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中文摘要：
结合我国铁路货车现状，按照变轨距轮对结构特点设计出3种变轨距货车转向架初步方案。从结构和动力学性能两方面对这3种方案进行选型分析，结果表明变轨距货车转向架采用H形整体焊接构架式方案优于另外两种方案。根据方案对转向架各零部件进行设计，确定出了变轨距货车转向架的具体结构形式和技术参数。
英文摘要：
With the actuality of Chinese railway freight car, three types of the gauge - changeable bogie projects for freight car were put forward according to the characteristic of the gauge - changeable wheelsets. Compared with their structures and dynamic performance, type selection was made among three projects.The result indicates that the gauge - changeable bogie with ＂H＂ type of whole welded frame is better than the others, qhe all parts of the bogie were designed and the concrete structural details and technical parameters were confirmed for the gauge- changeable bogie.
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