Optimal Design Of The Car-Body Structure Of The 200km/h Electric Locomotive

This thesis is based on the project of the car-body structure calculation of the 200km/h locomotive.As the locomotive power increasing, the weight of the modern main line locomotive is growing. the axle weight of locomotive is not very large because of the limit of roadbed,bridge,rail and so on. At the same time, the number of axles of the locomotive is always few, because of the limit of the curve radius of lines and the structure of locomotive itself. At the present stage, the axle weight of locomotive is usually about 23 ton in our country, the number of axles is always four or six. If the speed of a high-speed locomotive exceeds 200km/h. and the limit of axle weight is even stricter,generally, axle weight is limited below 20 to 21 ton. The weight must be reduced by some way at At the same time, the axle number of a high-speed locomotive is always four.In order to meet the needs of the high-speed rail's development, enhancing the technique level of electric locomotive in our country and narrowing the gap between the world class, the research of 200km/h electric locomotive is carried out by some primary locomotive manufacturing works in 2006.This thesis combines some actual car-body structure of the 200km/h electric locomotive, and do some work below.1. The data is extracted from finite element model of the locomotive car-body which was built by the way of GUI. By making programmer for the data and integrating the processed data, car-body model which can be used to optimize computing will be built up.2. In view of the work conditions of the strength check in the locomotive car-body design, a thorough optimization analysis had been carried out to reduce the weight of the car-body to the minimum with reasonable plate thickness. By analyzing and comparing the results from a series of static strength test and modal test about the original and the optimized car-body under different work conditions, finally I come to the principles of weight reduction of the car-body.3. I analyzed the stiffness of the upper and lower chord beam affecting the strength of locomotive car-body structure. This thesis looks into the problem of locomotive car-body design, and makes optimization calculation on specific locomotive car-body, gets satisfactory results that the weight of the locomotive car-body is reduced from the original 13113kg to 11137kg (reduced 15.07%) which can be applied to the design of the particular locomotive car-body. Besides that, the method of building up the optimization calculation model will save the time of setting up it and can be referred and applied in optimization design of specific locomotive car-body. In addition, analyzed the stiffness of the upper and lower chord beam affecting the strength of locomotive car-body structure, get some results that the effect of the stiffness of the upper chord beam to the strength of locomotive car-body structure is great and the lower chord beam to the strength of locomotive car-body structure is small.