时速160km以下双层集装箱运输铁路有砟轨道隧道内轮廓研究

目前运营时速160 km以下(双箱运输)有砟轨道隧道内轮廓难以满足大型养护机械(特别是大型清筛机)作业空间需求,通过对新建时速160 km以下电气化铁路(双箱运输)有砟轨道隧道的建筑限界、接触网悬挂方式及布置、大型养护机械空间需求、轨道结构形式、侧沟及电缆槽设置等内轮廓影响因素进行综合分析,确定单双线铁路有砟轨道隧道内轮廓控制性尺寸、拟定内轮廓方案,通过对各型内轮廓方案的结构安全性、经济性及施工便利性比较,给出推荐方案,为通用图编制和纳入规范奠定基础。     

Prediction of wheel wear in urban railway transport: comparison of existing models

One of the most important maintenance costs in tramway transport comes from wear of wheel profiles. In the highly competitive railway market, the prediction of wear is then a major concern of the constructors. In this article, we present and compare four models well adapted to tramway conditions, involving contacts on the rolling tread and on the flange with very different sliding and pressure conditions. Moreover, all models can be implemented from the natural outputs of the railway simulation packages classically used in industry for the dynamics design of the vehicles. The first one, proposed by Jendel, is based on the well-known Archard's wear model. Enblom continues Jendel's approach by taking into account the contribution of wheel deformation on the sliding velocity. The last two models, developed by Zobory, and Pearce and Sherratt, determine the wear from the energy dissipation in the contact area. The models are first compared on a theoretical basis and, for that purpose, are rewritten in a common form. Two cases are distinguished: mild wear as arising on the rolling tread and severe wear as arising on the flange. The models are also compared in the practical case of an urban transport vehicle running on circular tracks with different curve radii. Although the models show equivalent trends according to the theoretical study, important discrepancies appear between estimated wear depths. All models are actually dependent on experimental coefficients and it is likely that they were estimated in different conditions. On the other hand, a reasonable agreement can be found in some particular conditions. As an example, Zobory's, Enblom's and Jendel's models are very close to each other in severe wear conditions. This work shows that a general and reliable model could probably be developed from all positive aspects of the existing ones.     

轨道交通综合枢纽规划探讨

结合上海、昆明、深圳等城市的轨道交通综合枢纽工程,对总平面布置、各种交通方式的衔接及客流组织等内容进行了探讨,特别对城市轨道交通车站与铁路站房的衔接进行了讨论,并对福田轨道交通枢纽设计案例进行了分析。     

港口与城市环境及资源的协调发展度研究

随着我国港口和城市建设的不断发展,在生态环境和资源利用方面港城间的矛盾日益明显,如何协调两者之间的发展已成为目前迫切需要解决的课题。为此,以大连市为例,从建立港城协调发展度模型入手,对港口与环境及资源之间协调的程度进行评判,从而为指导港口和城市的可持续发展提供了决策依据。     

浅谈滚装客船装车处所的固定式灭火系统

装车处所固定式灭火系统直接影响船舶航行安全。文章介绍了滚装客船装车处所固定式灭火系统的配备、各种常见固定式灭火系统的性能，提出了固定式灭火系统的检查要点及保证这些船舶消防设备正确操作和时刻处于良好使用状态的要求。     

客车空气弹簧悬架分析与研究

对空气弹簧悬架的发展进行了阐述,同时分析了空气弹簧悬架组成、结构、计算方法及空气弹簧悬架的关键技术.     

大吨位前支点挂篮百米高空拼装新技术

结合铁罗坪特大桥现场施工条件，打破常规挂篮拼装施工方法，采用空中拼装贝雷片托架平台，在平台上分段拼装前支点挂篮，作为现浇段的施工支架，然后拼装挂篮其他构件。该项技术可用于其它构件拼装施工中，供同类桥梁施工借鉴。     

浅谈铁路客运自动化

为旅客提供高效、优质的服务是铁路客运服务的最终目标。客运自动化系统具有及时、安全、资源共享和管控一体等优势,已成为车站客运信息系统的建设方向。分析了我国铁路客运信息系统的现状,阐述了铁路车站客运自动化建设的意义、目标和系统组成等。     

海上平台中央空调系统噪声分析和降噪方案研究

文章通过惠州21—1B平台中央空调系统测试和改进实践，对该系统的噪声进行了分析，并提出了相应的降噪方案。