Toward CAD/CAE-Integrated Dynamics Performance Analysis Technology And Platform Setting Up Of High-Speed Train

In recent years, China’s high-speed railway technology and construction have been remarkable development, related researches have transited from the introduction of foreign experience and technology to independent research and development. Moreover, China’s national conditions should be focused on. High-speed train is a typical complex mechanical and electrical system products, from the current point of view, its product design doesn’t form a design-analysis system. On the one hand, CAD models are usually taken only as a model geometry to import into CAE softwares via neutral files, e.g. iges, step, etc., which requires a lot of time to clean and repair the model, while the models after CAE analysis can’t be fed back to the CAD environment as the guidance of design. on the other hand, CAE analysis tools are multifarious and disorderly each other, and do not form a unified integration platform, which is not conducive to co-analysts.To solve the above problems, this paper briefly analyzes issues and challenges that exist in digital design of high-speed train, employs commercial business platform LMS Virtual.Lab to integrate third-party softwares, and then builds a CAD/CAE unified integration platform for high-speed train. Virtual.Lab natively integrated in CATIA V5 is available as add-on to an existing CATIA V5 installation or as a stand-alone module (in which a substantial subset of the V5 geometry creation tools is made available to the Virtual.Lab user). Due to its CAD integration, Virtual.Lab has the unique capability to provide a quick and easy updating of results after a design change as such gaining significant time when performing different design cycles. the platform can well integrate the third-party softwares into a unified CAD environment, without the need to remodel or model less in CAE softwares. In addition, the platform with a strong secondary development and expansion capabilities.This paper employs CAA V5 and Motion UDF/UDS functions to create some special force elements that distinguish locomotive vehicles from general multibody system applications, and to integrate wheel/rail interaction solver module, which determines wheel/rail contact locations and forces through hybrid programming of Fortran and C++. Finally, we create a simulating model for high-speed railway based-on CAD design model. Comparing with Simpack, the analysis results of CRH2 reveal that the method is valid and available, and brings forward a new study way for CAD/CAE integration for high-speed railway.