The eigenfrequencies of a part play an important role in the process of creating a new design. The eigenfrequency optimisation is added as an new function in this release. The option can be activated for a separate event and therefore additionally to static load cases.
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If you want to run the optimisation also via the command line or remotely you need the to set up the following environment variable
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As an optional input the range and the number of frequencies which are taken into account for the optimisation can be modified with the Advanced User Settings.
Post Processing
The calculated first eigenfrequency over the iterations can be observed with a chart in the Post Processing. The frequency Event does not create any visible plots for the Failure Criterion or Stress on the geometry. But the influence of the frequency Event can be observed with the optimization achievement index which shows where material will be added (>0) to increase the first eigenfrequency of the part.
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Point Masses
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It has been found observed that comparable heavy point masses can cause that the optimisation does not achieve the Frequency Constraint. To address this, the impact value can be set up to a value greater than 1. This can be done with the following Advanced User Settings command: |
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RBE2 can be used as a connection type, but the RBE2 connection won’t be considered in a static load case. This can occur if a Point Mass is added in combination with acceleration. |
connector.pm_PointMassInertia_Point_Mass_1.type=RBE2 |
You might also be interested in this tutorial:
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