超大型船舶旋回调头的实时动态仿真

为了进行船舶操纵方案论证，船舶通航安全评估，应用日本MMG分离建模方法，建立了大型船舶操纵运动的仿真模型。应用幂级数展开理论和三角级数回求方法，给出了电子海图中等量纬度的直接正反解算法和相关的坐标转换算法，给出了所需拖轮数量的实用估算方法，在此基础上，建立了单机版船舶操纵仿真平台并对大型船舶在出船坞旋回调头靠大连新船重工的舾装码头进行实时动态仿真。仿真的结果比较可靠，对船长，驾驶员具有重的参考价值，也为需方在进行决策时提供了科学的依据。

Real Time Dynamic Simulation of Very Large Ship Turning

In order to perform the analysis of ship maneuvering scheme and the evaluation of ship navigation safety a mathematical model of very large ship maneuvering was set up based on the Japanese MMG separately building model idea. Using power series expansion theory and trigonometric power series calculating back method, a direct positive and negative solution algorithm of equal latitude in electric chart, and relative coordinate transforming algorithm were introduced, and a method of estimating the number of needed tugs for practical use was also given in this paper. On the above basis a monoboard computer simulation platform was established, and then real time dynamic simulation of a very large ship departing from shipyard, turning and berthing to outfitting wharf of Dalian New Ship Heavy Industry was carried out. The result of simulation was reliable and can be provided to captains and pilots for reference as well as offered scientific basis for making decision.