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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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one publication added to basket [337136]
Effects of water depth and speed on ship motion control from medium deep to very shallow water Chen, C.; Delefortrie, G.; Lataire, E. (2021). Effects of water depth and speed on ship motion control from medium deep to very shallow water. Ocean Eng. 231: 109102. https://hdl.handle.net/10.1016/j.oceaneng.2021.109102 In: Ocean Engineering. Pergamon: Elmsford. ISSN 0029-8018; e-ISSN 1873-5258, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 377384 [ aanvragen ] Waterbouwkundig Laboratorium: Non-open access 361007 [ aanvragen ]

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Trefwoorden

Harbours and waterways > Manoeuvring behaviour > Open water Numerical calculations Physical modelling Zoet water

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Auteurs		Top
Chen, C., meer Delefortrie, G., meer Lataire, E., meer

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Abstract

To extend the knowledge on ship manoeuvring and predict ship’s behaviour accurately from medium deep to very shallow water, this paper comprehensively investigates water depth and speed effects on ship’s manoeuvrability, steering model and motion control through experimental studies. Free running model tests at four water depths and six speeds were conducted using a scaled ship model in the towing tank at Flanders Hydraulics Research (FHR). The influence of under keel clearance and speed on the acceleration tests and zigzag manoeuvres were firstly analysed. Secondly, the shallow water effect on ship steering model was discussed via theoretical analysis and experimental validation. Then, the investigation of the effects of speed and under keel clearance on the ship motion controller’s parameters and performance was executed, and a novel adaptive controller was proposed. To improve controller’s performance in shallow water, a scheme was proposed to optimize its parameters. The results indicate that both speed and water depth have considerable influence on ship’s manoeuvrability and controllability. Especially, water depth restrictions change the hydrodynamic forces, reduce the propulsion efficiency and manoeuvreability, the ship becomes more difficult to manoeuvre and control in shallow water. These impacts on ship manoeuvring, modelling and motion control cannot be neglected.

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