风浪中顶推船队操纵特性预报

Maneuvering Characteristic in Wind and Wave for Push Boat Train

论文基于四自由度MMG分离型操纵运动数学模型,预报顶推船队风浪中操纵特性。由计算结果表明,顶推船队在风浪中操舵时,其沿与原航向成?角方向作回转漂移运动,此时不仅存在横倾,而且还存在以该横倾为基准叠加有横摇运动。从综合分析可知,顶推船队在相应工况下风浪中的回转、初始回转及纠向和保持航向能力,随波高a?、风速船速比oaUU/增大而下降;操舵角是影响风浪中回转能力的主因,随操舵角减小,其回转能力急剧下降。

Prediction of maneuverability of a push boat train in wind and wave is performed with a four DOF mathematical model. The calculating results show that turning tract in wind and wave is along original course with angle a , while there is a roll angle, round which rolling motion occurs for the push boat train. The synthesis analysis shows that turning ability, initial turning ability, yaw-checking and course-keeping ability are decreased with wave height ζa, ratio of wind speed to ship’s speed Ua/Uo increased. Steering angle is a key factor influenced turning ability in wind and wave, and turning ability is descended with rudder angle descended.