バルクキャリアの構造振動特性の研究(第2報)

概要

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It is necessary to clear the complicated dynamic behaviour of higher mode vibration of hull girder caused by the periodic exciting forces of propeller and main engine in order to reduce the vibration level of ship and design a minimalvibration ship. Several dynamic characteristics of higher mode vibration were obtained by measurements and finite element caluculations on actual ship in the first report. In this report, model experiments and calculations have been carried out to study fundamental characteristics of higher mode vibration in further detail with an aluminum model ship of 3.6 meter length. Vibration was measured on about 750 points of model ship. The finite element calculation model has about 800 joints and about 5000 degrees of freedom. An added mass matrix of the entrained water was calculated by boundary element method and was used in the fluid-structure interactive vibration analysis. Correlation between measurements and calculations, and dynamic behaviour of bottom vibration and side hull vibration have become apparent. Effect of those vibrations upon hull vibration are discussed.
社団法人日本船舶海洋工学会の論文
1986-03-01