摘要
为进一步提高水下拖曳系统在不同情况下的预报精度,将水面拖船和水下拖缆视为一个相互影响的整体进行考虑,计入缆-船耦合影响及拖船自身机动影响,采用数值仿真方法探讨整个系统在桨、舵操纵等机动情况下的运动响应特征.采用经典的MMG模型和集中质量法分别描述水面母船的操纵运动和水下拖缆的动态运动,在此基础上建立船-缆耦合运动及动力边界条件将其耦合起来以形成整个系统的运动数学模型,并采用四阶龙格库塔方法积分求解.通过对比仿真计算分析了包括水面拖船在内的整个系统在各种情况下的运动响应.结果显示:当计入船缆耦合影响后,系统的速度和回转性能有所降低;水下拖缆在系统机动过程中因计入水面拖船而自身运动的影响也会表现出更为符合实际的运动特性.
In order to further improve the prediction precision of underwater towed system, this paper treats cable and surface towing ship as a whole, and proposed a scheme to investigate the steady and dynamic response of cable-towing ship system using numerical method when the system was under maneuver of surface ship＇s rudder and propeller, in which the coupling effect between cable and towing ship plays an important role. The MMG model was introduced to describe the motion of surface towing ship, while the cable was modeled by classic Lumped Mass Method; the kinematic and dynamic boundary conditions between them were proposed to unite cable and ship together and thus result in the whole mathematical mod- el, which was solved by the 4th order Runge-Kutta integration procedure. Numerical simulation was carried out to analyze the system＇s response. The results illustrate that the coupling effect between them would lower the velocity and loop maneuver performance of system, and the prediction precision is improved for the ship＇s kinematic response of itself is considered during maneuvering process.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2011年第4期570-575,共6页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(10902067)
上海海事大学科研基金资助项目(20100132)
上海市重点学科建设资助项目(S30602)
关键词
水下拖缆
船舶操纵性
边界条件
数值模拟
towed cable
ship maneuverability
boundary condition
numerical simulation
