加强线网规划 突出轨道交通在城市发展中的骨干地位

通过对线网规划在线网形态、线网规模、线路敷设方式、资源共享等方面的阐述 ,提出只有在科学规划指导下建设的轨道交通才能有效解决城市交通问题 ,引导城市良性发展。     

无碴轨道综合接地系统方案的探讨

随着无碴轨道在客运专线上的大量采用，钢轨对大地的漏泄电阻值将会有较大提高，为防止钢轨电位急剧升高引起人身设备安全问题，相关专业应加强综合接地系统工程的探讨研究。     

高速铁路跨区间无缝线路铺轨机组研制商榷

简要介绍国内外现有无缝线路铺轨机组现状 ,重点阐述进行高速铁路跨区间无缝线路铺轨机组研制应注意的几个方面     

加强曲线养护 提高轨道动态质量

利用轨道检查车检查轨道病害 ,指导线路维修作业 ,评价轨道动态质量 ,是实现轨道科学管理的重要方法。结合轨检车对曲线的评价指标 ,对铁路曲线病害产生的原因进行分析 ,并提出相应对策。     

高速列车与桥上板式轨道动力学仿真分析

运用轮轨关系,建立高速列车—板式轨道—桥梁系统空间耦合动力学模型。运用列车—线路—桥梁动力学仿真通用软件TTBSIM,分析高速列车以不同速度通过桥梁时,机车车辆、板式轨道及桥梁的动力特性。结果表明,桥上板式轨道能够保证行车的安全性、舒适性和桥梁结构的安全性。     

Influence of the track quality and of the properties of the wheel–rail rolling contact on vehicle dynamics

This work describes an analytical approach to determine what degree of accuracy is required in the definition of the rail vehicle models used for dynamic simulations. This way it would be possible to know in advance how the results of simulations may be altered due to the existence of errors in the creation of rolling stock models, whilst also identifying their critical parameters. This would make it possible to maximise the time available to enhance dynamic analysis and focus efforts on factors that are strictly necessary. In particular, the parameters related both to the track quality and to the rolling contact were considered in this study. With this aim, a sensitivity analysis was performed to assess their influence on the vehicle dynamic behaviour. To do this, 72 dynamic simulations were performed modifying, one at a time, the track quality, the wheel–rail friction coefficient and the equivalent conicity of both new and worn wheels. Three values were assigned to each parameter, and two wear states were considered for each type of wheel, one for new wheels and another one for reprofiled wheels. After processing the results of these simulations, it was concluded that all the parameters considered show very high influence, though the friction coefficient shows the highest influence. Therefore, it is recommended to undertake any future simulation job with measured track geometry and track irregularities, measured wheel profiles and normative values of the wheel–rail friction coefficient.     

起常见25Hz轨道电路故障的分析和处理方法简

针对常见细铁屑短路绝缘节造成的25Hz轨道电路故障,进行理论分析,总结判断方法及处理程序,提出冷封胶封堵的方法,减少故障发生率,达到压缩故障延时的目的.     

简谈ZPW-2000A无绝缘移频轨道电路故障判断和处理方法

基于我国铁路区间广泛使用的ZPW-2000A无绝缘移频自动闭塞制式,提出快速判断方法及处理过程,及时解决运用过程中出现的常见设备故障,达到压缩故障延时的目的。     

铁路客运站到发线运用优化研究

详细分析客运站旅客列车到、发技术作业。把客运站到发线运用优化目标分解为方便旅客旅行、有利于保证行车作业安全与行车技术作业和有效地使用车站各种既有行车技术设备等三个子目标,并分别建立其优化模型。运用多目标规划理论与分枝定界法对模型进行求解。依据某大型双线通过式客运站的实际数据,应用优化模型进行到发线运用实例分析计算,计算所得方案的优化效果明显。     

小波变换及其在轨道检测中的应用

介绍小波变换的原理及其特点 ,列举其在轨道检测中的典型应用 ,并仿真分析垫层、道床刚度的变化对客车轴箱加速度的影响 ;同时 ,对如何选用小波函数和与其他技术相结合进行信号分析作了说明。