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Hydrodynamic loads and response of a Mid Water Arch structure

journal contribution
posted on 2023-05-18, 00:08 authored by Hill, J, Laycock, SC, Shuhong ChaiShuhong Chai, Balash, C, Morand, H
A Mid Water Arch (MWA) is a subsea structure used in flexible riser and umbilical systems. Understanding the hydrodynamic properties and response of the MWA to environmental conditions is important in the design of such systems. In this study, these areas have been investigated through both experimental model scale testing and numerical simulations. To carry out the model scale testing it was necessary to develop two experimental methods; captured testing to determine the drag forces on the structure, and tethered testing to enable the offsets, rotations and tether tension loads to be resolved. The numerical simulations are comprised of Computational Fluid Dynamics (CFD) with ANSYS CFX to explore the drag forces on the MWA, hydrodynamic diffraction analyses with ANSYS AQWA to find the added mass of the MWA, and dynamic analyses with OrcaFlex to study the offsets and rotations of the MWA in the tethered arrangement. The model testing results were used for comparison and validation of the numerical simulations; namely, the captured testing and CFD studies, and the tethered testing and OrcaFlex analyses. The findings from this study have shown the significance of experimental testing for the purpose of investigating the hydrodynamic loads on a MWA structure.

History

Publication title

Ocean Engineering: An International Journal of Research and Development

Volume

83

Pagination

76-86

ISSN

0029-8018

Department/School

Australian Maritime College

Publisher

Pergamon-Elsevier Science Ltd

Place of publication

The Boulevard, Langford Lane, Kidlington, Oxford, England, Ox5 1Gb

Rights statement

Copyright 2014 Elsevier Ltd.

Repository Status

  • Restricted

Socio-economic Objectives

Oil and gas extraction

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