Computations of wave loads and runup for the MOLIKP AQ platform have been carried out on the basis of linear diffraction theory for four configurations corresponding to several water depths, both with and without a berm present. Maximum loads and runup are obtained for a series of regular wave conditions, and for six sea states corresponding to specified wave spectra. Parametric results are provided, and a procedure which utilizes these to provide estimates of maximum loads and runup for any other specified depths and wave conditions is indicated. In developing the wave loading results, comparisons have been carried out with results based on alternative methods applicable to a vertical axisymmetric structure, and to a vertical cylinder of arbitrary section. Such results have been found to be consistent with those obtained by the threedimensional diffraction method. Other effects which are considered include those due to wave breaking, wave nonlinearities, currents, and wave direction. For many of the sea states considered, the maximum loads and runup are limited by wave breaking, so that particular attention is given to the inclusion of associated limits in the calculation procedure. Overall, since the structure was designed to withstand relatively high ice loads, the assessment has indicated that the structure is well suited for deployment at sites exposed to relatively severe wave conditions.


The MOLIKP AQ platform was deployed by Gulf Canada in the Beaufort.sea in 1984. It is a year-round drilling platform for use in the 15 to 50 metre water depth range of the Beaufort Shelf. The engineering and construction required to deploy the MOLIKPAQ have been described by Jefferies et al. (1985), and Jeffries and Wright (1988). The platform itself corresponds to a steel caisson with an octagonal planform and a simply supported deck housing the drilling rig, accommodation modules, etc.

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