Predicting the motions of high speed RIBs: a comparison of non-linear strip theory with experiments
Predicting the motions of high speed RIBs: a comparison of non-linear strip theory with experiments
Accurate prediction of the motions of high speed craft is an essential element in understanding the response of crew to a particular design configuration. The aim of this work is to evaluate the capability of a numerical method for use in the context of a procedure for designing high speed craft. A numerical model is used to predict the motions of a planing craft in both regular and irregular waves. The model is based on non-linear strip theory, through calculation of the forces occurring on wedge impact. This numerical model and its limitations are well understood for lower planing speeds (up to a length based Froude number of around 1.2). This paper investigates the limitations and accuracy for higher speed craft (Froude number around 3). At present there is an inadequate knowledge of the model performance at these speeds.
Lower speed validation is carried out using results from published experiments although this data does not extend to the higher speeds. Validation of the model at higher speeds is achieved using experimental data attained from testing two scale models: A wave piercing rigid inflatable boat (RIB) and an Atlantic 21 RIB. The experiments are conducted in a range of regular wave frequencies for three wave height together with a realistic JONSWAP sea spectrum. Results are promising, with good correlation between the heave motion of the numerical model and the measured experimental data. Based on these results, a number of potential enhancements to the existing numerical model are discussed.
210-224
WEGEMT: Royal Institution of Naval Architects
Lewis, S.G.
68605959-735b-4e84-9fb2-7f0bff6beddb
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Blake, J.I.R.
6afa420d-0936-4acc-861b-36885406c891
Shenoi, R.A.
a37b4e0a-06f1-425f-966d-71e6fa299960
2006
Lewis, S.G.
68605959-735b-4e84-9fb2-7f0bff6beddb
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Blake, J.I.R.
6afa420d-0936-4acc-861b-36885406c891
Shenoi, R.A.
a37b4e0a-06f1-425f-966d-71e6fa299960
Lewis, S.G., Hudson, D.A., Turnock, S.R., Blake, J.I.R. and Shenoi, R.A.
(2006)
Predicting the motions of high speed RIBs: a comparison of non-linear strip theory with experiments.
In Proceedings of the 5th International Conference on High Performance Marine Vehicles (HIPER '06).
WEGEMT: Royal Institution of Naval Architects.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Accurate prediction of the motions of high speed craft is an essential element in understanding the response of crew to a particular design configuration. The aim of this work is to evaluate the capability of a numerical method for use in the context of a procedure for designing high speed craft. A numerical model is used to predict the motions of a planing craft in both regular and irregular waves. The model is based on non-linear strip theory, through calculation of the forces occurring on wedge impact. This numerical model and its limitations are well understood for lower planing speeds (up to a length based Froude number of around 1.2). This paper investigates the limitations and accuracy for higher speed craft (Froude number around 3). At present there is an inadequate knowledge of the model performance at these speeds.
Lower speed validation is carried out using results from published experiments although this data does not extend to the higher speeds. Validation of the model at higher speeds is achieved using experimental data attained from testing two scale models: A wave piercing rigid inflatable boat (RIB) and an Atlantic 21 RIB. The experiments are conducted in a range of regular wave frequencies for three wave height together with a realistic JONSWAP sea spectrum. Results are promising, with good correlation between the heave motion of the numerical model and the measured experimental data. Based on these results, a number of potential enhancements to the existing numerical model are discussed.
This record has no associated files available for download.
More information
Published date: 2006
Venue - Dates:
5th International Conference on High Performance Marine Vehicles (HIPER '06), Launceston, Australia, 2006-11-08 - 2006-11-10
Organisations:
Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 42352
URI: http://eprints.soton.ac.uk/id/eprint/42352
PURE UUID: 975ac8cd-0972-4948-9531-7455a7ee51ba
Catalogue record
Date deposited: 11 Dec 2006
Last modified: 12 Dec 2021 03:01
Export record
Contributors
Author:
S.G. Lewis
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
