摘要：研究目的：以京沪高铁廊坊段CRTSⅡ型板式无砟轨道路涵过渡段为背景，采用Abaqus数值分析软件 建立车辆-轨道-过渡段动力系统耦合模型，研究不同因素对列车通过路涵过渡段时运行安全性及平稳性 的影响。根据极差和方差分析方法，确定影响列车运行安全性及平稳性的因素重要性次序，提出高速铁路路 涵过渡段最佳设计方案。 研究结论：(1)以横向力或线路横向稳定性系数为试验指标优化时，过渡段方式为第一影响因素；以车轮 脱轨系数、轮重减载率或Sperling舒适度指标为试验指标优化时，行车速度为第一影响因素；以垂向加速度为 试验指标优化时，填土厚度为第一影响因素；（2)建议在路涵过渡段设计时采用倒梯形过渡、过渡段长度 25 m、涵洞跨径2 m、填土厚度4 m、行车速度330 km/h的方案，能使列车运行安全性及平稳性达到最优状态； (3 )该研究成果可为其他高速铁路路涵过渡段的设计提供借鉴。

Abstract：Research purposes： With the road - culvert transition section of Beijing - Shanghai high - speed railway Langang section CRTS Ⅱ type slab track as the background，by numerical analysis software Abaqus the coupling model of vehicle - track - transition section is established，the different factors to the safety and comfort of road - culvert transition section are studied. According to the range analysis and variance analysis method，the importance order of the factors affecting the train running safety and comfort is determined， the design of optimal transition section is put forward. Research conclusions：(1) With the maximum absolute value or the line lateral stability coefficient for optimization of test index，the way of transition section is the first influence factor； With wheel derailment coefficient，reducing load rate，and Sperling comfort as the test index optimization， driving speed is the first influence factor； With vertical acceleration as the test index optimization，filling thickness is the first factor. ( 2 ) It is recommended that in the design of road - culvert transition section adopting the scheme of inverted trapezoidal transition， transition section length 25 m， span length 2 m，filling thickness 4 m and speed 330 km/h，can make the train running safety and comfort and achieve optimal state. ( 3 ) The research results can provide a reference for the design of the other high - speed rail road culvert transition section.