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一、前言在铁道车辆设计中,为了减轻结构的重量,常常采用薄壁曲梁件,例如长大货物车凹底架、U型和曲梁式转向架的构架或侧架、高压弯曲油管等,就都是薄壁曲梁件。对于这些关系到车辆使用性能与运行安全的重要零部件,精确地计算其强度,无疑地是车辆设计中的一个重要问题。目前,国内在车辆设计中,常把这些薄壁曲梁当作直梁来计算。这样的计算,由于
I. INTRODUCTION In the design of railway vehicles, in order to reduce the weight of the structure, thin-walled curved beam members are often used, for example, the concave chassis of a long-haul cargo vehicle, the frame or side frame of a U-type and curved beam type bogie, , Are thin-walled curved beams. For these important components related to vehicle performance and operational safety, accurate calculation of their strength is undoubtedly an important issue in vehicle design. At present, the domestic vehicle design, often these thin-walled curved beam as a straight beam to calculate. Such calculation, due