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尽可能地改善机车通过曲线性能，达到机车适应线路的目的，是当今铁路科技发展的重要方向之一。以韶山_7型机车为例,对B_0-B_0-B_0轴式机车加装横向连接装置与否两种情况作了稳态曲线通过和动态曲线通过计算。通过对衡量机车曲线通过性能和安全性指标（导向力、冲角、轮缘磨耗数和脱轨系数）的计算分析，论证了在韶山_7型机车上加装横向连接装置是进一步提高该型机车曲线通过性能和安全的最佳选择。
As far as possible to improve locomotive performance through the curve to achieve the purpose of locomotives to adapt to the line, is an important direction of today’s railway science and technology development. Taking Shaoshan _7 locomotive as an example, the steady-state curve is passed and the dynamic curve is adopted to calculate whether the horizontal linkage of B_0-B_0-B_0 locomotive is installed or not. Through the calculation and analysis of the locomotive curve passing performance and safety index (steering force, angle of attack, wheel rim wear number and derailment coefficient), it is demonstrated that the installation of transverse connecting device on Shaoshan _7 locomotive is to further improve the locomotive Curves are the best choice for performance and safety.