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High-speed wave-piercing catamaran global loads determined by FEA and sea trials

Citation

Almallah, I and Lavroff, J and Holloway, DS and Davis, MR, High-speed wave-piercing catamaran global loads determined by FEA and sea trials, Transactions of the Royal Institution of Naval Architects Part A: International Journal of Maritime Engineering, 161, (A2) pp. 139-154. ISSN 1479-8751 (2019) [Refereed Article]


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Copyright Statement

Copyright 2019 The Royal Institution of Naval Architects

Official URL: https://www.rina.org.uk/ijme.html

DOI: doi:10.3940/rina.ijme.2019.a2.522

Abstract

Wave-piercing catamaran hull forms are widely used for high-speed ferry applications due to the hull slenderness, suitable for achieving high speeds. The global loads acting on these craft are of great interest as there is limited knowledge on determining the magnitude of the loads, in particular when operating in random sea conditions. Longitudinal and transverse bending moments as well as pitch connecting moments and hull torsion loads act on the hull simultaneously. This paper investigates the estimation of these global loads from full-scale catamaran sea trials strain gauge data using finite element methods. Det Norske Veritas (DNV) load cases are applied to a finite element model in order to determine the conversion between local strain values observed during sea trials and prevailing global loads. Comparisons are thus made of global loads determined from strain data collected from sea trials with DNV global load cases. The results show that this method is relatively reliable for the prediction of hull global loads in the absence of slamming. Comparisons have been made for different heading angles. The quasi-static design loads are important during the ship design stage, as they are good proxies in wavelengths comparable to the hull length for rationally determined loads obtained from a first-principles dynamic analysis. The broad aims here are to demonstrate the use of strain sensor data obtained during sea trials for determination of global sea loads, to reconcile the loads thus determined with DNV load cases and thereby to improve the accuracy of the predicted loads used in design to increase the structural efficiency of vessel design.

Item Details

Item Type:Refereed Article
Keywords:global loads, wave-piercing catamaran, finite element analysis, sea trials, high speed,passenger, slamming, DNV rules
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ship and Platform Hydrodynamics
Objective Division:Transport
Objective Group:Water Transport
Objective Field:Passenger Water Transport
UTAS Author:Almallah, I (Mr Islam Almallah)
UTAS Author:Lavroff, J (Dr Jason Lavroff)
UTAS Author:Holloway, DS (Dr Damien Holloway)
UTAS Author:Davis, MR (Professor Michael Davis)
ID Code:132739
Year Published:2019
Deposited By:Engineering
Deposited On:2019-05-18
Last Modified:2019-06-12
Downloads:0

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