Analysis of an ice cone impact with a hull structure through the use of large pendulum impacts and finite element analyses

Holloway, Spencer J. (2021) Analysis of an ice cone impact with a hull structure through the use of large pendulum impacts and finite element analyses. Masters thesis, Memorial University of Newfoundland.

[English] PDF - Accepted Version Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Download (4MB)

Abstract

When considering hull structure impacts with large ice pieces, there is still much left to understand. As well, there is a lack of information available when considering the development of finite element models of these impact types. This thesis analyzes a grillage from the ex-HMCS IROQUOIS Royal Canadian Navy destroyer, which had a service life of nearly 45 years. Through a large double-pendulum apparatus, the grillage was impacted by an ice cone indenter. The study then continues by replicating the grillage as accurately as possible through the use of newly procured steel. This copy grillage was then also impacted by a large ice cone indenter. Both experiments were then replicated through finite element analysis. The study focuses on the capabilities of hull structures through comparing aged and new steel, as well as comparing the experimental data to respective finite element analyses. The capabilities of the original and copy grillages were shown and the overall study was developed as a benchmarking tool when considering the development of finite element models with respect to real-world ice impact experiments.

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