Optimizing steady and dynamic hydroelastic performance of composite foils with low-order models

Ng, Galen W.; Martins, Joaquim R. R. A.; Young, Yin Lu

doi:10.1016/j.compstruct.2022.116101

Cited by 5 publications

(4 citation statements)

References 36 publications

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“…This may be explained through geometrical spreading and damping effects. Interesting exceptions to this are at sources B, C and E. Here sensors along the leading edge (4,6) have relatively large values compared to sensors deeper in the blade (11,14). This is expected to be due to the lower stiffness at the edges of the blade, which can locally magnify the amplitude.…”

Section: Drop In Amplitude Spectra Along the Bladementioning

confidence: 96%

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Acoustic emission monitoring of composite marine propellers in submerged conditions using embedded piezoelectric sensors

Huijer,

Kassapoglou,

Pahlavan

2024

Smart Mater. Struct.

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Flexible composite marine propellers can aid the marine industry in reducing carbon emissions and underwater radiated noise pollution. The structural integrity of the blades can be assessed using structural health monitoring. One of these methods is the measurement and analysis of damage-induced acoustic emission signals. This paper experimentally investigates the feasibility of using embedded piezoelectric sensors for the measurement of acoustic emissions throughout a submerged flexible composite marine propeller blade. A full-scale glass-fibre reinforced polymer blade has been manufactured with 24 embedded sensors. While suspended in artificial seawater, acoustic emissions were simulated on the blade. The measurements show that the embedded piezoelectric sensors can measure acoustic emissions while the blade is submerged. Further, the distance from source to sensor over which the acoustic emission is measurable was investigated. For a noise level of 40dB and a source amplitude of 70dB between 100-250kHz, an average maximum measurable distance of 124mm was obtained. For higher frequencies, the distance drops and for lower noise levels the distance increases.

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Section: Drop In Amplitude Spectra Along the Bladementioning

confidence: 96%

“…obtaining these reductions. The directed flexibility of such propellers enables the blade shape to be adaptable to different loading conditions [3,4]. This can improve efficiency [5].…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission monitoring of composite marine propellers in submerged conditions using embedded piezoelectric sensors

Huijer,

Kassapoglou,

Pahlavan

2024

Smart Mater. Struct.

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“…It is common to use a Finite Element Model (FEM) to solve the solid problem. The complexity of the models varies from simple beam elements [1,3,5,7,[9][10][11][12] to the more complex shell [6][7][8][9] and solid elements [2] and in some cases even considering anisotropic material properties. The fluid flow problem can also be solved with varying degrees of complexity from lifting line method [3,12] to unsteady Reynolds Average Navier-Stokes (RANS) Finite Volume Methods (FVM) [6].…”

Section: State Of the Artmentioning

confidence: 99%

“…Modern hydrofoils are thin to reduce drag and the tin structure results in large deformations during sailing and therefore Fluid Structure Interaction (FSI) are important. In recent years much work has been published on FSI of foils, see for example [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Fluid Structure Interaction of NACRA 17 Foil

Knudsen,

Marimon Giovannetti,

Legarth

et al. 2024

JMSE

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The NACRA 17 is a small foiling catamaran that is lifted out of the water by two asymmetric z-foils and two rudder elevators. This paper investigates how foil deflection affects not only foil performance but overall boat behaviour using a numerical Fluid Structure Interaction (FSI) model. The deformations are solved with a solid model based on the Finite Element Method (FEM) and the flow is solved with a Reynolds Average Navier-Stokes (RANS) based Finite Volume Model (FVM). The models are strongly coupled to allow dynamic FSI simulations. The numerical model is validated by comparing it to an experimental campaign conducted at the RISE SSPA Maritime Center in Sweden.Validation shows reasonable agreement, but the model can only be considered validated for some rake angles. The large deformation of the foils is found to have a profound effect on the performance of the foils and therefore of the overall catamaran. Turbulence transition and boat speed are found to affect foil forces and, in turn, deformation. Dynamic response of the foils during boat motion as exposed to waves is investigated and finally the full boat hydrodynamic is simulated by including both foils and the rudders in various scenarios.

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Dynamic hydroelasticity of composite appendages with reverse-mode algorithmic differentiation

Ng,

Jonsson,

et al. 2024

Composite Structures

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Optimizing steady and dynamic hydroelastic performance of composite foils with low-order models

Cited by 5 publications

References 36 publications

Acoustic emission monitoring of composite marine propellers in submerged conditions using embedded piezoelectric sensors

Acoustic emission monitoring of composite marine propellers in submerged conditions using embedded piezoelectric sensors

Dynamic Fluid Structure Interaction of NACRA 17 Foil

Dynamic hydroelasticity of composite appendages with reverse-mode algorithmic differentiation

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