The major pieces of machinery on board a ship tend to be mounted on a common platform, which is flexibly mounted on the hull, in order to isolate the machinery vibration from the ship structure and to facilitate their relative alignment. The author describes the use of active control to reduce the level of excitation of the platform structure, subject to a forcing function with a known spatial and temporal distribution. This is achieved in two stages: first, by modifying the dynamics of the platform structure, i.e. its mode shapes and natural frequencies; and second, by introducing damping into these modes. It is assumed that the damping introduced does significantly modify the mode shapes.


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    Title :

    Active isolation of ship machinery platforms


    Additional title:

    Die aktive Isoierung der Plattformen fuer Schiffsmaschinerie


    Contributors:
    Ross, C.F. (author)


    Publication date :

    1988


    Size :

    2 Seiten, 3 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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