小半径曲线钢轨非对称打磨廓形设计方法 李立.pdf

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交通运输工程，提出了一种针对小半径曲线钢轨非对称打磨廓形的
多目标数值优化模型；基于差分进化算法编写了相应的数值计算程序，并选择合理的计算参数求
解了优化模型；根据实际线路参数分析了优化后钢轨打磨廓形的轮轨接触几何特性，并验证了列
车的小半径曲线动力学性能。研究结果表明：提出的优化方法具有较快的计算速度，优化模型仅
迭代了 97 次即可获得理想的钢轨打磨廓形；非对称打磨使内外钢轨具有差异性的打磨位置与打
磨深度，将轮轨对中位置向轨道内侧移动了约 10 mm，且不会改变轮缘处的轮轨匹配特性，有效
增大了轮对横移 10 mm 范围内的轮对滚动圆半径差与轮轨接触角差，降低了列车在通过小半径曲
线时的轮对横移、轮轨横向力、脱轨系数和轮重减载率，提高了转向架的横向稳定性和轮轨磨耗
性能；虽然该打磨方式获得的钢轨廓形增大了轮轨接触应力，但并不会引起轮轨塑性变形。由此
可见，该设计方法为提高列车的中小半径曲线通过能力提供了一种可行途径。
关键词：车辆工程；钢轨廓形；车辆系统动力学；小半径曲线；非对称打磨；多目标优化
中图分类号： 文献标志码：A
Design method for asymmetric grinding profile of rail in sharp curve
LI Li, PENG Jing-kang, CUI Da-bin, LEI Peng-cheng
(School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
Abstract: In order to design a rail asymmetric grinding target profile which can improve the
performance of trains passing through sharp curve, the geometric derivation of the existing CN60 rail
profile in China is carried out, the rail profile geometric parameters are used as design variables, the
index of vehicle system multi-body dynamics is used as the comprehensive objective function, and the
rail grinding constraints are considered, a multi-objective numerical optimization model of asymmetric
grinding profile of rail in sharp curve is proposed. Based on the differential evolution algorithm, the
corresponding numerical calculation program was written, and reasonable calculation parameters were
selected to solve the optimization model. According to the actual line parameters, the wheel-rail contact