Railway vehicle dynamics is strongly affected by track irregularities, which can influence the safety and the running behaviour of the vehicle. The EN 13848-5:2017 standard provides the limits of track irregularities for standard track but does not states specific restrictions for switches and crossings. Furthermore, since turnouts have a limited length, their track geometric irregularities cannot be accurately described by stochastic functions usually adopted for railway vehicle dynamics simulations. Nevertheless, irregularities in railway turnouts, related to the non-uniform stiffness of the track support and to the variation of the rail profiles along the longitudinal direction should be considered in dynamic simulations, as they can generate large dynamic loads, strongly affecting the vehicle dynamics and running stability. The aim of the paper is to expand the Switches and Crossing benchmark exercise analysing the effect of several kinds of irregularity with different wavelengths and amplitudes on a complete turnout on the main quantities related to the vehicle dynamics. The influence of each defect on each quantity is estimated through a post-processing sensitivity analysis based on power spectral density calculation. This sensitivity analysis is hence used to combine different types of defects in order to detect irregularity combinations that could compromise running safety.

铁路车辆动力学受轨道不规则性的强烈影响，这会影响车辆的安全性和运行性能。EN 13848-5:2017 标准规定了标准轨道的轨道不规则性限制，但没有规定道岔和交叉路口的具体限制。此外，由于道岔的长度有限，其轨道几何不规则性不能用通常用于铁路车辆动力学仿真的随机函数来准确描述。然而，铁路道岔的不规则性，与轨道支撑的不均匀刚度和沿纵向的轨道轮廓变化有关，在动态模拟中应考虑，因为它们会产生大的动态载荷，强烈影响车辆动力学和运行稳定性。本文的目的是扩展开关和交叉基准练习，分析具有不同波长和振幅的几种不规则性对完整道岔对与车辆动力学相关的主要量的影响。通过基于功率谱密度计算的后处理灵敏度分析来估计每个缺陷对每个量的影响。因此，这种敏感性分析用于组合不同类型的缺陷，以检测可能危及运行安全的不规则组合。通过基于功率谱密度计算的后处理灵敏度分析来估计每个缺陷对每个量的影响。因此，这种敏感性分析用于组合不同类型的缺陷，以检测可能危及运行安全的不规则组合。通过基于功率谱密度计算的后处理灵敏度分析来估计每个缺陷对每个量的影响。因此，这种敏感性分析用于组合不同类型的缺陷，以检测可能危及运行安全的不规则组合。