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Effect of material design parameters on the forced vibration response of composite hydrofoils in air and in water


Phillips, AW and Cairns, R and Davis, C and Norman, P and Brandner, PA and Pearce, BW and Young, Y, Effect of material design parameters on the forced vibration response of composite hydrofoils in air and in water, Proceedings of the Fifth International Symposium on Marine Propulsors, 12-15 June, 2017, Helsinki, Finland, pp. 813-822. ISBN 978-951-38-8608-0 (2017) [Refereed Conference Paper]

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Copyright 2017 SMP chair committee

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The ability to tailor the properties of structures made from composite materials gives designers new ways to improve their functionality. For example, the layup of a composite can be designed in such a way that elastic (e.g. bendtwist) couplings advantageously control how the shape and vibration characteristics of the structure changes under load. This ability to tailor composite materials is increasingly being used in marine propeller applications to improve their performance and control their vibration characteristics. However, designers face additional challenges when using these materials. The density of composites approaches that of water so fluid inertial effects become equal to or even greater than solid inertial effects. Moreover, the increased compliance of adaptive composite structures means that they can no longer be considered as approximately rigid, and flow-induced vibrations may develop. This means that load-dependent fluid-structure interaction effects must be understood to enable design optimisation and to avoid unwanted hydroelastic instabilities during operation. In this paper, the forced vibration behaviour of composite hydrofoils designed to have different bending stiffness and bendtwist coupling behaviour were experimentally measured in air and in water tests. Arrays of fibre Bragg gratings (FBG) bonded to the surface of the hydrofoils recorded their dynamic strain response. The effect of added mass on the hydrofoils vibration behaviour is discussed.

Item Details

Item Type:Refereed Conference Paper
Keywords:composite hydrofoil, vibration response, damping, dynamic strain response
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ship and platform structures (incl. maritime hydrodynamics)
Objective Division:Manufacturing
Objective Group:Transport equipment
Objective Field:Nautical equipment
UTAS Author:Brandner, PA (Professor Paul Brandner)
UTAS Author:Pearce, BW (Dr Bryce Pearce)
ID Code:117854
Year Published:2017
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2017-06-28
Last Modified:2018-04-19

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