| Railway freight transport has played a pivotal role in Chinese economic development, and then the box wagon makes a20percent of the total number of freight wagon. In recent years, with the increase of number and types of the added-value freight the requirements in safety and velocity for freight transport are continuously needed imminently. On the other hand, the full speed of the passenger transport and the application of new high-speed EMU put higher demands on the speed of freight train to reduce the velocity contrast of both passenger and freight trains and make full use of transportation capacity of high-speed railway. In addition a few Railway Expresses also exposed some problems during operation: for example the Weight coefficient is too large, the load capacity is not enough, and normal anti-corrosion material can not meet the requirements of high-speed freight train. So under the situation, it is imperative to develop160km/h rapid-speed freight train as soon as possible. In addition, the development of new materials, process and technologies provides the possibility for the development of the new parcel express carbody. Firstly the paper has a briefly description about box wagon’s history of domestic from early years of the new nation to this century, and analyses the characteristics of some current primary freight wagons. Furthermore the paper gives an introduction on the development of foreign box wagon, and finds out the problems of unreasonable transport mode and the waste of transport capacity which caused by the lack of special purpose freight wagon.The Safety and reliability of carbody are important manifestation of the train running performance. The increase of speed and other elements have a great influence on the structural strength of carbody. So it is necessary to make calculation and analysis about static intensity of the new-manufactured carbody. Under the above-mentioned background, the paper studies the new parcel express carbody. Based on the two-dimensional engineering drawings which provided by the manufacturer, using ANSYS software to calculate and analyze. The paper makes a detail introduction of the basic Principle of FEM and its general problem-solving steps. Then simplifying the car body reasonable, and using the ANSYS software to establish three-dimensional geometry model. Finally the finite element model is established by meshing the geometry model. Since our country’s now-existing intensity standard tend to be conservative, so the paper references different design standards to calculate and analyze the model car, pay attention to the similarities and differences between the TB/T1335-1996, EN12663-2:2010, and list the value and imposed location of longitudinal load and vertical load, the paper calculates and analyzes the model car in different conditions of longitudinal and vertical load combination case, lifting case static and loads at interfaces case. The stress and deformation distribution of the carbody are analyzed and evaluated, Then the forth strength theory and deflection-span ratio are used to assess the structural static strength and stiffness. Based on the modal analysis theory, the carbody structure mode characteristic of the carbody is extensively analyzed. Finally results show that:the improved carbody strength and stiffness meet the standard requirements which demonstrate the design is reasonable. |
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