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.

Item Type:	Refereed Article
Keywords:	Mid-WaterArch, Hydrodynamic Loads, Experimental,NumericalAnalysis
Research Division:	Engineering
Research Group:	Maritime engineering
Research Field:	Ocean engineering
Objective Division:	Energy
Objective Group:	Mining and extraction of energy resources
Objective Field:	Oil and gas extraction
UTAS Author:	Hill, J (Mr Jason Hill)
UTAS Author:	Laycock, SC (Mr Samuel Laycock)
UTAS Author:	Chai, S (Professor Shuhong Chai)
UTAS Author:	Balash, C (Dr Cheslav Balash)
ID Code:	90890
Year Published:	2014
Web of Science® Times Cited:	4
Deposited By:	NC Maritime Engineering and Hydrodynamics
Deposited On:	2014-04-30
Last Modified:	2017-11-03
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