初期計画における船体振動評価法の構築 : その2 主船体振動数の予測

概要

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In the initial design stage of hull structure, it is usual that the data necessary to evaluate the ship hull vibration are not well provided. In that stage, it is not practicable to carry out the detailed numerical analysis by means of finite element method from view point of lack in data and of time consuming. It is, therefore, desirable to make the simplified formula to evaluate the hull vibration phenomena as accurately as possible with restricted number of data. In this connection, this report describes the methods to evaluate the variable values of hull girder rigidities, weight distribution and wetted sectional area of hull body along the ship length with formulated approximation and obtains the natural frequencies of hull girder vibration up to higher node by means of the energy method. Through these studies, it is obtained that the proposed method is in practical use for the estimation of natural frequency for hull girder because of good agreement with the results of finite element analysis.
社団法人日本船舶海洋工学会の論文
2003-03-20