The Advanced User Settings give the possibility to (re-)start an optimisation with a Start Space. With this option already optimised results can be modified, e.g. struts can be added or removed, and this new geometry can be used as the starting point of another optimisation. With this Two-Stage-Optimisation already optimised geometries can be highly influenced and steered in the desired direction.
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In the last step the optimisation can be (re-)started with the new, modified Start Space. Therefore, the previous Scenario can be copied.
For the copied Scenario the Advanced User Settings have to be set-up. These are used to adjust the number of iterations for each Resolution Level. In most of the cases a Two-Stage-Optimisation should start directly on the highest Resolution Level or at least on the last two Resolution Levels.
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schedule.level.0.iterationCount = 0
schedule.level.1.iterationCount = 0
schedule.level.2.iterationCount = 0
schedule.level.3.iterationCount = 0
schedule.level.3.4.iterationCount = 2
schedule.level.5.iterationCount = 36
Also, the path to the modified Start Space has to be selected in the respectable field.
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The optimisation starts with the modified geometry as the first iteration. At the end of the optimisation the strut is removed and the rest of the structure completely integrated into the design. The algorithm might increase material elsewhere to compensate for the loss of the strut.
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You can check the status of the optimisation in the GD Status and get more information on Warning and Error messages. This can be done directly in the Post-Processing as well as in the Studies tab for an optimisation that has already run.
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