Unable to run Solver
Altair EmployeeUpdated by Altair Forum User
Hi, 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.
<?xml version="1.0" encoding="UTF-8"?>
Find more posts tagged with
Sort by:
1 - 5 of
51
Altair EmployeeUpdated by Altair Forum User
Can you please post the '.out' and '.stat' file of your FEM problem?
Altair EmployeeUpdated by Altair Forum User
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.
Altair EmployeeUpdated by Altair Forum User
OPTIMIZATION PROBLEM PARAMETERS :
---------------------------------
Objective Function : Minimize Weighted Compliance
------------------
Response Summary :
------------------
Number of volume fraction responses : 1
Number of compliance responses : 1
Number 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 : 3098
Total # of topology cards : 1
Total Volume of Design Material : 2.1107E+02
Total Mass of Design Material : 5.6988E-04
Volume of Non-Design Material : 0.0000E+00
Mass of Non-Design Material : 0.0000E+00
Solid Design Elements : PSOLID
--------------------- --------
1
---------------------------------
Optimization Parameters Summary :
---------------------------------
Initial Material Fraction [0,1] : 0.5100
Minimum Element Volume Fraction : 0.0100
Discreteness Parameter : 1.0000
Topology Optimization Method : Density Method
Maximum Number of Iterations : 30
Convergence Tolerance : 5.0000E-03
Step Size (Topology) : 0.5000
Checkerboard Control : On (1 - Global Averaging)
Run Type : Topology Optimization
-------------------------------
Topology Optimization Summary :
-------------------------------
-------- ----------- ----------- -----------
DTPL ID Minimum Maximum Minimum
Member Size Member Size Gap Size
-------- ----------- ----------- -----------
1
-------- ----------- ----------- -----------
-------- ------- ------- ----------- ----------- ----------- -----------
DTPL ID Pattern Pattern Draw Dir. Stamping No Hole Extrusion
Repet. Group. Constraints Constraints Constraints Constraints
-------- ------- ------- ----------- ----------- ----------- -----------
1 NONE NONE NONE NONE NONE NONE
-------- ------- ------- ----------- ----------- ----------- -----------
Restart from previous solution : No
Scratch file directory : ./
Free space: 340.359 GB
Number of CPU processors : 1
************************************************************************
************************************************************************
MEMORY ESTIMATION INFORMATION :
-------------------------------
Solver Type is: Sparse-Matrix Solver
Direct Method
Current Memory (RAM) : 100 MB
In addition a ramdisk area was allocated in memory : 200 MB
Estimated Minimum Memory (RAM) for Out of Core Solution : 6 MB
Recommended Memory (RAM) for Out of Core Solution : 6 MB
Recommended 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 MB
Estimated Scratch Disk Space for In-Core Solution : 5 MB
Estimated Scratch Disk Space for Out of Core Solution : 8 MB
************************************************************************
BEGINNING OPTIMIZATION SOLUTION ....
************************************************************************
OPTIMIZATION HISTORY INFORMATION :
----------------------------------
ITERATION 0
Element # 2354, element type TETRA.
WARNING - Outside of recommended range: Face Skew Angle = 75.270
upper limit = 75.000
WARNING - Outside of recommended range: Face Vertex Angle = 7.5045
lower limit = 15.000
WARNING - Outside of recommended range: Edge Angle = 80.092
upper limit = 75.000
Element # 2376, element type TETRA.
WARNING - Outside of recommended range: Face Vertex Angle = 13.291
lower limit = 15.000
WARNING - Outside of recommended range: Edge Angle = 75.141
upper limit = 75.000
Element # 2399, element type TETRA.
WARNING - Outside of recommended range: Face Skew Angle = 75.270
upper limit = 75.000
WARNING - Outside of recommended range: Face Vertex Angle = 7.5045
lower limit = 15.000
WARNING - Outside of recommended range: Edge Angle = 80.740
upper limit = 75.000
NOTE : other similar error/warning messages were suppressed,
use PARAM,CHECKEL,FULL to obtain full report
Element # 2503, element type TETRA.
WARNING - Outside of recommended range: Face Skew Angle = 80.714
upper limit = 75.000
Element # 3764, element type TETRA.
WARNING - Outside of recommended range: Aspect Ratio = 819.11
upper limit = 100.00
ERROR - Acceptable range violation: Face Aspect Ratio = 729.39
upper limit = 500.00
ERROR - Acceptable range violation: Face Skew Angle = 89.851
upper limit = 85.000
ERROR - Acceptable range violation: Face Vertex Angle = 0.74365E-01
lower limit = 3.0000
ERROR - Acceptable range violation: Edge Angle = 89.403
upper limit = 87.000
Element # 3878, element type TETRA.
ERROR - Acceptable range violation: Edge Angle = 87.104
upper limit = 87.000
Element # 4179, element type TETRA.
ERROR - Acceptable range violation: Face Skew Angle = 86.790
upper limit = 85.000
ERROR - Acceptable range violation: Face Vertex Angle = 1.6382
lower limit = 3.0000
ERROR - Acceptable range violation: Edge Angle = 88.078
upper limit = 87.000
Element # 4245, element type TETRA.
WARNING - Outside of recommended range: Aspect Ratio = 781.06
upper limit = 100.00
ERROR - Acceptable range violation: Face Aspect Ratio = 729.39
upper limit = 500.00
ERROR - Acceptable range violation: Face Skew Angle = 89.851
upper limit = 85.000
ERROR - Acceptable range violation: Face Vertex Angle = 0.74365E-01
lower limit = 3.0000
Element # 4435, element type TETRA.
WARNING - Outside of recommended range: Face Aspect Ratio = 61.537
upper limit = 50.000
Element # 4875, element type TETRA.
WARNING - Outside of recommended range: Face Aspect Ratio = 53.548
upper limit = 50.000
Element # 4911, element type TETRA.
WARNING - Outside of recommended range: Face Aspect Ratio = 84.289
upper limit = 50.000
Element # 5261, element type TETRA.
WARNING - Outside of recommended range: Aspect Ratio = 104.03
upper 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) = 22
Total # of elements that exceeded recommended range (warning) = 189
Acceptable 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 3764
TETRA Edge Angle 19 -- 87.00 89.75 U 5431
TETRA Face Vertex Angle 21 3.00 177.00 0.07 L 4245
TETRA Face Aspect Ratio 2 -- 500.00 729.39 U 3764
Recommended 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 3764
TETRA Face Skew Angle 38 -- 75.00 84.49 U 4402
TETRA Edge Angle 103 -- 75.00 86.82 U 5036
TETRA Face Vertex Angle 172 15.00 165.00 3.35 L 4363
TETRA Face Aspect Ratio 12 -- 50.00 117.47 U 5360
*** PROGRAM STOPPED: ERRORS DURING ELEMENT QUALITY CHECK.
Altair EmployeeUpdated by Altair Forum User
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
Here is a better picture
<?xml version="1.0" encoding="UTF-8"?>