データベース法を活用した上部構造振動の最適設計法(第2報) : 局部振動体との連成効果を考慮した場合

概要

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In vibration design of resonant avoidance to fore and aft vibration of superstructure, it is an important technology to estimate accurate natural frequency and to avoid it from resonant zone of blade or cylinder frequency in case of resonance. In this second report, authors investigated coupled vibration effect of local vibrating body such as funnel or dodger upon natural frequency of superstructure. By connecting funnel casing and deck of superstructure, natural frequency of superstructure becomes extremely high when its fundamental frequency exists higher than that of funnel. It is shown that this phenomenon can be applicable to avoid resonance in actual ship design of superstructure vibration. Long wings(dodgers)which exist at navigation bridge deck also affect the natural frequency of superstructure. Coupled vibration effect of dodger is found to lower natural frequency of superstructure.
社団法人日本船舶海洋工学会の論文
2000-03-25