近场波形分析方法研究

Study On the Method of Wave Pattern Analysis in the Near-Field

本文概述了各种通过波形测量来反求船体等价奇点的方法。提出了由近场波形反求等价奇点进而计算兴波阻力的方法。克服了以前诸种理论的弊端。奇点的分布起点和止点本文也作了新的尝试。由直壁式抛物线水线面薄船和Todds60两艘船模的计算结果来看,兴波阻力值比用Newman-Sharma方法计算得到的波型阻力值要大,曲线更加接近由拖曳试验求得的兴波阻力曲线,从而解决了长期以来由波型分析法求得的波型阻力小于由拖曳试验换算的兴波阻力的问题。

In this paper various methods on hull equivalent source from wave pattern mesurement are summed up. A method which hull equivalent source and wave resistance can be caculated from wave patterns in the near-fiela is proposed. An attempt is made to the starting point and ending point of source plan. From the caculated results of a thin ship in wall-side form with parabolic water-line and a Todds 60 Models, the caculated wave resistance is larger than the wave pattern resistance which is caculated by the Newman-Sharma method. The agreements between caculated wave resistance curve and the one which is got from the towing experiment are fairly good.