基于数字孪生的舰船蒸汽动力总体模型框架研究

目的]为了实现舰船蒸汽动力系统的数字化、网络化和智能化,提出一种总体数字孪生模型应用体系。方法]从物理对象、过程要素、生命周期及虚拟空间这4个维度,提出基于数字孪生的舰船蒸汽动力系统总体“四维思想模型”,并创建总体全生命周期的“五阶体系模型”,涵盖概念论证、系统设计、总装建造、试验试航及运维保障这5个典型的阶段。通过引入大数据、物联网、云计算、人工智能和基于模型的系统工程等先进技术,形成由物理层、接口层、数据层、模型层、调度层、功能层及应用层组成的舰船蒸汽动力系统总体数字孪生“7层架构模型”。结果]舰船蒸汽动力系统虚拟设计分析及试验平台的验证结果表明,数字孪生体系框架可以有效支撑系统方案设计、操作运行分析及试验方案评估,从而实现舰船全生命周期中物理空间与虚拟空间的交互协同。结论]研究成果可为舰船蒸汽动力系统的总体数字化设计提供参考。

Analysis on the overall model framework of ship steam power based on digital twin

Objectives]In order to realize the digitalization,networking and intellectualization of ship steam power systems,this paper puts forward an application system based on a digital twin model.Methods]The"four-dimensional thought model"of a ship steam power system based on a digital twin is proposed,covering the four dimensions of physical object,process element,life cycle and virtual space.The"five order system model"of the whole life cycle of the power system is then established,including five typical stages:concept demonstration,system design,general assembly and construction,trial run,and operation and maintenance.Advanced technologies such as big data,internet of things,cloud computing,artificial intelligence and model-based system engineering are introduced,and the overall digital twin"seven-layer architecture model"of a ship steam power system is formed,composed of the physical layer,interface layer,data layer,model layer,scheduling layer,function layer and application layer.Results]The verification results of the virtual design analysis and test platform of the ship steam power system show that the digital twin system framework can effectively support the system's scheme design,operation analysis and test scheme evaluation,and realize interaction and cooperation between the physical space and virtual space throughout the whole life cycle of the ship.Conclusions]The results of this study can provide valuable references for the overall digital design of ship steam power systems.