The effect of hull angles on ice loads, based on the measured shell plate deformations of a detachable bow on lake Saimaa

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Abstract

In this study, the permanent deformations on the shell plating of the detachable WARC bow were measured and analyzed. The bow was operated mainly on the Saimaa region in Finland from 1986 to 2021. From the measured deformations, the ice loads were calculated using both the analytical methods developed by Ranki and Hayward and non-linear finite element method and these were compared. Finite element analysis was used to show that the load height must have been at maximum 77 mm. The measured loads were compared both to the design ice loads from the IACS PC rules, and to the ice loads calculated with the same basic methods using scenarios and ice properties more aligned with the actual operation of the WARC bow and the ice conditions on lake Saimaa. It was found that the correlation between the hull angles and the ice loads according to the PC rules and the Daley-Popov collision model agree well with the measured results.
Original languageEnglish
Article number104409
Number of pages12
JournalCold Regions Science and Technology
Volume231
DOIs
Publication statusPublished - Mar 2025
MoE publication typeA1 Journal article-refereed

Keywords

  • Ice damage analysis
  • Ice load measurement
  • Non-linear FEM
  • PC rules

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