CFDを用いた定加速度斜航試験による付加質量m'_x, m'_yの推定

抄録

Added mass coefficients m'_x, m'_y are important factors to evaluate ship maneuvering motion and are required to describe the ideal fluid force element of our component-type mathematical model of hydrodynamic forces in steering motion. This paper presents a method to calculate added mass coefficients m'_x, m'_y of a ship's superstructure by means of CFD, which can carry out oblique towing tests with constant acceleration. The values m'_x, m'_y of two- and three-dimensional bodies are examined by some methods and in good agreement with theoretical values, potential flow calculations and experimental data except those of a superstructure model of well deck vessel because the size of the superstructure model used in experiment is too small to measure hydrodynamic forces. The results presented in this paper indicate that the CFD method is available to predict added mass coefficients.