直线感应电动机数据采集系统

针对用于磁悬浮列车的直线感应电动机实验台,介绍了一套对直线感应电动机实验数据进行采集、分析和处理的数据采集系统。该系统可对实验中的各种数据进行实时采集、显示、控制、存储和分析。     

EMS型磁悬浮列车运行阻力计算

就传统的轮机列车和ＥＭＳ型磁悬浮列车运行时所受到的阻力进行了简要分析，着重计算了ＥＭＳ型磁悬浮列车的电磁阻力，并提出了青城山试验示范线磁悬浮列车对直线电机驱动功率的要求。     

Impacts of motor vehicle operation on water quality in the US – Cleanup costs and policies

This paper investigates the costs of controlling some of the environmental impacts of motor vehicle transportation on groundwater and on surface waters. We estimate that annualized costs of cleaning-up leaking underground storage tanks range from $0.8 billion to $2.1 billion per year over 10 years. Annualized costs of controlling highway runoff from principal arterials in the US are much larger: they range from $2.9 billion to $15.6 billion per year over 20 years (1.6–8.3% of annualized highway transportation expenditures). Some causes of non-point source pollution were unintentionally created by regulations or could be addressed by simple design changes of motor vehicles. A review of applicable measures suggests that effective policies should combine economic incentives, information campaigns, and enforcement, coupled with preventive environmental measures. In general, preventing water pollution from motor vehicles would be much cheaper than cleaning it up.     

计重收费条件下高速公路用重型车特征分析

以山西为例分析了计重收费对重型车的影响,通过适当经济手段消除车辆超限超载运输,既保护了公路桥梁,又保障了交通安全,进而促进交通事业的健康发展。     

尾气加热式水暖系统在城市客车上的应展

简述了城市客车尾气加热式水暖系统的特点、工作原理，提出在设计过程中的注意事项。     

The design of bus route systems — An interactive location-allocation approach

An interactive modelling approach is developed to solve the practical problem of bus route network design. Possible bus routes are identified with facilities which can be located. Zones or pairs of zones in the urban area are identified with customers who will be allocated to the established facilities. It is shown that the classical Set Covering Problem is useful under the assumption of fixed demand; the Simple Plant Location Problem is effective under the assumption of demand which is sensitive to the level of bus service provided.     

走行轮垂向刚度对跨座式单轨车辆曲线通过性能的影响

考虑到跨座式单轨车辆通过曲线时主要靠导向轮来导向,导向轮径向力大小是评价单轨车辆曲线通过性能的一个重要指标。运用多体动力学仿真分析软件ADAMS建立单轨车辆仿真模型。在轨道半径和超高都不变的情况下,车辆以恒定的速度运行,通过改变走行轮垂向刚度的大小来分析导向轮所受径向力情况以及对车辆曲线通过性能的影响。单轨车辆仿真分析研究表明,走行轮垂向刚度的大小对车辆的曲线通过性能有很大影响。     

地铁车辆空气弹簧气压负载特性的分析与实验

针对目前地铁车辆称质量过程中检测的车辆质量与实际载质量存在较大误差的问题,通过对地铁车辆称质量过程进行分析,分别推导了空气弹簧的静态、动态气压-负载关系式,其中动态气压-负载曲线考虑了空气弹簧工作过程中的充、排气过程。以北京地铁大兴线4号线065车体为例,分别采用静态和动态气压-负载特性曲线对车体质量进行计算,通过与真实车体质量对比,表明本文推导的动态气压-负载特性曲线更加接近于实际情况,可以大幅减小地铁车辆称质量误差。     

上海轨道交通11号线北段车辆的工业设计研究

分析了上海轨道交通11号线北段车辆的定位,从区域文化和线路特征提出"F1运动"和"玉兰花"两种意境相结合的工业设计解决方案。结合计算机辅助设计的手段对创意理念进行演绎和研究,提炼出整个设计流程和创意的方法,为车辆工业设计的发展提供借鉴。     

800kW直流电机温升超标的原因分析及改善

文章分析了800 kW直流电机在电机试验中温升超标的原因,提出该电机的设计改进方案及严格的制造工艺要求。使该电机在运行过程中热损耗降低,散热回路得到合理改善,电机温升得到控制,满足了电机设计及运行可靠性要求。