A simple structural power method for determining the vibratory strength of machinery sources

Mogens Ohlrich

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    A new simple characterisation of the vibrational source strength of multi-terminal machinery is formulated in terms of a total terminal source power. This single power spectrum is determined from a summation of pairs of mean square velocities and point mobilities of the machine feet. The method is tested experimentally for two practical source-receiver configurations. The results clearly demonstrate the simplicity of the method and its high potential for engineering evaluation of machinery source strength and for coarse prediction of power transmission to supporting structures. In principle this involves a multitude of interacting source and receiver variables, but from considerations on the randomness of interacting properties it is deduced that the total transmission essentially is controlled by simple relations. This is demonstrated for the two cases and it is revealed that this relation is a constant, frequency independent value, which means that the transmitted power at all frequencies is a constant fraction of the terminal source power spectrum of the machine.
    Original languageEnglish
    Title of host publicationProceedings of
    Place of PublicationMunich
    PublisherTechnische Universität München
    Publication date1998
    Publication statusPublished - 1998
    Event3rd European Conference on Noise Control (Euro-Noise '98) - Munich, Germany
    Duration: 1 Jan 1998 → …
    Conference number: 3


    Conference3rd European Conference on Noise Control (Euro-Noise '98)
    Period01/01/1998 → …

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