船体と上部構造の連成振動 : 実船の振動解析

概要

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In this paper, coupled vibration analyses between longitudinal-vertical vibration of main hull girder and longitudinal vibration of superstructure for two container ships are carried out using two-dimensional finite element method and beam models. On the other hand, vibration tests were carried out during construction and trial trip, the results of which are compared with calculated frequencies and responses. The major conclusions obtained from these calculations and measurements are as follows: (1) The natural frequency of superstructure is fairly affected by the funnel interaction when the difference between both uncoupled frequencies is small. (2) There is possibility which coupling effect with vertical vibration of main hull girder may be more than 10% on the natural frequency of superstructure. (3) To predict the responses in operating condition with due accuracy, further investigation for some vibration factors, such as estimation method for propeller exciting forces, damping factors in main hull girder and local structure and so on, are necessary.
社団法人日本船舶海洋工学会の論文
1980-03-20