Naslov
Ship roll control and energy absorption using a U- tube anti-roll tank

Autori
Alujević, Neven ; Ćatipović, Ivan ; Malenica, Šime ; Senjanović, Ivo ; Vladimir, Nikola.

Izvornik
Ocean engineering (0029-8018) 172 (2019); 857-870

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Ship roll control, Anti-roll tanks, Energy harvesting, U-tube tanks, H2 optimisation

Sažetak
In the traditional design of passive anti- roll tanks (ART), the energy associated with the tank fluid motion is dissipated. The work reported in this paper explores the possibility that this energy is instead harvested. It is analytically determined in the paper how the natural frequency and the damping ratio of a U- tube ART should be tuned to maximise the power absorbed by the tank assuming a perfectly flat spectrum of the moment representing the excitation of the ship by waves. It is found that this tuning also minimises the average kinetic energy of the ship roll. This is a result of the fact that the power input of the wave excitation moment into the ship plus tank system does not depend on how the ART is tuned. However, if a more realistic situation is considered, where the roll excitation moment is calculated using a standard wave spectrum, then the power input mildly varies with the tuning of the tank damping ratio. However, it appears from the analysis that the maximisation of the power absorbed by the ART nevertheless approximately corresponds to the minimisation of the mean kinetic energy of the ship roll.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja, Strojarstvo, Tehnologija prometa i transport

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