In actual operation process of a ship, the engine-propeller-hull is an integrated system with internal coupling effects, and thus there is a close interaction between the diesel engine propulsion system operation conditions and the ship manoeuvring motions. The propulsion system can experience large power fluctuation during manoeuvring, with considerable torque increase with regard to the stabilized value in straight course. However, the diesel engine propulsion system behaviour and ship manoeuvrability are usually studied separately as they are considered to belong to different disciplines. Thus, it is difficult to reflect the actual operating characteristics of the propulsion system and ship manoeuvring motion under coupled conditions in actual operation. To investigate the interaction between the propulsion system behaviour and the manoeuvrability of a large containership, this paper proposed a multi-disciplinary ship mobility model capable of coupling the marine diesel engine model and the ship manoeuvring model. In the engine model, the mean value modelling approach was adopted to simulate the two-stroke marine diesel engine considering the fact that it can capture the performance of the engine sub-systems including scavenging receiver, exhaust gas receiver, turbocharger, etc. In the manoeuvring model, the MMG-based method was used to simulate the ship manoeuvring motion with three degrees-of-freedom. The engine model and manoeuvring model were coupled through the propeller model that transferring propeller speed and torque between the two models. The coupled model was validated against the engine shop test data and the sea trial results. By applying this coupled model, a series of simulations of turning circle manoeuvres under various scenarios were performed. The simulation results presented the dynamic response of engine internal sub-systems during turning circle manoeuvring, explained the effect of the torque limiter on engine performance and ship manoeuvring motion, and analyse the influence of different propulsion system control strategies on the ship turning circle manoeuvrability. Although the presented case study has been validated on a specific ship, most of the discussed models have a general application.

在船舶实际运行过程中，发动机-螺旋桨-船体是一个具有内在耦合作用的集成系统，因此柴油机推进系统工况与船舶操纵运动之间存在着密切的相互作用。推进系统在操纵过程中可能会经历较大的功率波动，相对于直线航线的稳定值，扭矩增加相当大。然而，柴油机推进系统行为和船舶操纵性通常被分开研究，因为它们被认为属于不同的学科。因此，在实际运行中很难反映耦合条件下推进系统和船舶操纵运动的实际运行特性。为了研究推进系统行为与大型集装箱船操纵性之间的相互作用，本文提出了一种能够耦合船用柴油机模型和船舶操纵模型的多学科船舶机动性模型。在发动机模型中，考虑到二冲程船用柴油机可以捕获包括扫气接收器、废气接收器、涡轮增压器等在内的发动机子系统的性能，采用平均值建模方法进行模拟。机动模型，基于MMG的方法被用来模拟具有三个自由度的船舶操纵运动。发动机模型和操纵模型通过螺旋桨模型耦合，在两个模型之间传递螺旋桨速度和扭矩。耦合模型根据发动机车间测试数据和海试结果进行了验证。通过应用该耦合模型，对各种场景下的转圈机动进行了一系列模拟。仿真结果展示了发动机内部子系统在转弯圆操纵过程中的动态响应，解释了扭矩限制器对发动机性能和船舶操纵运动的影响，并分析了不同推进系统控制策略对船舶转弯圆操纵性的影响。尽管所提供的案例研究已在特定船舶上得到验证，但大多数讨论的模型具有一般应用。仿真结果展示了发动机内部子系统在转弯圆操纵过程中的动态响应，解释了扭矩限制器对发动机性能和船舶操纵运动的影响，并分析了不同推进系统控制策略对船舶转弯圆操纵性的影响。尽管所提供的案例研究已在特定船舶上得到验证，但大多数讨论的模型具有一般应用。仿真结果展示了发动机内部子系统在转弯圆操纵过程中的动态响应，解释了扭矩限制器对发动机性能和船舶操纵运动的影响，并分析了不同推进系统控制策略对船舶转弯圆操纵性的影响。尽管所提供的案例研究已在特定船舶上得到验证，但大多数讨论的模型具有一般应用。