First year ice interactions on Molikpaq: Measurements and experiments |
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Authors: | Kazuyuki Kato Yasushi Kumakura |
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Institution: | (1) Ship and Marine Technology Department, Research Institute, Ishikawajima-Harima Heavy Industries Co., Ltd., 1 Shin-Nakaharacho, Isogo-ku, 236 Yokohama, Japan |
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Abstract: | The Molikpaq is a steel mobile arctic structure which has been used for exploration of hydrocarbon reserves on the Canadian
Beaufort shelf. In early 1986, the Molikpaq experienced numerous interactions with various ice features at Amanuligak I-65.
An extensive ice loads investigation program was conducted as a joint industrial project. Ishikawajima-Harima Heary Industries
(IHI) has proposed a method to estimate the global ice load on an arctic structure by utilizing results from ice tank experiments.
Experiments were conducted in the IHI ice model tank using a model of the Molikpaq. A comparison between the measured ice
loads and the estimated ice loads was made and it was found to be in fair agreement, in spite of some uncertainties involved
in both the measured and the estimated ice loads. In this paper, instrumentation which the Molikpaq employed in the investigation
program is briefly introduced. Failure modes of ice features observed in the program are also mentioned. The basic idea behind
the dual parameters testing and estimating method (DuPTEM) is described. The model experiments and the results are then outlined.
The comparison between the measured and estimated ice loads is shown. Finally, uncertainties in both the estimated and the
measured ice loads are discussed. |
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Keywords: | arctic structure ice load measurement model experiments |
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