Une analyse numérique des possibilités de résonance d'un bassin portuaire de profondeur variable

Creating, enlarging and excavating a harbour can modify the dynamic response of the basin. A verification of the resonance modes is common practice before undertaking the related work. This can be done numerically if the necessary assumptions are justifiable. It can be done on a small-scale model if the basin has an irregular shape or if the depth varies from one area to the other.A computer-programmed analytical method of resonance modes is presented. It is derived from the direct measure principle of successive oscillation superposition used in the laboratory. Validation is obtained by applying the method to existing theoretical solutions and to the analysis of a small creek of the Gaspe Peninsula where the importance of refraction in the analytical results is demonstrated. Key words: harbour, vibration, agitation, ocean waves, diffraction, refraction, numerical model, application. [Journal translation]

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Experimental Validation of a Numerical Model for Three-Dimensional High-Speed Railway Bridge Analysis by Comparison with a Small-Scale Model

Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing ◽

10.4203/ccp.108.127 ◽

2015 ◽

Cited By ~ 1

Author(s):

J. Sneideris ◽

P. Bucinskas ◽

L. Agapii ◽

L.V. Andersen

Keyword(s):

Numerical Model ◽

High Speed ◽

Experimental Validation ◽

Three Dimensional ◽

Scale Model ◽

Small Scale ◽

Railway Bridge ◽

High Speed Railway ◽

Small Scale Model

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Comparison of Mooring Loads in Survivability Mode on the Wave Dragon Wave Energy Converter Obtained by a Numerical Model and Experimental Data

Volume 7: Ocean Space Utilization; Ocean Renewable Energy ◽

10.1115/omae2012-83415 ◽

2012 ◽

Cited By ~ 1

Author(s):

Stefano Parmeggiani ◽

Made Jaya Muliawan ◽

Zhen Gao ◽

Torgeir Moan ◽

Erik Friis-Madsen

Keyword(s):

Numerical Model ◽

Wave Energy ◽

Complex Geometry ◽

Wave Energy Converter ◽

Scale Model ◽

Coupled Analysis ◽

Small Scale ◽

Energy Converter ◽

Numerical Predictions ◽

Small Scale Model

The Wave Dragon Wave Energy Converter is ready to be up-scaled to commercial size. The design and feasibility analysis of a 1.5 MW pre-commercial unit to be deployed at the DanWEC test center in Hanstholm, Denmark, is currently ongoing. With regard to the mooring system, the design has to be carried out numerically, through coupled analyses of alternative solutions. The present study deals with the preliminary hydrodynamic characterization of Wave Dragon needed in order to calibrate the numerical model to be used for the mooring design. A hydrodynamic analysis of the small scale model in the frequency domain is performed by the software HydroD, which uses WAMIT as core software. The quadratic damping term, accounting for the viscous effect, is determined through an iterative procedure aimed at matching numerical predictions on the mooring tension, derived through time domain coupled analysis, with experimental results derived from tank tests of a small scale model. Due to the complex geometry of the device, a sensitivity analysis is performed to discuss the influence of the mean position on the quality of the numerical predictions. Good correspondence is achieved between the experimental and numerical model. The numerical model is hence considered reliable for future design applications.

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STUDY OF POSITIVE PRESSURE VENTILATION IN ROOM FIRES USING A SMALL-SCALE MODEL

Heat Transfer Research ◽

10.1615/heattransres.2018025564 ◽

2019 ◽

Vol 50 (3) ◽

pp. 243-261

Author(s):

T. Y. Yeung ◽

W. K. Chow

Keyword(s):

Positive Pressure Ventilation ◽

Scale Model ◽

Positive Pressure ◽

Small Scale ◽

Room Fires ◽

Small Scale Model

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Wave Energy Hyperbaric Device for Electricity Production

Volume 5: Ocean Space Utilization; Polar and Arctic Sciences and Technology; The Robert Dean Symposium on Coastal and Ocean Engineering; Special Symposium on Offshore Renewable Energy ◽

10.1115/omae2007-29743 ◽

2007 ◽

Cited By ~ 7

Author(s):

Segen F. Estefen ◽

Paulo Roberto da Costa ◽

Eliab Ricarte ◽

Marcelo M. Pinheiro

Keyword(s):

Power Generation ◽

Wave Energy ◽

Experimental Results ◽

Electricity Production ◽

Scale Model ◽

Small Scale ◽

Regular Waves ◽

Hyperbaric Chamber ◽

Small Scale Model

Wave energy is a renewable and non-polluting source and its use is being studied in different countries. The paper presents an overview on the harnessing of energy from waves and the activities associated with setting up a plant for extracting energy from waves in Port of Pecem, on the coast of Ceara State, Brazil. The technology employed is based on storing water under pressure in a hyperbaric chamber, from which a controlled jet of water drives a standard turbine. The wave resource at the proposed location is presented in terms of statistics data obtained from previous monitoring. The device components are described and small scale model tested under regular waves representatives of the installation region. Based on the experimental results values of prescribed pressures are identified in order to optimize the power generation.

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