Analysis of roll motion and stability of a fishing vessel in head seas |
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| Authors: | M A Santos Neves N Prez O Lorca |
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| Institution: | a Federal University of Rio de Janeiro, P.O. Box 68.508, Rio de Janeiro, 21945-970, Brazil;b Austral University, P.O. Box 567, Valdivia, Chile;c Bureau Veritas, Pça. Pio X, 1719 Rio de Janeiro, 20040-020, Brazil |
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| Abstract: | The present paper describes an investigation on the relevance of parametric resonance for a typical fishing vessel in head seas. Results for different Froude numbers are discussed based on experimental, numerical and analytical studies.The first region of resonance is investigated. Distinct wave amplitudes are considered. Some intense resonances are found to occur. The paper compares the experimental results with non-linear time simulations of the roll motion. Very good agreement is found, even when large motions take place.Finally, in order to analyze the experimental/numerical results, analytic consideration is given to distinct parameters affecting the dynamic process of roll amplification. The influence of heave, pitch, wave passage effect, speed and roll restoring characteristics are discussed. |
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| Keywords: | Ship stability Roll motion Parametric resonance |
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