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Japanese companies to investigate anti-tip tanks for container ships

Tests have been carried out on scale models of container ships equipped with these tanks.

Isbel Lázaro.

April 9, 2024

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Japan has taken a step forward in maritime innovation by initiating a collaboration for the development and evaluation of anti-roll-over tanks (ART) on large container ships.

This alliance has materialized through a research and development agreement between ClassNK, Nihon Shipyard and IMC, focusing on optimizing the safety and efficiency of ARTs on these giants of the sea. Through this agreement, the three entities combine their efforts to effectively apply ARTs in real-world shipping, leveraging their knowledge and collected data to improve ship stability.

Nihon Shipyard is tasked with developing an ART installation scheme that suits the needs of large container ships, while IMC will demonstrate how ARTs can mitigate vessel sway. For its part, ClassNK will be dedicated to formulating accurate evaluation methods for these systems.

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How do roll-over tanks work?

ARTs work by displacing liquid inside a tank to counteract the rolling of the ship and are being considered for inclusion on these large vessels to improve the efficiency of container shipping by minimize oscillating movements and prevent parametric balancing, a phenomenon that can cause load collapse.

This resonance phenomenon, known as parametric rolling, amplifies the motion of the ship and occurs when the period of natural oscillation coincides with twice the period of the waves. ClassNK has integrated regulations aimed at the safe operation of vessels with ART, highlighting in its guidelines preventive measures against parametric rolling.

In addition, tests have been carried out on scale models of container ships equipped with ART in collaboration with the National Maritime Research Institute of Japan, demonstrating its effectiveness against parametric and synchronous rolling during tests conducted in 2023.

This technological breakthrough promises to revolutionize safety and efficiency in shipping. container shipping container shipping and in turn opens up new avenues of research for the implementation of similar technologies on other types of vessels, thus enhancing stability and efficient loading in a wide range of maritime conditions.

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Source: marinelink.com

Photo: shutterstock