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Fluid-structure interaction simulation of slam-induced bending in large high-speed wave-piercing catamarans

McVicar, J; Lavroff, J; Davis, MR; Thomas, GA; (2018) Fluid-structure interaction simulation of slam-induced bending in large high-speed wave-piercing catamarans. Journal of Fluids and Structures , 82 pp. 35-58. 10.1016/j.jfluidstructs.2018.06.009. Green open access

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Abstract

A ship in waves may experience a water impact event known as a slam. In this paper, slam-induced bending of wave-piercing catamarans in head seas is predicted by way of fluid–structure interaction simulations. The flow field during slamming of a wave-piercing catamaran is highly non-linear and cannot be accurately captured using potential flow methods as a result of the interactions between the flow fields produced by water entry of the separate demihulls and centre bow. Thus, the Reynolds-Averaged Navier–Stokes (RANS) equations are solved for rigid body motion of a vessel at model-scale. Verification and validation is conducted using model-scale data from a Hydroelastic Segmented Model (HSM). One-way and two-way interactions are computed considering vibration of the hull girder. In the case of one-way interactions, the computed fluid loads affect the structure, but the structural response does not affect the fluid domain solution whereas for the two-way interactions the structural response affects the fluid solution. A new method for capturing the non-linear time variation in added mass is developed and deemed necessary when computing one-way interactions, primarily as a result of the large changes in forward wetted area present for a wave-piercing catamaran. It is shown that two-way interaction simulation is not needed for predicting the slam induced hull girder loads. One-way interaction simulation can therefore be used allowing reduced computational effort.

Type: Article
Title: Fluid-structure interaction simulation of slam-induced bending in large high-speed wave-piercing catamarans
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jfluidstructs.2018.06.009
Publisher version: https://doi.org/10.1016/j.jfluidstructs.2018.06.00...
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Slamming, Whipping, Fluid–structure interaction, Hydroelasticity, Catamaran, Wave-piercing
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/10051680
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