With the Advanced User Settings the optimisation parameters can be influenced even further than the options Strut Density and Shape Quality. Furthermore, a few unsupported options are available using the Advanced User Settings like Restart, Usage of a Startspace and preventing an Intersectiondisable automatic Non-Design Growth during the optimisation.
The Advanced User Settings can be added to a Scenario by right clicking on this and selecting the option as shown in the picture below.
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To influence the Strut Density even further, changes of the number of iterations, stress goal percentage and number of resolution levels can be made. These settings overwrite the selection of the Strut Densityand the Shape Quality as they are only default settings for the ones described here. The table gives an overview of the default settings:
Input Commands | Explanation |
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UpSampleConfig fOptimizer_switchAddRemove=58 | Starting with iteration 58, elements are either added or removed and only every second iteration is saved. This is important for the iterations near to the end of the optimisation. |
iteration .level_3=20 .level_2=20 .level_1=20 .level_0=4 | Specify how many iterations are calculated at which resolution level. Note that convergence should be achieved at each level. Default settings medium: 20, 20, 20, 4 Default settings sparse: 16, 40, 4, 4 Default settings dense: 10, 10, 40, 4 |
Optimizer_stressPercentGoal .level_3=30 .level_2=40 .level_1=90 .level_0=100 | The percentage at which the target stress is reached is set. Default settings medium: 30, 40, 90, 100 Default settings sparse: 60, 90, 95, 100 Default settings dense: 10, 25, 50, 100 |
The software uses four resolution levels from coarse to fine (level 3: coarse - level 0: fine). More or less resolution levels can be added or removed. The number behind the level indicates the number of iterations calculated on this resolution level. Moreover, the stressPercentGoal for each resolution level can be changed. More information about the stresses and resolution here.
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Therefore, an already optimised STL-file is needed as a Start Space. This can be exported directly from the post processing and be selected as a Start Space by clicking on the browse button. Therefore, the unit of the exported STL-file needs to be in meters (SI-Units). In most cases the Strut Density and Shape Quality settings must be changed as well using the Advanced User Settings. For a restart the same resolution level and number of to be completed iterations have to be filled in. You can find a Tutorial to how to perform a Restart here.
This way a two-stage optimisation is also possible. For a two-stage optimisation the resolution level and number of iterations must be chosen wisely and will need some fine tuning.
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Enable Automatic Non-Design Growth
Per default With the automatic Non-Design growth all Non-Design surfaces grow a little bit beyond their boundaries to ensure a trouble-free and clean intersection. This is done with an automatic detection of Non-Design faces. Sometimes this can lead to issues.
Every time when Machining Allowances are applied on all functional surfaces this function can doesn’t need to be deactivatedactivated. Even if this surface won’t be post processed and no additional material is needed, a Machining Allowance of 0 mm can be applied. This ensures sharp edges and planar, functional surfaces after the intersection.
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This automatic growing can be deactivated activated with the Advanced User Settings command below:
automaticFunctionalFacesDetection.positiveNonDesignDirection= |
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true |
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You might also be interested in these tutorials:
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