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- W4311421749 abstract "During ship operations in ice-covered waters, propellers often collide with sea ice pieces. This phenomenon represents a severe hazard that affects the torsional stress state of shafting systems and, ultimately, the ship propulsion system reliability. Classification Societies provide ship designers with design loads and criteria to simulate these events, but there are still uncertainties on the actual characteristics of the impacts that ice-class propellers undergo. This paper presents the results of a research activity that combines experimental measurements and numerical analysis to identify the correlation between ice-induced propeller loads and sea ice conditions. The Canadian Coast Guard (CCG) icebreaker Henry Larsen is considered a case study; we simulate its propulsion shaftline as a lumped-element system and validate this model against full-scale data. A series of numerical simulations to predict the ice-induced impact loads on the propeller was performed by using measured dynamic torque data as the analysis input. Finally, the resulting values were correlated with the ice thickness data acquired while the ship was operating. We compare this ice–propeller torque distribution with the homologous quantities calculated as per the current Polar Class framework. The results show high torque response values even when the ship operates in thin ice." @default.
- W4311421749 created "2022-12-26" @default.
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- W4311421749 date "2023-01-01" @default.
- W4311421749 modified "2023-10-18" @default.
- W4311421749 title "Torsional vibrations of Polar-Class shaftlines: Correlating ice–propeller interaction torque to sea ice thickness" @default.
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- W4311421749 doi "https://doi.org/10.1016/j.oceaneng.2022.113250" @default.
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