对某内河海巡艇快速性未达设计要求的线型分析

Analyses and Research on Speed Performance of a River Patrol Vessel Unable to Meet Design Requirement

针对某内河海巡艇的试航速度未达设计要求，分析研究了该船的阻力与推进性能。研究结果认为，问题的关键在于该船的线型应船东要求将原设计的方尾改变为圆尾线型，致使其在航行时无法产生流体动升力而使船舶向过渡型航行状态演变，一直维持在排水量型状态航行；加之，试航水域的水深限制引起兴波阻力激增，导致速度无法提高。以上分析，可引起内河快艇设计时充分注意。

This paper described the resistance and propulsion performance analysis on a river patrol vessel which did not reach the design trial speed. It was indicated that the main reason was the change of the ship stern form, from originally transom line to round line as requested by ship owner,which cause the failure of inducting hydrodynamic lifting force. Thus, the vessel was operating as a vessel of displacement type, not a high speed vessel of transition type. In addition, the wave resistance increased dramatically due to the shallow water effect. All these could serve as reference for high speed patrol vessel design for river navigation.