信頼性解析にもとづく船殻構造の疲労設計
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概要
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The rational ship hull design calls for consideration for structural safety as well as for economics. This boils down to the question of how best to optimize the allowance for potential hull structural failures, and for that purpose employing the demand-capability concept, or reliability concept, is a sensible approach to take. In fact, several papers have been written on the application of the reliability concept in evaluating the required ship hull structural strength. Regarding the detailed ship hull structural design, the author performed, for clarification of the logic of fatigue failure, the Fault Tree Analysis to determine structural strength requirements. And the author confirmed that the method of stress or fatigue analysis written in this paper could be successfully applied in explaining failures or potential failures of other structural members of similar structures. In addition, the author designed, using assumed stress conditions, frame end structures. In this, structural stress concentration factor of plural number of frame end structures, results of actual hull structural failure analysis, and the scatter in theoretical and experimental data on the crack initiation and propagation in frame ends were used to select the detailed frame end profiles which could offer adequate reliability required in view of predicted crack initiation and propagation lives. The research performed by the author therefore is intended to demonstrate that the reliability concept could successfully be applied in fatigue design of actual hull members, as well as to show in what manner to perform the fatigue design.
- 社団法人日本船舶海洋工学会の論文
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