面向磨耗控制的高速铁路轮轨型面优化研究

One of the primary problems associated with the safety and maitenance of high-speed vehicles in operation is wheel-rail wear.How to extend the re-profiling period of wheel has been now an issue needed urgently to address in China. The main objective of this project is to study the optimal geometrical profiles for wheels of high-speed vehicles in order to control wheel-rail wear. This will be done by using combined methods of on-site tracking measurement, theoretical analysis, numerical simulation and experimentations. Firstly, we shall characterise the physical processes of wheel-rail wear by tracking measurement of high-speed wheel-rail rolling contact surface status. And from these measurments, the geometric parameters of worn wheel/rail which are sensitive to the vehicle dynamic behavior will be elucidated by vehicle dynamics modelling and numerical simulations.Then, the principle, theory and method for optimal matching design of the wheel/rail profile are explored to control wear during the whole service period.Based on the above principle,theory and method, the individual wheel profiles and the re-profiling shapes of the wheel are designed to prolong the re-profiling period.The newly-designed wheel profiles will be validated through roller rig test and field test. The outcomes of this project are of theoretical and practical value for the indepth study of high speed train of China and the proposal for reasonable and effective maintenance standard.

轮轨磨耗是目前影响我国高速列车安全平稳运营和维修成本的主要问题之一。如何延长车轮镟修周期已成为亟待解决的课题。本项目拟通过现场跟踪、理论分析、数值模拟和试验的手段，以控制轮轨磨耗为目标，开展高速轮轨几何型面优化研究。首先在长期跟踪测试目前我国高速列车轮轨磨耗状态的基础上，掌握高速轮轨磨耗特征和规律，通过建立高速列车动力学模型及数值模拟，找出对车辆动力学性能影响较敏感的轮轨磨耗几何参数。在此基础上，寻求面向整个服役期高速轮轨磨耗控制的轮轨匹配优化设计原则、理论和方法，设计出个性化的高速车轮踏面外形和镟修外形，并通过室内滚振试验和现场试验来验证，有效延长车轮镟修周期。本项目将对我国高速列车的深入研究和合理有效的维修规范与措施的提出具有重要的理论意义和工程应用价值。

轮轨磨耗是目前影响我国高速列车安全平稳运营和维修成本的主要问题之一。如何延长车轮镟修周期已成为亟待解决的难题。本项目的主要工作包括：1）对目前我国高速列车轮轨磨耗状态进行了长期跟踪测试，掌握了轮轨磨耗特征和发展规律。2）基于建立的高速列车动力学分析模型，分析了车轮磨耗对车辆动力学性能的影响，明确了对车辆动力学影响较为敏感的轮轨磨耗几何参数。3）发展了可以兼顾车轮整个服役期内轮轨动态匹配关系的车轮踏面优化设计方法。4）设计了系列高速车轮经济镟修型面，延长车轮使用寿命。5）成功设计了时速350公里中国标准动车组车轮踏面外形，通过室内滚动台和现场试验对新设计踏面进行了验证。.项目执行期间，共发表论文11篇，其中SCI论文2篇，EI论文5篇。已授权实用新型专利1项，申请发明专利2项。参加国际会议共9人次，其中口头报告9次，参加国内会议3人次。共培养已毕业博士2人，硕士3人，博士后1人，在读博士和硕士研究生3人。