Azimuthing propulsor rule development for Finnish-Swedish ice class rules

Ilkka Perälä, Aki Kinnunen, Lauri Kuuliala

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

Abstract

With increasing number of azimuthing propulsor installed on ships, azimuthing propulsor ice class rule development for Finnish-Swedish ice class rules (FSICR) started in 2010. In the beginning of the development project, suitable load scenarios for azimuthing propulsors were identified and applicable ice load calculation methods were reviewed. The two main load scenarios for the propulsors were considered to be impact to floating ice block and penetration to ice ridge. The impact load scenario drove the development of a new dynamic impact load model for Azimuthing units. This impact model was tested against small-scale con-trolled tests on sea ice and also validated with selected full-scale measurements. The ice ridge interaction load scenario was studied with state of the art FE-model of ice ridge and ship interaction. The scientific approaches yielded solid physical background for formulating simplified load estimation formulas for the load scenarios. In addition to the main load scenarios, also impact load distributions were investigated.
The whole project lasted from 2010 to 2016, and it had a steering group consisting of classification societies as well as azimuthing propulsor manufacturers. The work was reviewed and guided with the experts in the steering group. The results of the work are being included as a part of new version of Finnish-Swedish ice class rules.
Original languageEnglish
Title of host publicationMarine Design XIII, Volume 2
Subtitle of host publicationProceedings of the 13th International Marine Design Conference (IMDC 2018), June 10-14, 2018, Helsinki, Finland
EditorsPentti Kujala, Liangliang Lu
PublisherCRC Press
ChapterArctic Design
Pages777-782
Number of pages6
Volume2
ISBN (Print)9781138340763
Publication statusPublished - 11 Jun 2018
MoE publication typeNot Eligible
Event13th International Marine Design Conference, IMDC 2018 - Helsinki, Finland
Duration: 10 Jun 201814 Jun 2018
Conference number: 13

Conference

Conference13th International Marine Design Conference, IMDC 2018
Abbreviated titleIMDC 2018
CountryFinland
CityHelsinki
Period10/06/1814/06/18

Fingerprint

Ice
Ships
Sea ice

Keywords

  • FSICR
  • azimuthing propulsion
  • ice impact
  • ice class

Cite this

Perälä, I., Kinnunen, A., & Kuuliala, L. (2018). Azimuthing propulsor rule development for Finnish-Swedish ice class rules. In P. Kujala, & L. Lu (Eds.), Marine Design XIII, Volume 2: Proceedings of the 13th International Marine Design Conference (IMDC 2018), June 10-14, 2018, Helsinki, Finland (Vol. 2, pp. 777-782). CRC Press.
Perälä, Ilkka ; Kinnunen, Aki ; Kuuliala, Lauri. / Azimuthing propulsor rule development for Finnish-Swedish ice class rules. Marine Design XIII, Volume 2: Proceedings of the 13th International Marine Design Conference (IMDC 2018), June 10-14, 2018, Helsinki, Finland. editor / Pentti Kujala ; Liangliang Lu. Vol. 2 CRC Press, 2018. pp. 777-782
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abstract = "With increasing number of azimuthing propulsor installed on ships, azimuthing propulsor ice class rule development for Finnish-Swedish ice class rules (FSICR) started in 2010. In the beginning of the development project, suitable load scenarios for azimuthing propulsors were identified and applicable ice load calculation methods were reviewed. The two main load scenarios for the propulsors were considered to be impact to floating ice block and penetration to ice ridge. The impact load scenario drove the development of a new dynamic impact load model for Azimuthing units. This impact model was tested against small-scale con-trolled tests on sea ice and also validated with selected full-scale measurements. The ice ridge interaction load scenario was studied with state of the art FE-model of ice ridge and ship interaction. The scientific approaches yielded solid physical background for formulating simplified load estimation formulas for the load scenarios. In addition to the main load scenarios, also impact load distributions were investigated.The whole project lasted from 2010 to 2016, and it had a steering group consisting of classification societies as well as azimuthing propulsor manufacturers. The work was reviewed and guided with the experts in the steering group. The results of the work are being included as a part of new version of Finnish-Swedish ice class rules.",
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Perälä, I, Kinnunen, A & Kuuliala, L 2018, Azimuthing propulsor rule development for Finnish-Swedish ice class rules. in P Kujala & L Lu (eds), Marine Design XIII, Volume 2: Proceedings of the 13th International Marine Design Conference (IMDC 2018), June 10-14, 2018, Helsinki, Finland. vol. 2, CRC Press, pp. 777-782, 13th International Marine Design Conference, IMDC 2018, Helsinki, Finland, 10/06/18.

Azimuthing propulsor rule development for Finnish-Swedish ice class rules. / Perälä, Ilkka; Kinnunen, Aki; Kuuliala, Lauri.

Marine Design XIII, Volume 2: Proceedings of the 13th International Marine Design Conference (IMDC 2018), June 10-14, 2018, Helsinki, Finland. ed. / Pentti Kujala; Liangliang Lu. Vol. 2 CRC Press, 2018. p. 777-782.

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

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PB - CRC Press

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Perälä I, Kinnunen A, Kuuliala L. Azimuthing propulsor rule development for Finnish-Swedish ice class rules. In Kujala P, Lu L, editors, Marine Design XIII, Volume 2: Proceedings of the 13th International Marine Design Conference (IMDC 2018), June 10-14, 2018, Helsinki, Finland. Vol. 2. CRC Press. 2018. p. 777-782