A numerical wave tank is applied to the study of chaotic roll motions of a two-dimensional floating body. This numerical wave tank is constructed by a time-domain, fully nonlinear simulation method based on potential theory. In this simulation method, boundary value problems both on the velocity potential phi and its time derivative partial phi/partial t are solved. The coupling condition between wave and floating body is imposed as the implicit boundary condition of partial phi/partial t on a wet body surface. The radiation condition at the tank ends is satisfied by artificial damping technique. Using this numerical wave tank, the chaotic motions of a 2-D unstable floating body with a small negative GM are simulated in time domain taking fully nonlinear fluid-body interaction into account. The simulated time history, phase plot and Poincare section of roll motions are presented and the dependency of the motion to wave height is discussed.


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    Title :

    Application of fully nonlinear numerical wave tank to the study of chaotic roll motions


    Contributors:
    Tanizawa, K. (author) / Naito, S. (author)


    Publication date :

    1999


    Size :

    7 Seiten, 15 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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