Simplified ice impact load estimate for azimuthing thrusters

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

Abstract

In winter navigation, a viable ice load scenario for azimuthing propulsor is an ice block impact to the propulsor structure. Such scenario is featured in the new Finnish-Swedish Ice Class Rules. This case can be considered as a dynamic process, where the ice contact and the structural deflection are contributing factors towards the net load on the propulsor structure.
The ice contact between the propulsor and ice together with the propulsor structure dynamics were implemented in a dynamic impact model. The model was validated with small-scale testing and full-scale reference cases.
With the dynamic model, the effect of operational and dimensional parameters to the ice impact load were studied. However, the use in ice class rules requires simplified formulation. This formulation should take easily understandable physical parameters as input, and provide a rule-of-thumb- results for ice impact load.
In this paper, the development of the simplified approach is presented, the simplified model is tested and its key parameters are identified.
Original languageEnglish
Title of host publicationProceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions
PublisherLuleå University of Technology
Number of pages10
Publication statusPublished - 2019
MoE publication typeA4 Article in a conference publication
Event25th International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2019 - Delft, Netherlands
Duration: 9 Jun 201913 Jun 2019
Conference number: 25

Publication series

NameProceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions
PublisherPOAC
ISSN (Print)0376-6756
ISSN (Electronic)2077-7841

Conference

Conference25th International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2019
Abbreviated titlePOAC
CountryNetherlands
CityDelft
Period9/06/1913/06/19

Fingerprint

Ice
Dynamic models
Navigation
Testing

Keywords

  • Ice
  • Impact
  • Load
  • Azimuthing thruster

Cite this

Kinnunen, A., Perälä, I., & Tikanmäki, M. (2019). Simplified ice impact load estimate for azimuthing thrusters. In Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions Luleå University of Technology. POAC Proceedings, Vol.. 2019-June
Kinnunen, Aki ; Perälä, Ilkka ; Tikanmäki, Maria. / Simplified ice impact load estimate for azimuthing thrusters. Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions. Luleå University of Technology, 2019. (POAC Proceedings, Vol. 2019-June).
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abstract = "In winter navigation, a viable ice load scenario for azimuthing propulsor is an ice block impact to the propulsor structure. Such scenario is featured in the new Finnish-Swedish Ice Class Rules. This case can be considered as a dynamic process, where the ice contact and the structural deflection are contributing factors towards the net load on the propulsor structure.The ice contact between the propulsor and ice together with the propulsor structure dynamics were implemented in a dynamic impact model. The model was validated with small-scale testing and full-scale reference cases.With the dynamic model, the effect of operational and dimensional parameters to the ice impact load were studied. However, the use in ice class rules requires simplified formulation. This formulation should take easily understandable physical parameters as input, and provide a rule-of-thumb- results for ice impact load.In this paper, the development of the simplified approach is presented, the simplified model is tested and its key parameters are identified.",
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Kinnunen, A, Perälä, I & Tikanmäki, M 2019, Simplified ice impact load estimate for azimuthing thrusters. in Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions. Luleå University of Technology, POAC Proceedings, vol. 2019-June, 25th International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2019, Delft, Netherlands, 9/06/19.

Simplified ice impact load estimate for azimuthing thrusters. / Kinnunen, Aki; Perälä, Ilkka; Tikanmäki, Maria.

Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions. Luleå University of Technology, 2019. (POAC Proceedings, Vol. 2019-June).

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

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N2 - In winter navigation, a viable ice load scenario for azimuthing propulsor is an ice block impact to the propulsor structure. Such scenario is featured in the new Finnish-Swedish Ice Class Rules. This case can be considered as a dynamic process, where the ice contact and the structural deflection are contributing factors towards the net load on the propulsor structure.The ice contact between the propulsor and ice together with the propulsor structure dynamics were implemented in a dynamic impact model. The model was validated with small-scale testing and full-scale reference cases.With the dynamic model, the effect of operational and dimensional parameters to the ice impact load were studied. However, the use in ice class rules requires simplified formulation. This formulation should take easily understandable physical parameters as input, and provide a rule-of-thumb- results for ice impact load.In this paper, the development of the simplified approach is presented, the simplified model is tested and its key parameters are identified.

AB - In winter navigation, a viable ice load scenario for azimuthing propulsor is an ice block impact to the propulsor structure. Such scenario is featured in the new Finnish-Swedish Ice Class Rules. This case can be considered as a dynamic process, where the ice contact and the structural deflection are contributing factors towards the net load on the propulsor structure.The ice contact between the propulsor and ice together with the propulsor structure dynamics were implemented in a dynamic impact model. The model was validated with small-scale testing and full-scale reference cases.With the dynamic model, the effect of operational and dimensional parameters to the ice impact load were studied. However, the use in ice class rules requires simplified formulation. This formulation should take easily understandable physical parameters as input, and provide a rule-of-thumb- results for ice impact load.In this paper, the development of the simplified approach is presented, the simplified model is tested and its key parameters are identified.

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Kinnunen A, Perälä I, Tikanmäki M. Simplified ice impact load estimate for azimuthing thrusters. In Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions. Luleå University of Technology. 2019. (POAC Proceedings, Vol. 2019-June).