Evolution of Frequency-Speed Diagram in Rotating Machinery

  • Chong-Won LeeEmail author
Conference paper
Part of the IUTAM Bookseries book series (IUTAMBOOK, volume 1011)


Frequency-speed diagram, often known as Campbell diagram that has long been an important tool in the design and operation of rotating machinery plots most of time the imaginary part of eigenvalues and the incomplete, but useful, frequency information of probable external disturbances, which is known as excitation order lines. Thus, from such diagrams drawn for rotating machines, engineers can understand which modes are likely to be excited by the excitation sources of interest, which speed regions are safe for operation, and so on. In this paper, the pros and cons of the conventional frequency-speed diagram are discussed in relation to the desired rotordynamic properties. And, then is introduced how frequency-speed diagram has been evolved in the past in order to improve the original diagram by adding missing rotordynamic properties.


Frequency-speed diagram Campbell diagram Lee diagram Strong and weak modes Infinity norm of directional frequency response functions 



The author is grateful to Doosan Heavy Industries and Construction Co. Ltd., for the financial support of the research. This work was also supported by the Brain Korea 21 project.


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Center for Noise and Vibration Control, Department of Mechanical EngineeringKAISTDaejeonKorea

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