Campbell Diagram

This figure shows a Campbell diagram of the fan case and blade vibratory modes. It is for illustrative purposes only and is not to scale. A Campbell diagram is a method of illustrating the natural frequency of an object and its common exciting forces.

The designer uses this information to determine the conditions where a part may be susceptible to high vibrations which can lead to part failure, and to assure that resonance does not occur during steady state operation, particularly at high power.

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