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

    SeriesPOAC Proceedings
    Volume2019-June
    ISSN0376-6756

    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).
    @inproceedings{5202b83bc0294ffea08019d4581959f4,
    title = "Simplified ice impact load estimate for azimuthing thrusters",
    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.",
    keywords = "Ice, Impact, Load, Azimuthing thruster",
    author = "Aki Kinnunen and Ilkka Per{\"a}l{\"a} and Maria Tikanm{\"a}ki",
    year = "2019",
    language = "English",
    series = "POAC Proceedings",
    booktitle = "Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions",
    publisher = "Lule{\aa} University of Technology",
    address = "Sweden",

    }

    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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    T1 - Simplified ice impact load estimate for azimuthing thrusters

    AU - Kinnunen, Aki

    AU - Perälä, Ilkka

    AU - Tikanmäki, Maria

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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).