Book ChapterDOI
An Investigation on Head-Sea Parametric Rolling for Two Fishing Vessels
Marcelo A. S. Neves,Nelson A. Perez,Osvaldo M. Lorca,Claudio A. Rodríguez +3 more
- pp 231-252
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TLDR
In this paper, an experimental and numerical investigation on the relevance of parametric resonance for two typical fishing vessels in head seas was carried out, aimed at assessing the influence of the incorporation of a transom stern to the design.Abstract:
The paper describes an experimental and numerical investigation on the relevance of parametric resonance for two typical fishing vessels in head seas. The investigation is aimed at assessing the influence of the incorporation of a transom stern to the design. Results for different Froude numbers are discussed. The first region of resonance is investigated. Distinct metacentric heights and wave amplitudes are considered. Quite intense resonances are found to occur. These are associated with specific values of metacentric height, ship speed and stern shape. In order to analyse the experimental/numerical results, analytic consideration is given to distinct parameters affecting the dynamic process of roll amplification. The influences of heave, pitch, wave passage effect, speed and roll restoring characteristics are discussed.read more
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Book ChapterDOI
Prediction of Parametric Rolling in Irregular Head Waves
Hirotada Hashimoto,Naoya Umeda +1 more
TL;DR: In this paper, a 3DOF (degrees of freedom) numerical model based on the nonlinear strip theory is developed for the prediction of large amplitude of parametric roll both in regular and irregular head waves.
References
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An investigation of head-sea parametric rolling and its influence on container lashing systems
TL;DR: In this paper, a post-Panamax C11 class containership encountered extreme weather and sustained extensive loss and damage to deck stowed containers, and the motions of the vessel during this storm event were investigated through a series of model tests and numerical analyses that confirmed the vessel's parametric rolling response in head seas at the time of the casualty.
Journal ArticleDOI
An Investigation of Head-Sea Parametric Rolling and its Influence on Container Lashing Systems
TL;DR: In this paper, a post-Panamax, C11 class containership encountered extreme weather and sustained extensive loss and damage to deck stowed containers during a storm event, and the motions of the vessel during this storm event were investigated through a series of model tests and numerical analyses.
Journal ArticleDOI
On unstable ship motions resulting from strong non-linear coupling
TL;DR: In this paper, a third-order mathematical model is introduced, aimed at describing strong parametric excitation associated with cyclic changes of the ship restoring characteristics, and a derivative model is employed to describe the coupled restoring actions up to third order.
Journal ArticleDOI
Stability of small fishing vessels in longitudinal waves
TL;DR: In this article, the influence of stern shape on the parametric stability of fishing vessels is studied, both analytically and experimentally, and the analytical method takes into consideration the effects of the heave and pitch motions and wave passage and shows good agreement with experimental results.