This paper deals with the coupled effect between a fore-and-aft vibration of superstructure and a vertical vibration of ship's hull. Characteristics of the coupled vibration were discussed by using the simple model, namely, one beam and mass-spring model. Main conclusion are as follows: Coupled effect depends on four parameters. One is position of superstructure. Second is a ratio of distance between fore and aft wall of superstructure to ship's hull length. Third is a mass ratio of superstructure to ship's hull. The last is an uncoupled natural frequency ratio. Natural frequencies of the coupled vibration obey the law of so-called 'spring-off'. But the law of 'spring-off' for vertical vibration is rather complicated compared with that for longitudinal vibration. When uncoupled natural frequencies coincide with each other, coupled ones spring off in the larges amount. (Wassmann)


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    Title :

    Coupled vibration of fore and aft vibration of superstructure and vertical hull vibration


    Additional title:

    Gekoppelte Schwingung der Vorder- und Hinterschwingung des Aufbaus und vertikale Rumpfschwingung


    Contributors:
    Matsumoto, K. (author) / Arima, K. (author)


    Publication date :

    1980


    Size :

    8 Seiten, 9 Bilder, 2 Tabellen, 3 Quellen


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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