Marine propeller-ice interaction simulation and blade flexibility effect on contact load

A. Kinnunen, V. Lämsä, P. Koskinen, M. Jussila, Tuomas Turunen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)

Abstract

Operating ships in ice covered seas will definitely cause propeller and ice come to interact. The propeller-ice contact problem was widely studied in 1990's. The research resulted to simulation models for the contact process and contact load calculation. These models were developed on assumption of rigid propeller blade. Ice was modelled as mass object with inertia and certain shape, where the propeller blade contacted, causing contact pressure and forces acting on the blade and ice. Significant outcome from these models was that propeller rotational speed, propeller pitch and advance speed in relation to the ice block were dominating factors contributing to the contact load magnitude, direction and duration. The contact loads are significant so propeller blade is expected to deform under such loading. The effect of the blade flexibility on the contact load behaviour can be studied with combining the contact load model and finite element method model of the propeller blade. A state of the art approach is taken as follows: a) simulate propeller-ice contact with rigid, undeformed blade b) calculate blade ice load by ice class rule formula or from contact load model c) use this loading with FEM as static load to determine the propeller blade deformation d) use the resulting deformed blade geometry for propeller-ice contact model. The magnitude of the effect of blade flexibility to ice contact load can be determined this way. If need arises, more advanced methods can be applied to the problem.
Original languageEnglish
Title of host publicationProceedings of the 23rd International Conference on Port and Ocean Engineering under Arctic Conditions
Number of pages12
Publication statusPublished - 2015
MoE publication typeA4 Article in a conference publication
Event23rd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2015 - Trondheim, Norway
Duration: 14 Jun 201518 Jun 2015
Conference number: 23

Publication series

SeriesPOAC Proceedings
ISSN0376-6756

Conference

Conference23rd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2015
Abbreviated titlePOAC 2015
CountryNorway
CityTrondheim
Period14/06/1518/06/15

Fingerprint

Propellers
Ice
Finite element method
Sea ice
Ships
Geometry

Keywords

  • arctic
  • ice covered seas
  • ships

Cite this

Kinnunen, A., Lämsä, V., Koskinen, P., Jussila, M., & Turunen, T. (2015). Marine propeller-ice interaction simulation and blade flexibility effect on contact load. In Proceedings of the 23rd International Conference on Port and Ocean Engineering under Arctic Conditions POAC Proceedings
Kinnunen, A. ; Lämsä, V. ; Koskinen, P. ; Jussila, M. ; Turunen, Tuomas. / Marine propeller-ice interaction simulation and blade flexibility effect on contact load. Proceedings of the 23rd International Conference on Port and Ocean Engineering under Arctic Conditions. 2015. (POAC Proceedings).
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abstract = "Operating ships in ice covered seas will definitely cause propeller and ice come to interact. The propeller-ice contact problem was widely studied in 1990's. The research resulted to simulation models for the contact process and contact load calculation. These models were developed on assumption of rigid propeller blade. Ice was modelled as mass object with inertia and certain shape, where the propeller blade contacted, causing contact pressure and forces acting on the blade and ice. Significant outcome from these models was that propeller rotational speed, propeller pitch and advance speed in relation to the ice block were dominating factors contributing to the contact load magnitude, direction and duration. The contact loads are significant so propeller blade is expected to deform under such loading. The effect of the blade flexibility on the contact load behaviour can be studied with combining the contact load model and finite element method model of the propeller blade. A state of the art approach is taken as follows: a) simulate propeller-ice contact with rigid, undeformed blade b) calculate blade ice load by ice class rule formula or from contact load model c) use this loading with FEM as static load to determine the propeller blade deformation d) use the resulting deformed blade geometry for propeller-ice contact model. The magnitude of the effect of blade flexibility to ice contact load can be determined this way. If need arises, more advanced methods can be applied to the problem.",
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Kinnunen, A, Lämsä, V, Koskinen, P, Jussila, M & Turunen, T 2015, Marine propeller-ice interaction simulation and blade flexibility effect on contact load. in Proceedings of the 23rd International Conference on Port and Ocean Engineering under Arctic Conditions. POAC Proceedings, 23rd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2015, Trondheim, Norway, 14/06/15.

Marine propeller-ice interaction simulation and blade flexibility effect on contact load. / Kinnunen, A.; Lämsä, V.; Koskinen, P.; Jussila, M.; Turunen, Tuomas.

Proceedings of the 23rd International Conference on Port and Ocean Engineering under Arctic Conditions. 2015. (POAC Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Marine propeller-ice interaction simulation and blade flexibility effect on contact load

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AU - Lämsä, V.

AU - Koskinen, P.

AU - Jussila, M.

AU - Turunen, Tuomas

PY - 2015

Y1 - 2015

N2 - Operating ships in ice covered seas will definitely cause propeller and ice come to interact. The propeller-ice contact problem was widely studied in 1990's. The research resulted to simulation models for the contact process and contact load calculation. These models were developed on assumption of rigid propeller blade. Ice was modelled as mass object with inertia and certain shape, where the propeller blade contacted, causing contact pressure and forces acting on the blade and ice. Significant outcome from these models was that propeller rotational speed, propeller pitch and advance speed in relation to the ice block were dominating factors contributing to the contact load magnitude, direction and duration. The contact loads are significant so propeller blade is expected to deform under such loading. The effect of the blade flexibility on the contact load behaviour can be studied with combining the contact load model and finite element method model of the propeller blade. A state of the art approach is taken as follows: a) simulate propeller-ice contact with rigid, undeformed blade b) calculate blade ice load by ice class rule formula or from contact load model c) use this loading with FEM as static load to determine the propeller blade deformation d) use the resulting deformed blade geometry for propeller-ice contact model. The magnitude of the effect of blade flexibility to ice contact load can be determined this way. If need arises, more advanced methods can be applied to the problem.

AB - Operating ships in ice covered seas will definitely cause propeller and ice come to interact. The propeller-ice contact problem was widely studied in 1990's. The research resulted to simulation models for the contact process and contact load calculation. These models were developed on assumption of rigid propeller blade. Ice was modelled as mass object with inertia and certain shape, where the propeller blade contacted, causing contact pressure and forces acting on the blade and ice. Significant outcome from these models was that propeller rotational speed, propeller pitch and advance speed in relation to the ice block were dominating factors contributing to the contact load magnitude, direction and duration. The contact loads are significant so propeller blade is expected to deform under such loading. The effect of the blade flexibility on the contact load behaviour can be studied with combining the contact load model and finite element method model of the propeller blade. A state of the art approach is taken as follows: a) simulate propeller-ice contact with rigid, undeformed blade b) calculate blade ice load by ice class rule formula or from contact load model c) use this loading with FEM as static load to determine the propeller blade deformation d) use the resulting deformed blade geometry for propeller-ice contact model. The magnitude of the effect of blade flexibility to ice contact load can be determined this way. If need arises, more advanced methods can be applied to the problem.

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KW - ice covered seas

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Kinnunen A, Lämsä V, Koskinen P, Jussila M, Turunen T. Marine propeller-ice interaction simulation and blade flexibility effect on contact load. In Proceedings of the 23rd International Conference on Port and Ocean Engineering under Arctic Conditions. 2015. (POAC Proceedings).