一种简洁的船舶湿表面网格快速自动生成方法

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.

Compact method of grid auto -generation of ship wet surface

To build a n unified, compact, and quick method o f g rid generation o f ship w et surface and increase the ef ficiency o f ship hydrodynamics a nalysi s, the accumulativ e cho rd leng th theo ry w as used to preprocess the data of o ff set s. The dist ributio n of the processed data o f of fsets was w ell-propo rtio ned in the di rectio n of the ship body plan and the leng th of ship. The processed data of of fsets was regarded as undetermined fit ting data point of bi-cubic B-spline surface and bi-cubic B-spline surface w as calculated by proper boundary co ndi tio n to o btain the w et surface g rid. The ex ample of hy drody namics calculation w as implemented wi th g rid g enerated; The result s indica te tha t thi s metho d is ex act, a nd concise, a nd sati sfies the requi rement o f hydrodynamics a nalysi s. Thi s metho d not only ov ercomes the disadv antag e o f low curv e continui ty and failure of straight shipboa rd calcula tio n but also leav es o ut complicated w o rk o n separate calculatio n of the bow and stern of ship and g rid integ ration.