Publicações

Pessoa, J., Fonseca, N., Rajendran, S. e Guedes Soares, C. (2011), “Investigation of the Hydrodynamic Characteristics of Assymetric Cross-Sections Advancing in Regular Waves”, Proceedings of the 30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2011), 19-24 Junho, Roterdão, Holanda, ASME, New York, USA, paper OMAE2011-50318

The paper presents an experimental investigation of the first order and second order wave exciting forces acting on a body of simple geometry subjected to long crested irregular waves. The body is axis-symmetric about the vertical axis, like a vertical cylinder with a rounded bottom, and it is restrained from moving. Second order spectral analysis is applied to obtain the linear spectra, coherence spectra and cross bi-spectra of both the incident wave elevation and of the horizontal and vertical wave exciting forces. Then the linear and quadratic transfer functions (QTF) of the exciting forces are obtained. The QTF obtained from the analysis of irregular wave measurements are compared with results from experiments in bi-chromatic waves and with numerical predictions from a second order potential flow code.

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