This paper is devoted to expand the very promising research undertaken in the author's previous work, basically done on simplified modelling the escort push operation. Now, the other two modes of a tug's employment, as stated in the title, are covered. The special focus is again set on the indirect towing in that the towline force is much higher than the thruster force. The ratio of these two forces, referred to as the relative towing force (or amplification ratio) is evaluated together with the hull drift angle and the thruster(-s) angle for a given escort speed. This mutual relationship is known as the tug performance diagram. Although rather generic (container-type) formulas are derived, they are supplied for exemplification purposes with simple, analytically given hull hydrodynamic forces. The aim is also here to provide a basis for further sensitivity analysis of the model and possible improvement/optimisation to the tug design. The obtained charts also could serve as rough and clear guidance for towmasters while escorting.


    Access

    Download


    Export, share and cite



    Title :

    Steady-state Manoeuvring of a Generic ASD Tug in Escort Pull and Bow-rope Aided Push Operation


    Contributors:


    Publication date :

    2014




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Simulation of Escort Tugs - Manoeuvring Strategy and Training

    McCallum, I. R. / Mardyn, H. R. / Royal Institution of Naval Architects | British Library Conference Proceedings | 1993


    Steady-State Characteristics of the Push-Pull DC-to-DC Converter

    Shoyama, Masahito / Harada, Koosuke | IEEE | 1984


    ROPE PULL FASTENER

    NISHIBAYASHI MASAO | European Patent Office | 2022

    Free access

    Bidirectional push-pull mechanism, bidirectional push-pull table board and bidirectional push-pull storage device

    CUI KEMAN / YE JIANHUI / LI CHONG | European Patent Office | 2023

    Free access

    Pull rope guiding system

    DENG GUANGLU / CHEN XIAOHONG / HUANG JINGFANG | European Patent Office | 2023

    Free access