大方尾三体船型阻力及航态预报  

Prediction for resistance and hull gesture of trimaran with large transom-stern

作　　者：刘杨[1] 张海华[1] 苗飞[1] 许凯玮 张旭 LIU Yang;ZHANG Hai-hua;MIAO Fei;XU Kai-wei;ZHANG Xu(Shanghai Branch of China Ship Scientific Research Center,Shanghai 200011,China)

机构地区：[1]中国船舶科学研究中心上海分部,上海200011

出　　处：《舰船科学技术》2021年第9期42-47,共6页Ship Science and Technology

摘　　要：现代船舶无论是单体船型还是多体船型,方尾都得到了广泛的运用,尤其对于三体船型,其多为喷水推进系统,船型设计时主体大多采用了较大方尾的设计。方尾船型在航行过程中,方尾后流场及出水情况随航速不断变化,这也一直是方尾船型阻力预报过程中的重点与难点。基于改进后的近场兴波方法,并对方尾后区域采取特殊处理,结合近水面网格快速划分的方法,对方尾船型的兴波阻力及航行姿态进行预报。得到不同航态下湿表面积后,预报船体总阻力。结合经验公式对低航速下的方尾静水力进行估算。以具有较大方尾的某三体船型为例进行计算,并将计算结果与实验值及部分软件参考结果进行对比,证明了理论方法可行有效。For modern ship, transom stern is widely used in not only mono-hull ship but also high-performance ship. During the sail of transom-stern ship, the flow field behind the transom stern and the emergence of transom stern is changing with the velocity, which is important and difficult for the resistance prediction. Based on the improved Dawson’s method, special treatment is used in the field behind transom stern, and quick grid-generation method near the water plane is connected to predict the wave making resistance and hull gesture of transom-stern ship. Total resistance is predicted by the calculated wetted surface area in different velocities. The hydrostatic force acted on the transom stern is calculated by empirical formula. An actual trimaran with large transom stern is taken as an example for calculation, and the result is compared with experimental result and some reference result by software. Theoretical method is proved valid.

关 键 词：方艉 近场兴波 阻力 航态 湿表面积 

分 类 号：U661.31[交通运输工程—船舶及航道工程]