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Evaluation, design and optimization for strength and integrity of polar class propellers

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1016/j.coldregions.2015.02.001
AuteurRechercher : 1; Rechercher : ; Rechercher :
Affiliation du nom
  1. Conseil national de recherches du Canada. Génie océanique, côtier et fluvial
FormatTexte, Article
Sujetbending moments; ice; offshore structures; pipeline bends; propellers; safety factor; design and optimization; ice-structure interaction; in-plane bending moment; International Association of Classification Societies; minimum safety factor; out-of-plane bending; polar class; R-class; loading; bending; design; fluid-structure interaction; ice breaker; ice-structure interaction; navigation; optimization; panel data
Résumé
An advanced 3D unsteady panel method was developed for the design and optimization of the strength and integrity of polar class propellers. Blade ice loading specification in both milling and impact cases, under the Unified Polar Class Rules (URI3), by the International Association of Classification Societies (IACS), was implemented. An optimization example and analysis were given for an R-class propeller. The strength of the R-class propeller was assessed for all 7 polar classes and 5 loading cases. Comparison was also made for all polar classes and ice loading cases. As the blade has little skew with a wide chord, both the spindle torque and the in-plane bending moment are small, so only out-of-plane bending failure is the key factor for strength. It was also found that by URI3, there is little difference in strength requirement between polar classes 1 (strongest requirement) and 7 (the weakest). An integrity design and optimization example showed a saving of 1.4. tonnes of blade material (22% saving) by decreasing the safety factor to 1.51 (the minimum safety factor under URI3 is 1.5), for which case the blade thickness is about 80% of the existing design.
Date de publication
Maison d’éditionElsevier
Dans
  • Cold Regions Science and Technology 113 : 31–39.
Langueanglais
Publications évaluées par des pairsOui
Numéro du CNRCOCRE-PR-2015-003
Numéro NPARC21275788
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Identificateur de l’enregistrement3fe4e28f-cd1e-4bd2-9fd2-e8479f825454
Enregistrement créé2015-07-14
Enregistrement modifié2020-04-22
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