| Résumé | The International Northern Sea Route Project addressed the issue of large-scale, ship hull-ice loading, which would be encountered sailing along the Northern Sea Route. Previous work done on ship hull-ice loads has either been measurements with actual ships, small scale model basin tests, or controlled field tests. This project falls into the last category. Phase 1 of this project had been conducted on lake ice near Calgary [1] and had identified the need for further tests on sea ice, focusing on the effects of prior damage on strength, as well as control of rate. To fulfill this requirement, a series of tests in first-year sea ice was carried out at Tuktoyaktuk in the Canadian Arctic. The concept behind these Phase 2 tests was to simulate the impact of a ship hull with an ice cusp. A hydraulic actuator was used to press an indentor plate against the edge of an ice sheet. The objective was to generate loading over a large contact area, 0.3 m2 with a high aspect ratio; i.e., the ratio of the length to height of the contact patch was up to 8:1. |
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