Study Of Structure Optimization About The Stainless-steel Carbody Of Urban Rail Vehicles

Stainless-steel materials because of high strength and corrosion resistance, early in the middle of the twentieth century is applied in urban rail vehicles. In recent years, with rapid development of the material technique and welding process, stainless steel carbody has been widely applied in urban rail vehicles in transit industry, and bring good economic and social benefits. With the new stainless steel series products used in the hull structure, the welding process must be changed from arc welding to electric resistance spot welding structure, design also needs to be changed.In order to improve the commercialization of the urban rail vehicles, stainless steel body has been optimized according to design concept of lightweight and modularization to ensure its strength, stiffness. According to EN 12663 standards, the article established the stainless steel carbody simulation model, determined the load and load case, calculated the stress and strain of the carbody, got the maximum equivalent stress and displacement. Though the compare between the results of simulation and test results, it proved that the simulation model with spotweld element suitable for the stainless steel carbody simulation.The results showed that the fatigue strength of stainless steel body with the simulation analysis satisfy the relevant regulations of EN 12663.These researches fully reflect the stainless steel carbody optimization design of implementation is feasible, and have promoted the level of the design and manufacture of stainless steel carbody and commercialization process.