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Real time structural loads monitoring for a large high-speed wave-piercing catamaran using numerical simulation and linear regression

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Almallah, I ORCID: 0000-0003-2398-8691, Lavroff, J ORCID: 0000-0001-5262-8666, Holloway, DS ORCID: 0000-0001-9537-2744, Shabani, B and Davis, MR 2019 , 'Real time structural loads monitoring for a large high-speed wave-piercing catamaran using numerical simulation and linear regression', paper presented at the Pacific International Maritime Conference 2019, 8-10 October 2019, Sydney, Australia.

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Abstract

High-speed wave-piercing catamarans encounter several kinds of global loads; some aresimilar to those for traditional monohull sea going ships, such as longitudinal bendingmoment (LBM), shear, torsional and dynamic wave slamming loads. However, due to thetwin-hull configuration of the catamaran, additional types of global load are introduced, suchas pitch connecting moment (PCM) and transverse bending moment (TBM). This paperinvestigates the structural health monitoring (SHM) of a high-speed wave-piercing catamaranthrough prediction of global loads from real-time processing of signals from a large distributednetwork of strain and acceleration sensors. Finite element method (FEM) and computationalfluid dynamic (CFD) analyses at full scale are deployed to simulate catamaran response toloading cases and sea waves. A transformation equation based on a linear regression of theFEA results is applied to measured signals to convert strain signals to global loads. Global loadsare also estimated using rigid body dynamics alongside computational fluid dynamics (CFD)simulation of HSV2. Motion and strain data collected from sea trials runs of a 98m high-speedwave-piercing catamaran (HSV-2) are used to confirm the proposed method. The sea trialsruns of HSV2 Incat catamaran have been carried out in 2004 in a wide range of sea states,ship speed, wave heights, wave periods and sea wave headings. Longitudinal bendingmoment (LBM) is estimated for headseas run at 20 knots using two methods based on CFDand FEM simulation.

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Almallah, I and Lavroff, J and Holloway, DS and Shabani, B and Davis, MR
Keywords: global wave loads, finite element method (FEM), computational fluid dynamic (CFD), Wave-piercing catamaran, Full-scale, High-speed vessel.
Journal or Publication Title: Proceedings of Pacific International Maritime Conference 2019
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