一种简洁的船舶湿表面网格快速自动生成方法  

Compact method of grid auto-generation of ship wet surface

作　　者：杨晓蓉[1] 余建星[1] 姜丁 丁宁 孙凡[1] 

机构地区：[1]天津大学港口与海洋工程天津市重点实验室 [2]军事交通运输研究所,天津300161

出　　处：《解放军理工大学学报（自然科学版）》2008年第3期274-278,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50579047)

摘　　要：为了能够找到一种统一、简洁、快速的船舶湿表面网格剖分方法,从而提高船舶水动力分析的效率,运用累加弦长理论对型值点的数据做预处理。处理后的型值点数据沿各站型线方向以及船长方向均匀的分布,将经过预处理的型值数据作为双3次B样条曲面的待拟合数据点,通过给予适当边界条件求得双3次B样条曲面进而获得湿表面网格。通过进行水动力算例分析表明,本方法准确、简洁,可以满足水动力分析的需要,不仅克服了曲线连续性低和直舷计算失效的缺点,又省去了对艏艉单独处理和最后整体网格拼接的繁杂工作。To build an unified, compact, and quick method of grid generation of ship wet surface and increase the efficiency of ship hydrodynamics analysis, the accumulative chord length theory was used to preprocess the data of offsets. The distribution of the processed data of offsets was well-proportioned in the direction of the ship body plan and the length of ship. The processed data of offsets was regarded as unde- termined fitting data point of bi-cubic B-spline surface and bi-cubic B-spline surface was calculated by proper boundary condition to obtain the wet surface grid. The example of hydrodynamics calculation was implemented with grid generated; The results indicate that this method is exact, and concise, and satisfies the requirement of hydrodynamics analysis. This method not only overcomes the disadvantage of low curve continuity and failure of straight shipboard calculation but also leaves out complicated work on separate calculation of the bow and stern of ship and grid integration.

关 键 词：湿表面网格 水动力 累加弦长 型值数据 双3次B样条曲面 

分 类 号：U675.79[交通运输工程—船舶及航道工程]