In order to improve the running performance of variable-gauge trains when working on different gauge lines, a PCA assigned signal-to-noise ratio-based method is used to optimize the suspension parameters. It established the dynamic simulation model of 1 435/1 520 mm high-speed variable-gauge train based on SIMPACK. The key suspension parameters were selected by parameter test method Pareto diagram. Based on the optimal Latin hypercube design method, 200 groups of key suspension parameters were selected for simulation test. The signal-to-noise ratio is used to analyze the dynamic performance. Assigning the weights of various dynamic indicators through principal component analysis, and obtain the optimized values of key suspension parameters for variable-gauge trains under two different gauge combinations. The results of parameter optimization are tested and verified, which show that the dynamic performance of the optimized suspension parameters on the two gauges meets the standard requirements, and the vehicle has better dynamic performance.
本文所研究的变轨距列车能适应1 435 mm/1 520 mm 的轨距变换,车辆在完成轨距变换后行驶在新的轨距轨面上,不同钢轨轨面与轮对踏面接触产生不同的轮轨接触关系。为模拟变轨前后的轮轨关系,本文参考文献[23]优选变轨距列车的车轮踏面类型为LMA踏面,在1 435 mm 轨距下,轮轨关系采用LMA型踏面与我国CN60钢轨配合,轨底坡 1:40;在 1 520 mm 轨距下,轮轨关系采用LMA 型踏面与俄罗斯P65钢轨配合,轨底坡1:20。
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