Abstract
THE problem of calculating the natural frequencies of a dynamical system is of considerable technical importance in many branches of engineering and not least in that branch of engineering called instrument-making. It is important for the designer to be able to predict natural frequencies for two main reasons. First, in order to avoid the occurrence of resonance, that is, agreement of a natural frequency with that of some periodic forcing agency; this is of particular importance in rotating and reciprocating machinery, where persistent resonance in service is dangerous. Secondly, in instruments where response and stimulus should be linearly related over a band of frequencies, approach to resonance cannot be allowed, as this destroys the required characteristic. All this is true of electrical and of electro-mechanical systems as well as of purely mechanical ones.
The Escalator Method in Engineering Vibration Problems
By Joseph Morris. Pp. x + 270. (London: Chapman and Hall, Ltd., 1947.) 21s. net.
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DUNCAN, W. The Prediction of Natural Frequencies of Vibration. Nature 160, 623 (1947). https://doi.org/10.1038/160623a0
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DOI: https://doi.org/10.1038/160623a0