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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.
Advanced User Settings Commands for a Restart with Start Space:
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schedule.startCandidate.candidate=<restart-file.stl>
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Specifies the Restart/Start Space file.
Please enter the file name for <restart-file.stl>
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.
A Start Space can be marked as a Non-Design Space, thus the Start Space cannot be removed during the optimisation and will be part of the final design. Therefore, the following command need to be added as well:
geometry.StartCandidate.path = StartCandidate.stl |
Activate Automatic Non-Design Growth
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This governs how far the optimization value of two symmetric elements is allowed to differ while still being considered equivalent. In theory any value works: the higher the value the more zealously the algorithm will try to keep Soft Symmetry, possibly degrading the quality of the produced geometry compared to a non-symmetric one. The default value is 1e-64.
Attempt Soft Symmetry:
Whether or not Soft Symmetry is attempted at all can be (de)activated here.
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configuration.equivalenceDelta = 1e-64 configuration.attemptSoftSymmetry = dynamic configuration.softSymmetryThreshold = 0 |
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