轮机系统仿真中流体网络方法的研究

Applications of Fluid Networks in Marine Engineering System Simulation

基于整个轮机系统的流体特性研究，将系统中所有的控制体分别抽象为压力节点和流量支路，并采用流体网络的方法来建立轮机系统的网络模型．根据网络的拓扑结构构造系统的节点支路图，并添加轮机单元设备，最终建立由质量守恒、能量守恒等方程组成的数学模型；同时提出了求解流体网络模型的算法．通过求解轮机系统中各单元设备的瞬态参数，可以实现整个系统的流量和压力由于单元参数变化而引起的动态变化过程仿真，从而揭示由于模块连接和耦合产生的系统性能内在变化规律．

Based on the fluid characteristics of whole marine system,each control object is abstracted and simplified into pressure nodes and flow branches.Moreover,the method of flow network is used in this paper to build the network models of marine system.After that,a mathematical model complying with the laws of conservation of energy and mass is built successfully by both considering the characteristics of the topology of flow network and appending the models of marine system units to it.In the meantime,algorithm of the flow network models is given to work out the dynamic parameters of each unit,so as to simulate the dynamic response of pressure and flow in the whole marine system caused by the parameters' varying in a single unit and shows the inherent varying rules of system performance under the linking and coupling among models.