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Comparison of stopping modes for pod-driven ships by simulation based on model testing

Lookup NU author(s): Professor Michael Woodward, Professor Mehmet Atlar, Dr David Clarke

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Abstract

Conventionally, the stopping of a ship is achieved by direct reversal of propeller rotation. However, the introduction of azimuthing pods presents other options. The following study examines the various modes that may be employed to stop a pod driven ship. A continuous function is derived describing the hydrodynamic forces on both the propeller and pod body for any load condition and helm angle; including fluid damping and added mass effects. The proposed function is validated through comparison with comprehensive open water model tests. Next, a time domain simulation algorithm is proposed to examine the dynamic effects including the mass inertia on both the propeller shaft and slewing stock. Finally, a simulation study for the proposed stopping modes is performed using a known design as case study; results and discussion are presented.

Publication metadata

Author(s): Woodward MD, Atlar M, Clarke D

Publication type: Article

Publication status: Published

Journal: Proceedings of the Institution of Mechanical Engineers Part M: Journal of Engineering for the Maritime Environment

Year: 2005

Volume: 219

Issue: 2

Pages: 47-64

ISSN (print): 1475-0902

ISSN (electronic): 2041-3084

Publisher: Professional Engineering Publishing Ltd.

URL: http://dx.doi.org/10.1243/147509005X10396

DOI: 10.1243/147509005X10396

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