The authors developed a continuous linear-elastic one-dimensional analytic model that should accurately represent a vertically tethered system subject to surface excitation. The model accurately predicts: (a) the transfer function between the motion of the ship and cage, (b) the transfer function between ship motion and tension in the tether and (c) the natural frequency and its harmonics of the remotely operated platform for oceanographic science (ROPOS) deepsea ROV (remotely operated vehicle) system for dephts between 0 m and 1765 m up to moderately rough sea conditions. By solving the ship-cage motion transfer function for the onset of zero tension in the tether, it is able to predict the amplitude of ship motion that triggers a snap load. The solution to the model requires only two non-dimensional parameters representing the mass ratio of the cage and tether and the force ratio of drag to tension. The predicted transfer function and natural frequency are not excessively sensitive to the value of these parameters for the ROPOS ROV system.


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    Title :

    The motion of a deep-sea remotely operated vehicle system,. Part 2: Analytical model


    Additional title:

    Die Kinematik eines ferngesteuerten Tiefseefahrzeugs. Teil 2: analytische Modelluntersuchung


    Contributors:
    Driscoll, F.R. (author) / Lueck, R.G. (author) / Nahon, M. (author)

    Published in:

    Ocean Engineering ; 27 , 1 ; 57-76


    Publication date :

    2000


    Size :

    20 Seiten, 9 Bilder, 2 Tabellen, 9 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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