【摘要】 基于仿真软件的现代汽车设计过程是一个多阶段的研发过程.为了改善因不同设计阶段仿真工具的差异所引起的数据传递困难、仿真精度不够、工作效率低等问题,采用集成仿真工具实现了同一仿真平台下的直接耦合仿真.集成仿真工具可以建立详尽程度和求解时间规模不同的仿真模型,适应不同设计阶段的需求;而且,在同一仿真平台下,采用不同仿真工具建立各子系统的仿真模型,实现直接耦合仿真,可交互参数不受限制,能够充分考虑瞬态工况下各子系统之间的相互影响,进而提高整个系统模型的计算精度.最后用集成仿真工具GT-Suite软件建立了发动机和冷却系统直接耦合模型,仿真模型详尽,仿真结果丰富,仿真精度较高,使集成仿真的优势得以充分体现.更多还原

【Abstract】 The development of a typical automotive system based on simulation tools proceeds in phases.There are many different tools that are currently used in every stage of the design process.These tools are almost totally disconnected,with attendant loss of accuracy and productivity.In order to improve the problem,this paper carries out direct coupled simulation on a single simulation environment using an integrated simulation tool.This tool can offer models at several different levels of complexity and the time scale so as to select the appropriate models in the different stage.Moreover,direct coupled simulation on a single simulation environment can analysis the subsystems interactions under transient operating conditions in detail and increase the accuracy of the system model because the gap of transferring data between simulation models can be closed by the integrated simulation tool.Finally,this paper builds the direct coupled simulation model of engine and cooling system using the software GT-SUITE,the advantage of integrated simulation is shown fully.更多还原