舶用プロペラ翼の疲労損傷に関する信頼性解析

概要

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Fatigue strength of Ni-Al bronze, which is normally used as large size propeller material, was discussed both experimentally and analitically. P-S-N diagram of Ni-Al bronze was proposed from S-N curve and the same stress level fatigue test results of thirty specimens. By applying modified Miner's rule to P-S-N diagram and the alternating blade stress frequency distribution model, the fatigue strength of propeller blade at various non-failure probability was estimated. It was concluded that the blade stress of high speed ships in operation was a little higher than estimated fatigue strength at stress cycles of 10^9. Furthermore the fatigue strength of notched specimens were examined experimentally and analitically. And the fatigue crack propagation probability was also discussed by Monte Cairo simulation under postulation of distribution functions for crack size, number of cracks, material constants and applied alternating blade strees.
独立行政法人海上技術安全研究所の論文
1987-07-30