船体運動によるタンク内変動圧の計算法について

概要

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A numerical method based on finite element or boundary element modeling is applied to the problem of internal pressure variation of fluid cargo induced by ship motions, assuming incompressive fluid and rigid tank walls. In cases of full loaded tanks subjected to the motion in translation, there have been two different methods proposed for the prediction of pressure so far. In this paper it is shown that a condition should be added to the boundary-value problem, which requires the pressure amplitude be zero at the center of the tank volume. The condition yields anti-symmetric pressure distribution for a rectangular tank in sway motion as shown method B in Fig. 1. The effect of small free surface in an air pipe of the full loaded tank is also investigated. Calculated pressure distributions are found to be similar to those for the tank without air pipe provided a constant value is shifted from all pressure amplitudes.
社団法人日本船舶海洋工学会の論文
1998-03-25