单线铁路旅客列车开行能力的研究

单线铁路区段，旅客列车的行车密度与其旅行速度之间有着密切的联系，对单线铁路旅客列车会车，越行方式和旅行速度进行了深入的分析与研究，找到了列车旅行速度和列车开行密度变化的一般规律，最后通过对渝怀线的计算机模拟计算，得出了渝怀线旅客列车开行数量的合理范围，对旅客列车合理开行数量的研究提供了可行的理论借鉴。     

准高速客车轴承滚子对数母线无心超精成形技术

利用贯穿式超精原理，实现了准高速客车在滚子的对数母线修形，加工出的滚子达到设计要求。     

西安至平凉线永寿梁越岭地区综合线路方案研究

结合新建铁路西安至平凉线永寿梁越岭地区线路方案研究工程实践,针对新建铁路西安至平凉线黄土沟谷纵横、强烈下切、岸坡坍塌、陷穴分布广、且多呈坡陡谷深的黄土"V"形谷的特殊地形条件,以及以黄土滑坡为主的不良地质广为分布、规模大、危害重的特殊地质条件,首先根据线路基本走向和主要技术标准,在进行大面积区域地质调查和地质勘探基础上,结合区域内自然特征、环境敏感点等,选择合理的越岭垭口;在此基础上,结合地形、地质条件,系统、全面分析控制线路方案的主要因素,从线路技术条件、越岭主隧道长度及工程施工条件、工程可靠性及环境影响、工程经济性等多方面比选,选择合理的越岭隧道方案。     

地面自动过分相系统列车位置检测及智能复原技术

通过地面自动过分相系统与车载自动过分相系统差异性分析,提出地面自动过分相系统配置、冗余设置、智能复原技术,详细介绍了冗余配置点功能及智能复原关键技术。     

超车视距设计中的风险评价

通过计算机仿真软件ARENA模拟双向2车道路段上不同的超车视距长度下的超车行为,并建立风险指标。风险指标主要根据超车动作结束时,超越车与对向车辆问的最短时间距离。共确定了6个风险等级,用于评价不同设计时速下的各种超车视距长度的风险。     

数学回归法在大孔隙沥青混合料级配设计中的应用

透水型沥青路面(OGFC)是一种具有连通空隙的开级配沥青路面材料,具有排水、降噪等良好的功能性.大孔隙沥青混合料的空隙率直接影响到沥青混合料的路用性能和功能性能,而控制OGFC空隙率主要靠确定合理的关键筛孔通过率,但是对于二点通过率与空隙率的具体关系尚无深入研究.文中采用二元线性回归找出OGFC-13的2个关键筛孔通过率与空隙率的关系.研究表明,2.36 mm和4.75 mm两个关键筛孔与OGFC混合料空隙率有很好的线性关系.     

A study on the resistance force and the aerodynamic drag of Korean high-speed trains

The resistance force as well as the aerodynamic drag of Korean high-speed trains including two commercial trains, the KTX and the KTX-Sancheon (KTX-II) and two experimental trains, the HSR-350X and the HEMU-430X have been studied comprehensively. To deduce the aerodynamic drag of the trains, the coefficients of the Davis equation, which is a universal formulation to represent the resistance to motion of the train, have been calculated using the coasting test method and analysed in comparison with those by empirical prediction methods. In case of HEMU-430X train, the equations of resistance to motion have been calculated by an alternative regression method that is established in this study. The results show that the suggested method can successively yield the resistance to motion equation from the coasting test measurements with varying air density by separating the aerodynamic drag from the total resistance of train. It also prevents from improper coefficients which are occasionally taken by normal regression method in irregular coasting condition. After yielding the aerodynamic drag of the trains from the resistance to motion equations, characteristics of the aerodynamic drag have been analysed and compared between the trains.     

城轨列车走行部地面检测系统研究与设计

走行部作为城轨列车的关键部件,其服役状态对列车运行安全起着至关重要的作用.目前,中国城轨列车走行部实时监测系统尚在起步阶段,且多数集中在轴箱监测,监测功能单一.研究并设计一套城轨列车走行部地面检测系统,针对轮对尺寸、车底关键部件异常及轴箱、电机等部件温度异常具有检测报警功能,此外还具备系统自检、自动防护、测轴计速和车号...     

Structural analysis of 3D high-speed train–bridge interactions for simple train load models

Three-dimensional models are developed for analysing the dynamic interaction that occurs between high-speed trains and bridges. The reliability and accuracy of developed models are verified by comparing the results from analysing field tests on high-speed trains. A number of train load models are proposed and their performances are compared in order to identify possible models that would reduce the computational and modelling efforts while maintaining suitable accuracy. The results show that at least 16 cars out of a 20-car train should be modelled to achieve results that are comparable to those obtained using the highly detailed 20-car model. Regarding the simplified train load model, more accurate results are obtained employing the 3D moving vehicle model for power cars, the heaviest cars of a high-speed trainset, and a moving force model for other cars, power passenger cars, and passenger cars, compared with highly detailed 20-car model.