极浅水域船舶航行阻力及下沉量数值计算方法  

Numerical calculation method of resistance and sinking of ships in extremely shallow waters

作　　者：叶青[1] 陈君杰 向国 YE Qing;CHEN Junjie;XIANG Guo(College of Naval Architecture and Ocean Engineering,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学舰船与海洋学院,武汉430033

出　　处：《海军工程大学学报》2024年第1期105-112,共8页Journal of Naval University of Engineering

摘　　要：针对舰船在极浅水域中的航行阻力及航行安全预报问题,提出了静力平衡方程与叠模定常流计算相结合的数值计算方法。经分析比较可知,该方法只需进行一次姿态调整,姿态收敛偏差即可小于5%。水动力计算结果与水池模型试验结果对比表明:当深度/吃水比(h/T_(m))为1.18时,阻力预报相对偏差为3%左右、下沉量绝对偏差小于2 mm,触底航速预报相对偏差小于5%。该方法可有效避免计算过程中姿态波动导致解算失败的问题,具有良好的计算稳定性和收敛性,且计算精度较高,可为浅水航行船舶航行性能数值计算提供借鉴和参考。In view of the resistance and navigation safety of ships in extremely shallow waters,a numerical prediction method combining static balance equation with the calculation of the steady flow of the stack model was proposed.Analysis and comparison indicate that the method requires only one attitude adjustment,and the attitude convergence error can be less than 5%.Compared with the model test,the calculation results show that when h/T_m=1.18,the resistance prediction deviation is about 3%,the subsidence deviation is less than 2 mm,and the bottom speed prediction deviation is less than 5%.The method can effectively avoid the problem of solution failure caused by attitude fluctuation in the calculation process.It is characterized by good computational stability and convergence,and high calculation accuracy,and thus can serve as reference for numerical calculation of navigation perfor-mance of ships in shallow water.

关 键 词：限制航道 极浅水域 下沉量 静力平衡方程 

分 类 号：U661.31[交通运输工程—船舶及航道工程]