抄録
The experimental results on the water impact accelerations of axially symmetric bodies are presented in this paper. The bottom surfaces of the models were the flexible spherical shells made of PMMA and expected to have much interaction with the fluid. Three types of the models, whose bottom thicknesses were 4.0mm (S-6), 2.5 mm (S-7), and 1.8mm (S-8), were used and these bottoms had the same radius of curvature. A model (S-5) made of acetal copolymer whose bottom was thick was also used to compare with these three models. The bottom of this model could be considered very rigid and to have little interaction with the fluid. The experimental results on the water impact accelerations were compared with the author's analysis. The analysis explained qualitatively the experimental phenomena very well.
