Research on the structure of high-speed train fatigue simulation platform

To the demands of fatigue strength analysis of the vehicle bogie, the paper gives a general system-level fatigue simulation method based on virtual prototype. On the basis of the method, Integrating data analysis system of vehicle dynamic stress testing and vehicle fatigue simulation system with general commercial software system, Vehicle bogie fatigue simulation platform has been set up. To obtain dynamic stress-time histories, three methods of testing in real field, hybrid simulation and numeric simulation are presented. Based on these methods, a dynamic stress history simulation software system has been developed. Some fatigue life estimation methods and tools are integrated in the system, which has 3D user interface. In addition, the problem of rain-flow cycle counting for unbounded data stream is solved in this system. Database for material fatigue properties adapting to china's railway industry is also set up in the platform. XML is utilized to save and exchange data among all subsystems and more data exchange and collaborative method among multiply disciplinary are discussed in detail. The platform has a friendly, open and easily removable interface and is valuable for practical use.