University Of Tasmania

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The influence of centre bow length on slamming loads and motions of large wave-piercing catamarans

journal contribution
posted on 2023-05-21, 11:26 authored by Shahraki, JR, Thomas, GA, Michael DavisMichael Davis

The effect of various centre bow lengths on the motions and wave-induced slamming loads on wave-piercing catamarans is investigated. A 2.5 m hydroelastic segmented model was tested with three different centre bow lengths and towed in regular waves in a towing tank. Measurements were made of the model motions, slam loads and vertical bending moments in the model demi-hulls. The model experiments were carried out for a test condition equivalent to a wave height of 2.68 m and a speed of 20 knots at full scale. Bow accelerations and vertical bending moments due to slamming showed significant changes with the change in centre bow, the longest centre bow having the highest wave-induced loads and accelerations. The increased volume of displaced water which is constrained beneath the bow archways is identified as the reason for this increase in the slamming load. In contrast it was found that the length of centre bow has a relatively small effect on the heave and pitch motions in slamming conditions.


Publication title

Royal Institution of Naval Architects. Transactions. Part A. International Journal of Maritime Engineering








Australian Maritime College


Royal Institution of Naval Architects

Place of publication

United Kingdom

Rights statement

©2018, The Royal Institution of Naval Architects.

Repository Status

  • Restricted

Socio-economic Objectives

Marine systems and management not elsewhere classified

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