制动摩擦材料导热性能试验及其选择

根据制动摩擦材料导热性能试验结果,提出了应提高闸片导热性能以减少制动盘热裂的观点,对时速180km以上列车用制动摩擦材料的选择进行了论述,并对其经济性进行了分析。     

模糊理论和投影法在水面舰艇平台能力评判中的应用

通过模糊数学理论和投影法，给出了在无约束的多目标决策条件下对水面舰艇平台能力指数的一般评判方法，以此方法对水面舰艇的平台能力进行优化比较。     

锚泊设备陆上性能测试系统的研制

在分析锚泊设备动静态综合性能及其性能试验所需的张力表现的基础上,提出了锚泊设备动静态张力负载仿真的策略。阐述了在陆地上通过模式控制的液压拖动系统仿真实际锚泊负载环境的途径,对系统的主要参数和结构布置进行了说明。锚泊设备陆上性能测试系统通过实时试验数据采集、仿真过程控制和在线性能分析等关键环节,实现了对锚泊设备的动静态性能的高效率的测试。     

P70型通用棚车的研制

介绍了P70型通用棚车的主要性能参数、结构尺寸、材料的选取以及试验情况。     

列车空气动力性能与流线型头部外形

采用数值计算、动模型试验、风洞试验、实车试验和理论分析等方法,研究列车流线型头部长度、宽度、高度及耦合外形对列车交会压力波、空气阻力和升力的影响,得到一系列理论关系式。研究结果表明:①增加列车流线型头部长度,可以有效地改善列车空气动力性能,列车交会压力波随流线型头部长度增加而呈对数减小,头车阻力、升力绝对值均随流线型头部长度的增加呈线性减小,尾车阻力与流线型头部长度呈二次幂减小;②流线型头部纵向对称面最大控制型线从外凸到内凹,列车空气阻力、空气升力和交会压力波基本不变,减小鼻尖部位过渡曲线的曲率半径可以有效降低列车交会压力波;③流线型头部俯视最大控制型线为方形时产生的交会压力波最小,尖梭形的头车空气阻力和升力绝对值较小;④减小列车空气阻力和降低列车交会压力波,既矛盾又统一,列车气动头部外形设计需要综合考虑各种因素。     

钢渣沥青混合料路用性能试验研究

为了探究不同钢渣骨料掺量下沥青混合料的路用性能,对AC-13C型钢渣沥青混合料在钢渣掺量分别为0%、30%、50%、70%和90%时采用传统马歇尔击实试验,按照体积法原理进行配合比设计,分析研究了不同钢渣掺量下沥青混合料的路用性能。结果表明:钢渣骨料表现为碱性,与沥青胶结料黏附性较好,随着钢渣掺量的增加,钢渣沥青混合料高温性能以及抗水损坏性能均表现出先增大后减小趋势,低温性能以及体积安定性逐渐降低,钢渣掺量在50%时沥青混合料路用性能相对最佳。     

钢桥面板顶板-纵肋连接接头的疲劳性能

对钢桥面板整体模型进行了有限元分析。结果表明,顶板横向应力在横桥向的分布表现出类似弹性支承多跨连续梁的受力特点,且顶板横向应力基本全部为弯曲应力,膜应力很小,在顶板-纵肋连接处纵肋应力远小于顶板横向应力。顶板-纵肋连接处的应力纵向和横向影响线很短,疲劳验算可不考虑同一车辆轴重间的相互影响及多车效应。增加顶板厚度可大大降低顶板的应力幅,铺装层的完整性对钢桥面板十分重要。此外,还对该类型接头的疲劳分级及现行欧洲规范Eurocode和美国规范AASHTO LRFD的相关条款进行了分析。为考虑车辆荷载通过引起的非成比例多轴疲劳效应,轮荷载滚动加载足尺模型试验和分析方法需要进一步深入研究。     

Cooperation in transit delivery in West German metropolitan areas

West Germany is densely populated, averaging 245 inhabitants/km², but varying widely between urban agglomerations and rural areas. Transport volume has increased by 40% since 1970, with virtually all growth due to private automobiles. Since 1981 public transit has been suffering from decreasing demand.A 1964 Expert's Report to the German federal government was the stimulus for initiating an effective funding mechanism for new public transit construction. In 1965 Germany's first federated transit authority was founded for the region of Hamburg.Principal among the goals of any cooperative agreement among transit companies are improvements for the passengers and improvement of revenues for the companies. To attain these ends, two distinct forms of transit aggrements have been developed in Germany: transit cooperative (Verkehrsgemeinschaft) and transit federation (Verkehrsverbund). The former is more suitable for smaller to medium-sized towns, while the latter is more suitable for larger cities. The two types are described in this article.German transit federations during the 1970s succeeded in significantly increasing ridership, while during the 1980s patronage has either remained steady or has declined. Yet transit federations showed much better perfomance than did public transit in general. In terms of costs and revenues, no public transit organization in Germany is able to break even; deficits vary between 42% and 55%. The author concludes, however, that hidden subsidies for automobile traffic are far higher, because of environmental damage and the high social cost of traffic accidents.     

AC4000交流传动电力机车的研制

从基本特点、总参数、设备布置、电气原理和机车特性等简要介绍了ＡＣ４０００交流传动电力机车、该型机车研制成功对我国铁路电气化事业的发展具有重要意义。     

SS4B型电力机车（2）──总体布置与通风系统

介绍了ＳＳ４Ｂ型电力机车的总体布置与通风系统，指出了ＳＳ４Ｂ型电力机车设备布置的主要特点。