DECISION METHODS OF THE DAY BEFORE JUDGEMENT FOR POSSIBILITY OF MARINE CONSTRUCTION BASED ON WAVE INFORMATION

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  • 波浪情報に基づく海上作業可否の前日判断

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<p> In this study, we investigated various approaches to assess the advisability on the day before marine construction works, which is based on error characteristics derived from the disparity between forecasted and observed wave variables. We applied these approaches to the Akita Port and the Hitachinaka Port, representing the Japan Sea and the Pacific Ocean, respectively. The simplest and most straightforward method involved calculating the root mean square (RMS) of the error. The RMS was added to the forecasted wave height and the resulting value was checked whether it falls below the permissible wave height for construction work. However, it was determined that this method tends to be overly cautious in its judgment. As an alternative, we proposed the application of the safety factor method, which is a conventional approach in civil engineering design. We found that the safety factor method yielded a safety margin comparable to that obtained from the error probability distribution.</p>

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