大型船舶浅水操纵特性  

Maneuvering performance in the shallow water of large-scale ships

作　　者：沈定安[1] 刘洪梅[1] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2009年第5期727-733,共7页Journal of Ship Mechanics

摘　　要：大型船舶在浅水中操纵水动力和附加质量急剧增大是引起回转能力下降的主因,该文就75 000吨级散货船为实例,预报其在各种水深吃水比H/d下操纵性能。文中介绍了操纵运动方程,船体、桨、舵水动力的计算表达,计算船的要素,计算工况及项目。计算结果表明,随H/d减小,相应工况下的无因次战术直径、纵距及初转期都增大,而超越角有所减小,因此该船舶随H/d减小,其回转能力下降,而纠向和保持航向能力有所改善。For large-scale ships, the sharp increases of the maneuvering hydrodynamics and added mass in the shallow water are the main reasons for the decreases of the turning ability. In this paper, the maneuverability for the 75 000DWT bulk carrier,is predicted in different ratio of water depth to draft H/d. The maneuvering motion equation, the hydrodynamics expression of ship hull, propeller and rudder, the particulars of the bulk carrier and all the calculation eases are provided. The calculation results show that the dimensionless tactical diameter, maximum advance and initial turning time will be increased however, the overshoot angles will be decreased when the number of H/d is reduced.It indicates that the turning ability is reduced while the yaw-checking and course-keeping abilities are improved with the decrease of H/d.

关 键 词：大型船舶 浅水 操纵性预报 

分 类 号：U661.33[交通运输工程—船舶及航道工程]