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介绍了CKD7型机车车架结构设计结构特点，以及如何依据机车总体布置要求和车架结构设计时应考虑的各种因素来确定车架结构布置及车架横截面型式和主要尺寸。为了减轻车架重量，应用了结构的优化设计，使车架结构满足设计要求。
This paper introduces the structural characteristics of CKD7 locomotive frame structure and how to determine the frame structure layout and frame cross-section type and main dimensions according to the overall locomotive layout requirements and various factors that should be considered when designing the frame structure. In order to reduce the frame weight, the optimized design of the structure is applied so that the frame structure can meet the design requirements.