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Structural Dynamics

Structural Dynamics

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  3. Why one of the modes is Backward Whirl when animated but seems to have increasing frequency with increasing RPM?

Why one of the modes is Backward Whirl when animated but seems to have increasing frequency with increasing RPM?

Tagged: 2019 R2, General, mechanical, rotordynamics, structural-dynamics, structural-mechanics
    • January 25, 2023 at 7:34 am
      FAQFAQ
      Participant

      Question: One of the mode is Backward Whirl when animated (rotates opposite to applied rotational velocity) but seems to have increasing Frequency with increasing RPM (which is a sign for Forward Whirl). Answer: Because when the higher frequencies lines are crossing in the Campbell chart, user needs to extract more modes to accurately represent this range.

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