On-board monitoring and estimation of lateral accelerations through extreme value theory

Rosano, Gennaro; Begović, Ermina; Boccadamo, G; González, Marcos Míguez; Rinauro, Barbara; Caamaño, Lucía Santiago

doi:10.1016/j.oceaneng.2023.115177

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…In this sub-section, the effect of the damping factor on the synchronism phenomenon is studied, i.e., when Td = Tw. From Equation (7), the component of the induced motion between waves and with resistance is obtained:…”

Section: Influence Of the Damping Factor On The Synchronism Phenomenonmentioning

confidence: 99%

“…As in the first case, the effect of the induced rolling motion is analysed. Therefore, according to Equation (7), for the induced motion, the following equation is obtained:…”

Section: First Case: Very Small Tdmentioning

confidence: 99%

“…This rolling motion is directly related to the above-mentioned intact ship stability because the ship's natural rolling period (Td) is inversely proportional to the square root of the metacentric height (GM), i.e., the ship's loading condition, and directly proportional to the beam of the ship. Rosano et al [7] proposed an interesting system to monitor lateral acceleration and estimate the extreme values that could occur, especially sailing in beam waves and at low speed. To test the system, a mid-sized stern trawler was selected, showing that the operability criterion for lateral acceleration is exceeded in many sea-state conditions.…”

Section: Introductionmentioning

confidence: 99%

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Proposal of a New Control System Making Use of AI Tools to Predict a Ship’s Behaviour When Approaching the Synchronism Phenomenon

Pérez-Canosa,

Orosa

2024

Applied Sciences

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In spite of the IMO’s efforts to improve the safety of intact stability on ships, synchronous rolling still causes large rolling angles, resulting in a very dangerous situation on board. The implementation of automatic tools to predict this undesirable situation has not been widely implemented. Furthermore, the safety of ship stability is not the only responsibility of people involved in the design process, so ship operators must have enough knowledge to predict and avoid these dangerous situations well in advance. Therefore, from a theoretical point of view, in the first part, this paper aims to present a valuable guiding tool for ship operators in order to predict synchronous rolling and avoid undesirable situations on board by making use of only empirical observations of the wave profile and moments. With this purpose, mathematical models are first proposed, with the ship sailing in the worst condition, i.e., with and without considering the damping factor, at zero speed and considering the influence of any pure beam and trochoidal waves. Relevant results shown provide the exact time and wave profile at which the maximum rolling angles are reached. In the second part of the paper, a new control system making use of AI tools is proposed in order to be used by ship operators on board, avoiding dangerous situations. Finally, the results are validated using a set of ship rolling simulations for the most common and representative ship loading conditions and wave periods.

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Section: Influence Of the Damping Factor On The Synchronism Phenomenonmentioning

confidence: 99%

“…As in the first case, the effect of the induced rolling motion is analysed. Therefore, according to Equation (7), for the induced motion, the following equation is obtained:…”

Section: First Case: Very Small Tdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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