神华集团铁路运输信息化建设研究

拥有神朔、朔黄、包神、大准、黄万等五条总运营里程为1367km、运能为415百万t的自有铁路线,拥有2.43万辆载重车辆的神华集团铁路运输系统,面对蓬勃发展的信息化浪潮,该如何应对呢?本文就是针对神华集团铁路运输系统的信息化建设现状及其面临的形势与问题,对其信息化建设现状进行了深入地分析、研究。提出了神华集团铁路运输系统的信息化建设的方向和道路。指出了神华集团铁路运输系统的信息化建设必将从自动化、网络化逐步走向集成化,进而发展为现代物流业下的电子商务,这一必由之路。并以此为思路,探讨了神华集团铁路运输系统信息化建设的对策和步骤。     

Service‐based high‐speed railway base station arrangement

To provide stable and high data rate wireless access for passengers in the train, it is necessary to properly deploy base stations along the railway. We consider this issue from the perspective of service, which is defined as the integral of the time‐varying instantaneous channel capacity. With large‐scale fading assumption, it will be shown that the total service of each base station is inversely proportional to the velocity of the train. Besides, we find that if the ratio of the service provided by a base station in its service region to its total service is given, the base station interval (i.e., the distance between two adjacent base stations) is a constant regardless of the velocity of the train. On the other hand, if a certain amount of service is required, the interval will increase with the velocity of the train. The aforementioned results apply not only to simple curve rails, like line rail and arc rail, but also to any irregular curve rail, provided that the train is traveling at a constant velocity. Furthermore, the new developed results are applied to analyze the on–off transmission strategy of base stations. Copyright © 2013 John Wiley & Sons, Ltd.     

矿区专用铁路开采沉陷预计及治理系统研究

在矿区铁路下进行放顶煤开采所引起的地表及铁路的变形量大，变形速度快，从而导致矿区铁路维护困难。如果在开采前及开采过程中对地表及铁路的变形预计不准确，维修措施不当，将无法保证矿区铁路的正常运输，甚至出现安全行车事故。为此，研究开发了综采放顶煤条件下铁路开采沉陷预计及其治理系统，该系统通过对地表及铁路的变形进行较为准确的预计，可提出铁路线路及道岔的维修治理措施。     

AEI技术及其在铁路上的应用

重点介绍微波反射技术在铁路运输中的应用,介绍了铁路车号车次自动识别系统的具体技术实现方式。指出该技术既能满足铁路运输复杂的运输环境的要求,又能最大限度压缩建设成本,是提高铁路运输能力和实现行车指挥自动化所不可缺少的技术。     

新型高聚物复合材料轨枕的成型技术研究

利用废弃高聚物以及化工厂生产磷酸时的副产品废磷石膏为原料,采用双阶挤出机——行星挤出机结合单螺杆挤出机制备新型高聚物复合材料轨枕,研究了复合材料中不同废磷石膏含量对轨枕力学性能的影响;探讨了挤出机转速配比、加工温度、阻尼器设置等工艺参数对材料挤出成型的影响;并且利用ANSYS软件对模具流道冷却进行了模拟分析。     

石英二长岩全风化物作为高铁填料的试验研究

通过对镇江一带分布的石英二长岩全风化物物理改良前后的室内物理、力学试验及现场填筑试验,对其作为填料的工程性质进行了系统的研究,结果表明,石英二长岩全风化物具有良好的可压实性,但力学性质受浸水的影响明显,在掺入一定粗粒料进行物理改良后,力学性质有明显改善,可用作高速铁路路堤基床底层填料。     

同煤铁路电务维修如何适应铁路跨越式发展

针对现行维修体制的弊端,就如何实现维护管理由制约型向适应型转变,如何将维修方式由计划修向状态修转变进行了阐述。     

Use of Modelica language to simulate electrified railway lines and trains

Simulation of multi-engineering systems typically requires many issues to be solved, which are to be addressed by developing appropriate modeling and simulation programming techniques. In the last years, the authors have participated in several studies in which they analyzed in detail electrified railway systems and simulated them using Modelica language. After a few years of study, despite the huge complexity of these systems, it has appeared evident that Modelica language is very well suited and able to effectively solve the typical issues they present. While specific railway system simulations have already been discussed in specific papers, whose focus was on application and actual results, in this paper, the authors show how to use Modelica language to solve specific modeling issues through suitable programming techniques. Moreover, the issues to be solved and the conceived techniques may be interpreted in a general way and to be applied also in different engineering domains. Finally, this paper briefly recalls the principal results obtained in previous specific papers, in which these techniques were fully implemented.     

火车车轮S形辐板成形研究

借助商业有限元软件MSC/Superform,数值模拟了车轮压弯成形过程。研究了车轮S形辐板成形过程金属流动规律,得到了S形辐板截面变形分布,为S形辐板车轮成形工艺设计提供依据。     

轨道结构参数对地铁引起地面环境振动特性的影响分析

分别采用有限元和现场试验方法,研究了在短波不平顺条件下,轨道结构参数变化对地铁列车引起地面环境振动特性的影响。结果表明:地铁列车引起的地面环境振动总体上由波长为0.3~1.0 m的短波不平顺所引起,减小扣件刚度和增大轨枕质量可以分别在50~100 Hz和30~100 Hz范围内减小地面振动水平,减小道床支承刚度可在20~100 Hz范围内有效减小地面环境振动水平约13.5 dB,但会导致地面环境振动水平在某些频率上出现增大。