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Slam events of high-speed catamarans in irregular waves

journal contribution
posted on 2023-05-17, 10:16 authored by Giles Thomas, Winkler, S, Michael DavisMichael Davis, Damien HollowayDamien Holloway, Matsubara, S, Jason Ali-LavroffJason Ali-Lavroff, French, B
Slam events experienced by high-speed catamarans in irregular waves were characterised through experiments using a hydroelastic segmented model. The model was designed to represent the dynamic behaviour of the full-scale Incat 112m vessel and to allow the measurement of the slam load on the centrebow and wet deck. It was tested in irregular head seas at two speeds relating to Froude numbers of 0.32 and 0.60. Nearly 300 slams were identified in the test data and analysed with respect to kinematic parameters. Slams were found to have a large range of magnitudes, with the largest equivalent to 1785 tonnes full scale (approximately 70% of vessel displacement); however, the majority of events were of relatively low severity. Difference in slam characteristics were found for the two model speeds tested; slams at the slower speed generally occurred further forward on the hull, prior to the wavecrest and with a bow down pitch angle. Immersion of the centrebow to the two-dimensional filling height of the cross-section between the centrebow and demihulls is shown to be a better indicator of slam occurrance than immersion to the top of the archway.

History

Publication title

Journal of Marine Science and Technology

Volume

16

Pagination

8-21

ISSN

0948-4280

Department/School

Australian Maritime College

Publisher

Springer-Verlag Tokyo

Place of publication

3-3-13, Hongo, Bunkyo-Ku, Tokyo, Japan, 113-0033

Rights statement

Copyright 2010 JASNAOE.

Repository Status

  • Restricted

Socio-economic Objectives

Domestic passenger water transport (e.g. ferries)

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