Hello everyone, I need some guidance regarding the FEA | Calculate FEA Modes screen. There are three fields to complete: -Number of modes -Maximum iterations -Rigid body offset The first two are self-explanatory, but I'm unsure about the purpose of the rigid body offset. I usually just adjust it randomly, thinking that increasing the number might solve any issues. Can someone explain the function of the rigid body offset? I've noticed that when I input 20Hz, some results are still below 20Hz. Does this impact the discovered modes? Any insights would be greatly appreciated. Thank you! Gerard
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Hey Gerard! The rigid body offset essentially helps to account for any translational and rotational movements of the body that aren't attached to the model, essentially letting you isolate the vibrational modes more accurately. If you're seeing results below the specified frequency, it might indicate that those modes are being incorrectly influenced by mass distribution or boundary conditions. Instead of just cranking up the offset, Iād recommend first checking your mesh quality and constraints as they can have a significant effect on your results. Good luck!
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Answer: - The rigid body offset in FEA mode calculation helps in adjusting the frequency range in which the results are displayed. It allows you to specify a limit below which the calculated modes will not be displayed.
Answer: - Adjusting the rigid body offset can impact the discovered modes by setting a frequency threshold below which certain modes will not be displayed. It helps in refining the results to focus on specific frequency ranges.
Answer: - The rigid body offset frequency serves as a threshold below which modes are not displayed. However, certain factors in the analysis could lead to results appearing below the set frequency. It's essential to understand the impact of other parameters and model characteristics on the results.
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