Prediction of Hydrodynamic Pressure on the Bulbous bow of a Ship Moving in Waves

摘要

Theoretical prediction of oscillatory pressures on the sonar dome of a CGN-38 Class ship proceeding in waves is made using a strip theory. The predicted values are compared with the measured values from a model experiment. Five locations on the dome are chosen for the comparison, and agreement between predicted and measured values is good except for the pressures at a point on the bottom side of the dome. The good agreement is considered to be attributed to the fact that the pressure head change due to the oscillatory vertical displacement of the dome, which is predicted reasonably well by the strip theory, is the dominant effect on the oscillatory pressures. The reason for the discrepancy between predicted and measured results on the bottom side of the dome may be due to shortcomings of the strip theory, but this question is unresolved. (Author)