JC型弹性旁承体安装时侧翼橡胶层应力分析

对目前货车转向架装用的JC型双作用弹性旁承体进行了非线性有限元计算,分析了旁承体两侧翼橡胶层在安装及工作时的应力,给出了JC型双作用弹性旁承体在安装时的相关建议。     

轴向组合式小径向/轴向刚度比橡胶球铰结构介绍

以一种地铁车辆用转臂定位节点为例,介绍了一种轴向组合式橡胶-金属球铰结构,此种结构的特点是径向/轴向刚度比小,橡胶预压缩简单可靠,刚度调节范围广,疲劳可靠性好.     

出口马达加斯加米轨转向架的研制

介绍了出口马达加斯加米轨转向架的主要技术参数、结构特点及有关计算和试验情况.     

主动导向转向架的多体动力学仿真与试验研究

对主动导向转向架的半车模型进行了多体动力学计算,并进行了滚动台试验,计算结果和试验结果基本一致。将半车模型扩展为整车模型后,进行了计算分析,研究结果表明,主动导向转向架可以大大提高转向架的曲线通过性能。     

轴承压装力-位移曲线作轴承压装合格判定的可行性分析

通过对影响货车滚动轴承压装力因素的分析,得出了轴承压装力与位移之间的数学关系,并依据353130B滚动轴承及RE2B轮对的结构尺寸,得出了353130B滚动轴承压装力与位移之间的理论曲线。根据现场轴承压装相关经验数据统计,对压装理论曲线的边界条件进行了分析,为采用压装力一位移曲线判定轴承压装质量方法进行了可行性分析。     

25DT“神州号”动车组空调漏水原因及措施

分析了25DT动车组空调机组漏水原因及现行规程存在的问题,提出了相关防护措施及改进建议.     

牵引变电所换相连接方式研究

针对石家庄西变电所施工改造中,2008年3月发生的变电所母线和变压器换相连接问题,利用理论和测试的方法进行了分析,找出了原因。同时结合运行和施工中其他2例换相故障,提出了几项切实可行的措施。     

Socially and environmentally appropriate urban futures for the motor car

In its relatively short life, the automobile has provided a level of mobility unlikely to have been feasible with a reliance on conventional forms of land based public transport. It has contributed in both a positive and negative way to the quality of life, transforming our cities, our way of life, and giving us a greater command over time and space. Concern over the undesirable social and environmental impacts has increased over time, with calls for governments to take action to reduce the automobile's dominant role. New investment in fixed-track public transport and bus priority systems together with strategies to discourage travel have been proposed to improve accessibility and to aid in cleaning up the physical environment. This paper reviews some of the issues facing society as it works to identify policies to achieve an economically and environmentally sustainabie future. There is a need for a broader set of policies to facilitate alternative land use-transport lifestyles while facing appropriate pricing signals. Some of the key issues are adjustments in the relative prices of location and transport, spatial incentives to make public transport economically viable (i.e. changing urban densities, zoning/incentive changes to allow more infill), road pricing (i.e. charging cars the economic cost of using the roads), new information technology systems (e.g. IVHS) to improve the efficiency and effectiveness of transport infrastructure, major improvements in the fuel efficiency of fossil fuelled vehicles, and alternative-fuelled vehicles (clean-air vehicles).     

城市轨道交通综合监控系统中时间表控制功能的应用

在城市轨道交通综合监控系统中,时间表控制功能可以按照预先指定的时间条件自动地进行设备控制,保证设备按照精确的时间进行起停,减少了各级调度员的工作量,降低了人为控制的出错概率.时间表控制能按工作日、周末、节假日采取不同的设备控制策略,也能按设备控制要求进行单次控制或者一定时间内指定时间间隔的多次控制.该功能已成功应用于成都地铁1号线的综合监控系统中.     

激光堆焊工艺在修造领域的应用现状及发展趋势

本文详细阐述了激光堆焊工艺在工业修造领域的应用现状及发展趋势,介绍了激光束的能源、输送和聚焦系统、堆焊材料及激光设备。重点说明了其在修造领域的应用工艺。