can you please post the '.out' and '.stat' file of your FEM problem?
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The amount of memory allocated for the run is 300 MB.This run will use in-core processing in the solver.Element # 3878, element type TETRA.*** PROGRAM STOPPED: ERRORS DURING ELEMENT QUALITY CHECK.************************************************************************A fatal error has occurred during computations:*** PROGRAM STOPPED: ERRORS DURING ELEMENT QUALITY CHECK.0
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OPTIMIZATION PROBLEM PARAMETERS :---------------------------------Objective Function : Minimize Weighted Compliance------------------Response Summary :------------------Number of volume fraction responses : 1Number of compliance responses : 1Number of equation responses : 1------------------------Static Subcase Summary :---------------------------------- -------- -------- --------------Subcase ID SPC ID LOAD ID Weight = w(i)---------- -------- -------- --------------1 1 2 1.000---------- -------- -------- -----------------------------------------Design Parameters Summary :---------------------------Total # of topology design elements : 3098Total # of topology cards : 1Total Volume of Design Material : 2.1107E+02Total Mass of Design Material : 5.6988E-04Volume of Non-Design Material : 0.0000E+00Mass of Non-Design Material : 0.0000E+00Solid Design Elements : PSOLID--------------------- --------1---------------------------------Optimization Parameters Summary :---------------------------------Initial Material Fraction [0,1] : 0.5100Minimum Element Volume Fraction : 0.0100Discreteness Parameter : 1.0000Topology Optimization Method : Density MethodMaximum Number of Iterations : 30Convergence Tolerance : 5.0000E-03Step Size (Topology) : 0.5000Checkerboard Control : On (1 - Global Averaging)Run Type : Topology Optimization-------------------------------Topology Optimization Summary :--------------------------------------- ----------- ----------- -----------DTPL ID Minimum Maximum MinimumMember Size Member Size Gap Size-------- ----------- ----------- -----------1-------- ----------- ----------- ------------------- ------- ------- ----------- ----------- ----------- -----------DTPL ID Pattern Pattern Draw Dir. Stamping No Hole ExtrusionRepet. Group. Constraints Constraints Constraints Constraints-------- ------- ------- ----------- ----------- ----------- -----------1 NONE NONE NONE NONE NONE NONE-------- ------- ------- ----------- ----------- ----------- -----------Restart from previous solution : NoScratch file directory : ./Free space: 340.359 GBNumber of CPU processors : 1************************************************************************************************************************************************MEMORY ESTIMATION INFORMATION :-------------------------------Solver Type is: Sparse-Matrix SolverDirect MethodCurrent Memory (RAM) : 100 MBIn addition a ramdisk area was allocated in memory : 200 MBEstimated Minimum Memory (RAM) for Out of Core Solution : 6 MBRecommended Memory (RAM) for Out of Core Solution : 6 MBRecommended Memory (RAM) for In-Core Solution : 7 MB(Note: The Minimum Memory Requirement is limited by Sensitivity Module.)DISK SPACE ESTIMATION INFORMATION :-----------------------------------Estimated Disk Space for Output Data Files : 6 MBEstimated Scratch Disk Space for In-Core Solution : 5 MBEstimated Scratch Disk Space for Out of Core Solution : 8 MB************************************************************************BEGINNING OPTIMIZATION SOLUTION ....************************************************************************OPTIMIZATION HISTORY INFORMATION :----------------------------------ITERATION 0Element # 2354, element type TETRA.WARNING - Outside of recommended range: Face Skew Angle = 75.270upper limit = 75.000WARNING - Outside of recommended range: Face Vertex Angle = 7.5045lower limit = 15.000WARNING - Outside of recommended range: Edge Angle = 80.092upper limit = 75.000Element # 2376, element type TETRA.WARNING - Outside of recommended range: Face Vertex Angle = 13.291lower limit = 15.000WARNING - Outside of recommended range: Edge Angle = 75.141upper limit = 75.000Element # 2399, element type TETRA.WARNING - Outside of recommended range: Face Skew Angle = 75.270upper limit = 75.000WARNING - Outside of recommended range: Face Vertex Angle = 7.5045lower limit = 15.000WARNING - Outside of recommended range: Edge Angle = 80.740upper limit = 75.000NOTE : other similar error/warning messages were suppressed,use PARAM,CHECKEL,FULL to obtain full reportElement # 2503, element type TETRA.WARNING - Outside of recommended range: Face Skew Angle = 80.714upper limit = 75.000Element # 3764, element type TETRA.WARNING - Outside of recommended range: Aspect Ratio = 819.11upper limit = 100.00ERROR - Acceptable range violation: Face Aspect Ratio = 729.39upper limit = 500.00ERROR - Acceptable range violation: Face Skew Angle = 89.851upper limit = 85.000ERROR - Acceptable range violation: Face Vertex Angle = 0.74365E-01lower limit = 3.0000ERROR - Acceptable range violation: Edge Angle = 89.403upper limit = 87.000Element # 3878, element type TETRA.ERROR - Acceptable range violation: Edge Angle = 87.104upper limit = 87.000Element # 4179, element type TETRA.ERROR - Acceptable range violation: Face Skew Angle = 86.790upper limit = 85.000ERROR - Acceptable range violation: Face Vertex Angle = 1.6382lower limit = 3.0000ERROR - Acceptable range violation: Edge Angle = 88.078upper limit = 87.000Element # 4245, element type TETRA.WARNING - Outside of recommended range: Aspect Ratio = 781.06upper limit = 100.00ERROR - Acceptable range violation: Face Aspect Ratio = 729.39upper limit = 500.00ERROR - Acceptable range violation: Face Skew Angle = 89.851upper limit = 85.000ERROR - Acceptable range violation: Face Vertex Angle = 0.74365E-01lower limit = 3.0000Element # 4435, element type TETRA.WARNING - Outside of recommended range: Face Aspect Ratio = 61.537upper limit = 50.000Element # 4875, element type TETRA.WARNING - Outside of recommended range: Face Aspect Ratio = 53.548upper limit = 50.000Element # 4911, element type TETRA.WARNING - Outside of recommended range: Face Aspect Ratio = 84.289upper limit = 50.000Element # 5261, element type TETRA.WARNING - Outside of recommended range: Aspect Ratio = 104.03upper limit = 100.00*** ERROR # 2203 ***Error(s) encountered during element check***** Element Quality Check Failed - error limits violation *****NOTE : To bypass element quality checks (except essential validity checks)use PARAM,CHECKEL,NO. This may, however, cause very poor results.Element Quality Check Summary-----------------------------Total # of elements that exceeded acceptable range (error) = 22Total # of elements that exceeded recommended range (warning) = 189Acceptable range violations:------------------------------------------------------------------------------Element Property # of Acceptable Range Max. Viol. Elem.Viol. Lower Upper Value type No.------- ------------------- -------- --------- --------- --------- --- -------TETRA Face Skew Angle 20 -- 85.00 89.85 U 3764TETRA Edge Angle 19 -- 87.00 89.75 U 5431TETRA Face Vertex Angle 21 3.00 177.00 0.07 L 4245TETRA Face Aspect Ratio 2 -- 500.00 729.39 U 3764Recommended range violations:------------------------------------------------------------------------------Element Property # of Recommended Range Max. Viol. Elem.Viol. Lower Upper Value type No.------- ------------------- -------- --------- --------- --------- --- -------TETRA TETRA Aspect Ratio 7 -- 100.00 819.11 U 3764TETRA Face Skew Angle 38 -- 75.00 84.49 U 4402TETRA Edge Angle 103 -- 75.00 86.82 U 5036TETRA Face Vertex Angle 172 15.00 165.00 3.35 L 4363TETRA Face Aspect Ratio 12 -- 50.00 117.47 U 5360*** PROGRAM STOPPED: ERRORS DURING ELEMENT QUALITY CHECK.
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Hi,
To solve this, you can either remesh the elements or turn off the element quality check.
To turn off element quality check, Go to Analysis page>> Control Cards>> PARAM>>CHECKEL>> NO
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