铁路客运段信息化综合管理系统

根据我国铁路客运段的现状,集成基于GSM-R的无线移动售/补票子系统、车长办公子系统、餐车管理子系统、列车GPS定位与自动语音播报子系统、列车移动视频监控子系统五大车载系统,构建客运段信息化综合管理系统。在客运段建立集成平台,统一数据接口,规范客运业务,提供WEB查询服务,并对其中的两个关键子系统给出实现方案。铁路客运段信息化综合管理系统已在武汉铁路局下属客运段实际运行,取得了良好效果。     

交直传动相控电力机车过电压保护参数的合理匹配

交直电力机车分别在牵引绕组和整流器元件设置阻容吸收电路以降低操作过电压和换流过电压，探讨了二者在整流器工作过程中的相互作用与影响，当参数选配不当，会造成二极管关断损坏和晶闸管开通损坏，阻容器件也会出现烧损故障；指出当前运用机车普遍存在绕组阻容参数失配情况，以致晶闸管故障率高，阻容器件烧损严重，提出满足各种机车过压保护的优化调整方案。     

斜坡平台地形上波浪沿程变化的数值分析

采用波浪通过任意形状岸滩时波高变化的计算模型,分析波浪在斜坡平台上的沿程变化。计算结果表明该模型能够较好地估算斜坡平台地形上波高及波浪增减水的沿程变化。     

牵引模式对C0-C0架悬式机车粘着性能的影响

分析了牵引模式对C0-C0架悬式机车粘着性能的影响.通过对牵引装置不同布置方式进行比较,指出机车的轴重转移量以车体中央截面成对称分布,对应轮对上的粘着质量利用率之和为定值;并提出牵引点高度对机车粘着性能影响较大,而牵引装置布置方式对其影响较小,机车设计时需根据悬挂特性选择合适的牵引点高度.     

基于Autodesk平台的山区隧道BIM应用研究

为有效解决隧道建模标准化、三维实体精确化、施工管理信息化等问题，以邹平县广富隧道为例、Autodesk平台为基础，根据设计图纸内容对隧道整体结构进行细分，形成一套成熟的隧道建模规则命名体系。采用Civil 3D+Dynamo+Revit软件交互实施体系，实现对隧道建模的精细控制；采用中建八局BIM协同管理平台对施工全过程进行信息化管理，该平台优势在于以Autodesk平台精细模型的各构件为信息源，并以此为选择基础，提出对项目生产、质量、安全、设计、资料等的全方位管理；同时，模型、资料、审批信息等内容相互关联，真正实现工程资料闭合。     

抗冰海洋平台的全寿命优化设计I-理论与模型

文章基于投资—效益准则,建立了抗冰平台全寿命总费用最小的优化设计模型;考虑了多种类型的性能要求(结构、设备、人员),并建立了相关判据;提出了包括结构的初始费用、维修费用和期望损失费用的冰区海洋平台全寿命总费用评估模型;提出了平台结构主要功能的确定及描述方法、相应的功能失效损失值估计模型。     

Theoretical and experimental excitation force spectra for railway-induced ground vibration: vehicle–track–soil interaction,irregularities and soil measurements

Excitation force spectra are necessary for a realistic prediction of railway-induced ground vibration. The excitation forces cause the ground vibration and they are themselves a result of irregularities passed by the train. The methods of the related analyses – the wavenumber integration for the wave propagation in homogeneous or layered soils, the combined finite-element boundary-element method for the vehicle–track–soil interaction – have already been presented and are the base for the advanced topic of this contribution. This contribution determines excitation force spectra of railway traffic by two completely different methods. The forward analysis starts with vehicle, track and soil irregularities, which are taken from literature and axle-box measurements, calculates the vehicle–track interaction and gets theoretical force spectra as the result. The second method is a backward analysis from the measured ground vibration of railway traffic. A calculated or measured transfer function of the soil is used to determine the excitation force spectrum of the train. A number of measurements of different soils and different trains with different speeds are analysed in that way. Forward and backward analysis yield the same approximate force spectra with values around 1 kN for each axle and third of octave.     

垃圾转运车后门液压系统故障分析

针对在实际生产过程中出现的垃圾转运车后门不能举升和下降的故障现象,通过对液压系统原理图的分析和借助适当的检测工具,按照由简单到复杂的原则,逐一排查可能引起故障的原因,使故障得以快速解决,并提供了一种对故障原因进行分析的思路。     

Experimental study of the airside performance for interrupted fin-and-tube heat exchanger with hydrophilic coating under dehumidifying conditions

The airside heat transfer and friction characteristics of seven interrupted fin-and-tube heat exchangers with hydrophilic coating under dehumidifying conditions are experimented. The effects of number of tube rows, fin pitch and inlet relative humidity on airside performance are analyzed. The test results show that the influence of fin pitch on the friction characteristic under dehumidifying conditions is similar to that under dry surface, and the friction factors decrease slightly with the increase of number of tube rows. The heat transfer performance decreases as fin pitch and number of tube rows increases. The heat transfer performance and the friction characteristic are independent of inlet relative humidity. Based on the test results, heat transfer and friction correlations in terms of the Colburn j factor and Fanning f factor, are proposed to describe the airside performance of the interrupted fin geometry with hydrophilic coating under dehumidifying conditions. The correlation of the Colburn j factor gives a mean deviation of 9.7%, while the correlation of the Fanning f factor shows a mean deviation of 7.3%.