电传动机车轮轨动力学性能研究

采和机车－轨道耦合动力学理论与方法，研究了电传动机车与轨道的动态相互作用问题，以抱轴式驱动系统电力机车为例，建立了机车一轨道查互作用统一的模型，运用ＶＩＬＴ领导具软件分析比较了弹性和风性抱轴式电传动机车对轨道的动力作用及牵引电机的振动特性，文章还讨论了牵引中种悬挂方法以动力学性能影响的特征，从而指出其适应范围。     

Improvements for the stability of heavy-haul couplers with arc surface contact

To investigate the stability mechanism of heavy-haul couplers with arc surface contact, the geometry and force analysis were conducted according to the friction circle theory. To improve the stability of the coupler, four improvements were proposed, which are increasing the secondary lateral stiffness of locomotives, adding a restoring bumpstop at the end of the coupler, increasing the arc surfaces radii and changing the clearance and stiffness of secondary lateral stopping block. A multi-body dynamics model with four heavy-haul locomotives and three detailed couplers were established to simulate the emergency braking. In addition, the coupler yaw instability was tested to investigate the effects of relevant parameters on the coupler stability. The results show that increasing the secondary lateral stiffness of locomotives, adding a bumpstop with a smaller bumpstop gap, increasing the arc surfaces radii, increasing the stiffness and decreasing the clearance of secondary lateral stopping block are conducive to improving the stability of the coupler with arc surface contact.     

Analysis of the car body stability performance after coupler jack-knifing during braking

This paper aims to improve car body stability performance by optimising locomotive parameters when coupler jack-knifing occurs during braking. In order to prevent car body instability behaviour caused by coupler jack-knifing, a multi-locomotive simulation model and a series of field braking tests are developed to analyse the influence of the secondary suspension and the secondary lateral stopper on the car body stability performance during braking. According to simulation and test results, increasing secondary lateral stiffness contributes to limit car body yaw angle during braking. However, it seriously affects the dynamic performance of the locomotive. For the secondary lateral stopper, its lateral stiffness and free clearance have a significant influence on improving the car body stability capacity, and have less effect on the dynamic performance of the locomotive. An optimised measure was proposed and adopted on the test locomotive. For the optimised locomotive, the lateral stiffness of secondary lateral stopper is increased to 7875?kN/m, while its free clearance is decreased to 10?mm. The optimised locomotive has excellent dynamic and safety performance. Comparing with the original locomotive, the maximum car body yaw angle and coupler rotation angle of the optimised locomotive were reduced by 59.25% and 53.19%, respectively, according to the practical application. The maximum derailment coefficient was 0.32, and the maximum wheelset lateral force was 39.5?kN. Hence, reasonable parameters of secondary lateral stopper can improve the car body stability capacity and the running safety of the heavy haul locomotive.     

玻璃钢在动车及机车司机室内装饰中的应用

介绍了玻璃钢的主要性能、技术要求及其在动车和机车司机室内装饰中的应用,并对其在铁道车辆上的应用前景进行了展望。     

机车不锈钢牵引销表面硬化工艺探讨

对X90CrMoV18不锈钢牵引销多种表面硬化工艺进行了试验,得出不同工艺下的试验结果,得到了可以满足技术要求的表面硬化工艺。     

SS3机车电子柜预备及跳主断故障检测装置的研制

通过SS3型电力机车电子柜预备故障和主断故障情况进行统计及原因分析，研制开发电子柜预备故障及跳主断故障检测装置，该装置测量电子柜的各路信号，并与断开主断的各条支路串联，对引发电子柜预备故障相关的电流和脉冲信号、断主断的12路脉冲信号进行实时监测、存储和信息提示，在机车运用和日常维修时发现故障而及时消除机破隐患，并设计地面数据分析系统对相关信号进行故障分析和性能趋势分析。     

机务段办公自动化系统中的安全文化管理

介绍了襄樊北机务段安全文化管理子系统要实现的功能及其各系统子模块设计，对系统的数据库设计思想和安全性设计进行了特别阐述。应用结果表明整个系统技术先进、效率高、开放性好，完全能满足用户的各项需求。     

8K机车904^#开关电源板的国产化研制

介绍了采用零电流开关变流技术研制8K机车904^#开关电源板,设计采用了模块化结构,从而提高了电源板使用的可靠性。通过微处理器软件编程技术实施对输入、多输出电源进行管理,不仅提高了对电源故障监控的准确性和响应速度,而且提高了对电源故障维修处理的效率。     

无线调车机车信号和监控系统车地通信的模型设计

指出了当前机车调车方法的不足,介绍了无线调车机车信号和监控系统的基本原理,设计了在无线调车方式下的车地通信模型,并说明了该模型中应该注意的一些问题.     

DSA250型受电弓控制策略

从电气控制原理和气动控制原理两方面介绍了KZ4A型交流传动电力机车用DSA250型受电弓的控制策略。