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A frequency Event should only consists consist of displacement constraints without any loads or moments.
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Step 4: Frequency Constraint
As soon as one Event exists with only displacement constraint constraints exists the frequency constraint can directly be set in the GD Scenario:
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In this case the Frequency Constraint is set to 210 Hz as the target for the first occurring eigenfrequency of the part. Per default the first 10 eigenfrequencies in a range up to 3 times the frequency constraint value are considered. Based on these eigenmodes the part is stiffened to push the the first eigenfrequency upwards.
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To check the final eigenfrequencies of the part, please run a Re-Analysis with MSC Apex structures.
Creation of a Point Mass
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Point Masses play an important role in the calculation of eigenfrequencies. Therefore, Point Masses can directly be created directly in Apex GD.
In this case a Point Mass of 0.1 kg is attached to the same spot (0; 402.50; 25.00) as the remote Forceforce.
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By Per default it is connected with a compliant connector (RBE3). Point Masses are after the creation automatically considered for a frequency optimisation after the creation. They are also considered for static load cases if an acceleration is active. For Frequency Optimisations the connector can also be changed to a rigid one (RBE2) with the Advanced User Settings.
Please have a look at all known limitations!
The complete MSC Apex GD project with all results can be downloaded here:
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