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Publications
Pessoa, J., Fonseca, N., Guedes Soares, C., Boullec, M.L., Ohana, J., Mavrakos, S., Mazarakos, T., Jensen, B. and Kirkegaard, J. (2009), “Experimental Study of the Slowly varying wave Exciting drift forces on a body of Simple Geometry”, Proceeding of the HYDRALAB III Consortium, 2-4. December, Hannover, Germany
The paper presents an experimental investigation of the first and second order wave exciting forces on a vertical cylinder restrained from moving. The objectives are to enhance the understanding of the physics of slowly varying forces and also obtain data for validation of theoretical models. The experimental data includes linear exciting forces, steady drift forces and slowly varying second order forces on monochromatic and bi-chromatic waves. The tests were performed in three different water depths representing shallow and deep waters. The time records are analysed with a least squares method to identify the harmonic content of the forces. It is shown that the second order slowly varying wave drift forces can be identified experimentally with a good consistency.
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