文档介绍：5 失控船拖带系统建模与航迹带模拟研究
徐言民基金项目:国家自然科学基金资助(50779033)
徐言民(1976-),男,江苏徐州人,博士研究生,讲师,限制水域通航环境与水域安全研究, ******@whut.
荣祥斌2 刘明俊1
(1武汉理工大学航运学院,湖北武汉 430063;2中海国际船舶管理有限公司,上海 200090)
摘要:基于船舶操纵性运动方程和拖缆的三维动力学运动方程,建立了“拖轮-拖缆-失控船”船舶拖带系统动力学模型,采用数值计算法实现了拖带运动的模拟。拖轮操纵运动模型采用MMG模型,为提高拖带系统建模精度,建模过程中引入了风、浪、流干扰子模块,并采用由试验数据建立的经验公式处理风、浪、流对船舶拖带系统的影响。共分析了无风、浪、流影响,风、浪、流单独影响,风、浪、流联合作用等5种影响状态,并分别进行了模拟计算。模拟结果表明:风对被拖船航迹带的影响相对较小,但拖带系统的漂移较大;流对被拖船航迹带的影响比风的影响大,但相比之下拖带系统漂移较小;波浪对被拖船航迹带的影响最大,航迹带宽约等于被拖船的船长。
关键词:水路运输;拖带;航迹带;操纵性;风致漂移;流致漂移;二阶波浪漂移
中图分类号: 文献标识码:A
Modeling of Tug Towing Disabled Ship System and Simulation of Trajectory
XU Yan-min1 RONG Xiang-bin2 LIU Ming-jun1
(1Navigation College, Wuhan University of Science and Technology, Wuhan: 430063)
(2China Shipping International Ship Management CO., Ltd, Shanghai: 200090)
ABSTRACT: Based on theory of manoeuvrability and 3-demansional dynamics model of towing line, numerical simulation and model experiment are adopted to study the dynamical behaviour of a towing disabled ship system consisting of a tug coupled to a tow through a towline. The MMG manoeuvring model is used as to develop model of towing system. To improve accuracy of simulation, effects of wind, current and second order mean wave drift forces are included in mathematical model. Simulation shows that the trajectory of towing system will be changed due to different environment conditions. Wind