Stability assessment of tugs in escort operations using a time domain simulation

Dynamic behaviour after impact loads

Master thesis (2019)

Authors

R.M. Marijnissen Mechanical Engineering

Contributors

H.J. de Koning Gans Ship Hydromechanics and Structures - Mechanical, Maritime and Materials Engineering (supervisor 1)
Siebe Rooijakkers Damen Shipyards (supervisor 1)
P.R. Wellens Ship Hydromechanics and Structures - Mechanical, Maritime and Materials Engineering (supervisor 2)
A. Vrijdag Ship Design, Production and Operations - Mechanical, Maritime and Materials Engineering (supervisor 2)
Niek Teeuwen (supervisor 2)
Faculty
Mechanical Engineering
Copyright: © 2019 Renske Marijnissen
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Published Date

13-11-2019

Language

English

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Faculty

Mechanical Engineering

Abstract

Over the past years tugs are evolving to more compact designs equipped with large power installations. This inherently increases the risk of accidents, demanding a more reliable prediction of the tug’s dynamical behaviour in critical situations. To capture the dynamic behaviour of a tug, a time domain simulation tool has been developed and used to evaluate the tug’s safety in those critical situations. Multiple methods derived from recent studies are combined and used to establish a reliable description of the involved hydrodynamic forces and moments. Besides a sensitivity study is performed to investigate the impact of inaccurate approximations of those forces and moments. Furthermore, the sensitivity to a change in more design and operation related parameters has been investigated. Finally, the research includes a step by step validation and an evaluation of the current regulations.