耐航性能を考慮した高速艇の設計法に関する研究(その2)

抄録

The effect of deadrise angle β on the performance of high speed craft is discussed. Tank tests were carried out by use of series models with three (3) different deadrise angle in order to investigate the effect of them on the vertical acceleration of the craft both in regular and irregular waves, and the resistance of hull in smooth water. Measured acceleration was compared with calculated one by non-linear strip theory. The results are summarized as follows; (1) To improve the seaworthiness of high speed craft which cruise in rough water, larger deadrise angle has the advantage in vertical acceleration compared with conventional deadrise, about 20°. (2) The conventional deadrise angle, about 20°, has the most appropriate capability in resistance of high speed craft in the range of Froude number over 0.8. (3) Computer simulation program based on non-linear strip theory is very useful to evaluate seakeeping qualities for preliminary design of high speed craft.