翻车机空推车联轴器的技术改进

由于设备设计选型存在的问题,翻车机推车器弹性柱销联轴器在运行中导致设备故障频繁及检修困难。据此,针对翻车机火车空车推车联轴器存在的问题,对联轴器的故障点进行了分析,并提出了解决的措施;对火车空车推车联轴器故障制定了切实可行的改进方案;对改造前后联轴器的工作原理和使用性能进行了对比,并对联轴器转矩验算进行了校核,通过对改造实施后推车联轴器的检查,发现效果显著。     

东西南北中，发财到广东

一直以来，我是铁路及火车的爱好者，曾经在老家租住在铁路边的房子，每天听听火车的声音，或是下班后坐在铁轨边看看火车，也经常沿着铁路线走上一公里去女友家玩。     

董祝礼：消费者应在汽车安全质量方面有所作为

很高兴参加今天的论坛，为了保护消费者利益这样一个目的，和大家一起探讨汽车的安全品质和发展问题。大家都知道，在中国现在飞机是越造越大，火车是越跑越快，汽车越卖越多。那么在今年一季度，受各方面政策影响下，机动车销量仍然接近了500万，这其中主要的贡献来自于广大的消费者，包括在座的大家都是消费者。那么在这样一个数字的背后，     

微道

三联生活周刊【大象挠痒痒】在南非北部的比林斯堡野生动物园，一辆小汽车内的两个乘客惊恐地发现，他们在错误的时间到了错误的地方，他们驾驶的汽车被大象当成了痒痒挠。最后二人成功逃离，但是车废了，车胎全瘪，玻璃全碎、车顶凹陷、底盘断裂。微评：保险会赔么？平安北京：【汽车失控上铁轨 交警挺身拦火车】日前，太原一越野车因脚垫卡住油门失控，冲上铁轨被卡死，聚集了大量围观群众。一列火车呼啸而来，交警立即疏散围观人群，仍有多人不慌不忙。为安全起见，一名交警上前拦截火车，火车在距离100多米处停下，避免了更大的交通事故。     

世界交通发展史话(一)

1780—1879蒸汽机全盛时代 人体能承受多大的速度?当首批蒸汽机牵引的火车出现时,人们就提出了这个问题。因为他们担心火车跑得这样快,车上的旅客会不能呼吸或会被震动晃得失去知觉。但到了19世纪50年代,火车乘客正在以前所未闻的速度(80千米/小时或更快)前进,并且爱上了火车。火车也比其他交通工具更舒适,在恶劣的天气下也更少停开。火车旅行价格便宜,因此那些以前从未出门旅行过的人,现在也能买票乘火车旅行。曾经显得相距很远的地方,突然感到接近许多了。因为在两地之间,人员和货物的交往以前需要几天,而现在     

电子技术在现代客车上的应用

目前客车的电器布线仍使用传统的办法，每个电器都要使用一根以上的导线与开关相连，用线多且存在的问题不少；另外，在车速记忆功能方面也缺乏有效的显示方法，竭待用新的电子技术进行解决。     

从解决“春运”买票难看高层理政新思路

1月14日，胡锦涛主席在反映春运火车“买票难”问题的信息上作出批示：今年春运供求矛盾十分严峻。铁道部要开动脑筋，研究采取若干便民、利民措施，并公布於众，以化解矛盾，确保春运任务顺利完成。次日，铁道部召开新闻发布会，就“春运”买票难等问题回答记者和社会关心的问题。     

铁路分局调度系统数据库连接优化方案研究

在铁路分局调度系统应用的基础上，分析了JDBC1.0在数据库连接方面的性能和存在问题，介绍了JDBC2．0的新特性和在解决数据库连接方面所具有的优势，并根据实际应用给出了实例。通过对JDBC2.0在调度系统中应用的性能评价．展示了JDBC2．0的良好功能和广阔的应用前景。     

高速公路IP语音调度系统的设计与实现

介绍针对高速公路调度指挥设计的IP语音调度系统，通过IP语音技术解决高速公路调度指挥中通信方面存在的问题。论述系统的设计与结构，并对主要功能的实现原理和实现方法进行了介绍。     

机电产品受迫振动响应与车载运输振动情况

分析了机电产品对不同受迫振动过程的响应规律，测试了我国部分地区汽车与火车的运输振动情况，并与部分国家的汽车和火车的运输振动情况进行了比较。     

A study on mechanical mechanism of train derailment and preventive measures for derailment

The research status of train derailment is summarized. Major problems existing in current derailment research are pointed out. By applying system dynamics stability concepts, the mechanical mechanism of train derailment is described. The theory of random energy analysis for train derailment is then further expounded and preventive measures for train derailment and a calculation method for an anti-derailment safety coefficient (of train - track time variant system) are introduced. Finally, some train derailment cases are analysed. Six train - track time variant system vibration cases are calculated, four of which derailed and two that did not. The conclusion compares the results of the theoretical analysis with that which actually occurred.     

顶置凸轮轴配气机构多体运动学分析与应用

基于多体系统运动学数值原理,对顶置凸轮轴配气机构多体运动学正解计算问题进行了研究;探讨了利用气门升程数据和由各种不同生产检测方法测得的测头位移数据确定凸轮型线的逆解途径;提出了顶置凸轮轴配气机构多体运动学的正-逆联解方法,实现从原理上精确反求凸轮型线。所述研究较好地解决了顶置凸轮轴配气机构在设计、制造和检测过程中产生和派生出来的各种运动学关系问题。     

Interaction study of train–bridge–track systems using Maxwell model

The investigation of problems related to the interaction of train, bridge and track systems has been accelerated by the emergence of high-speed trains. Such studies are required, not only for the endurance issues regarding bridge and tracks, but to assure trains’ functionality and performance. The suspension mechanism of train systems is of prime importance in defining the functionality of high-speed trains, and accurate mathematical models of the mechanism are imperative. This paper introduces a numerical technique for an interaction study of train–bridge–track systems based on Maxwell (three-element type) modeling of the suspension mechanisms of vehicles. Track irregularity in sinusoidal form is also integrated into the mathematical model. Although the proposed technique is simple in formulation, it offers phenomenal accuracy in representing the interaction of train, track and bridge systems. In a numerical example, the dynamic behavior of a train–bridge system has been studied. Results of this analysis provide a valuable insight into the contributing roles of different parameters in this subject.     

汽车动力传动系局部扭振模态和半轴对称分支模型简化问题探讨

本文探讨FR式汽车动力传动系扭振的局部模态及其主导子结构和半轴子结构对称分支的模态对称性与模型简化问题,在这两方面取得了一些新的认识,有助于对这类汽车动力传动系扭振分析模型的合理简化和对扭振特性的深入认识。     

Vibration control in train–bridge–track systems

To study the problems associated with vibration control of train–bridge–track systems a mathematical model with the capability of representing supplementary vibrational control devices is proposed. The train system is assumed as rigid bodies supported on double-deck suspension mechanism with semi-active features. The bridge system is modeled using the modal approach. Vibration control for bridge responses is provided by tuned mass dampers. A non-classical incremental Eigen analysis is proposed to trace the system characteristics across the time. In an example, the capability of the proposed model in investigating the vibration control prospects of a bridge–train system is shown. The results indicate the effectiveness of active suspension mechanism in reducing train's body movements, particularly the pitching angle and the vertical accelerations. Accordingly, the results also verify the potential of TMD devices in reducing the bridge responses at resonance motions.     

Interaction study of train-bridge-track systems using Maxwell model

The investigation of problems related to the interaction of train, bridge and track systems has been accelerated by the emergence of high-speed trains. Such studies are required, not only for the endurance issues regarding bridge and tracks, but to assure trains' functionality and performance. The suspension mechanism of train systems is of prime importance in defining the functionality of high-speed trains, and accurate mathematical models of the mechanism are imperative. This paper introduces a numerical technique for an interaction study of train-bridge-track systems based on Maxwell (three-element type) modeling of the suspension mechanisms of vehicles. Track irregularity in sinusoidal form is also integrated into the mathematical model. Although the proposed technique is simple in formulation, it offers phenomenal accuracy in representing the interaction of train, track and bridge systems. In a numerical example, the dynamic behavior of a train-bridge system has been studied. Results of this analysis provide a valuable insight into the contributing roles of different parameters in this subject.     

公路列车的体系框架与关键技术

环保、安全是交通运输领域备受关注的两大重要问题,智能交通系统(ITS)是解决这两大问题的一种有效方法。公路列车(Road Train)系统作为车用自组织网络(VANETs)在ITS领域的一个特殊应用,通过车车协同,整个公路列车队中,除头车由驾驶员驾驶,其他车辆都受头车发送的控制数据控制其自动驾驶。该系统集成了微电子技术、网络通信技术、多传感器集成技术以及车辆自动控制技术,旨在提高交通运输的安全性以及减少其所带来的环境污染,同时增加驾驶舒适性,其核心思想是通过车车通信的方式实现车辆之间的列队协同列队行驶。首先介绍了公路列车系统的概念,分析了公路列车系统的优点,提出了公路列车系统的体系框架结构,深入讨论了公路列车系统中所包含的关键技术,最后对公路列车系统进行了总结。     

Method for obtaining the modal properties of articulated trains equipped with independently rotating wheels

Independently rotating wheels in railway vehicles could represent an alternative to standard technology as a solution to dynamic problems such as hunting instability or steering forces in curves. Among the proposed design solutions, the train with independently rotating wheels and with the most practical applications is that developed by Talgo. The Talgo technology is based on the use of a passive steering technique of the wheelset through a mechanism. The absence of automatic control systems means that a careful selection of the mechanical parameters of the vehicle is required to improve its dynamic characteristics. Aspects such as dynamic stability or the effect of vibration on passenger comfort could be analysed by extracting the modal properties of the train from mathematical models. In this article, a methodology for determining the low-frequency modal properties of articulated trains equipped with independently rotating wheels and passive steering system (Talgo-type) is proposed. The singularity of this application based on the use of non-conventional wheelsets necessarily involves the development of a specific methodology.     

基于行星轮的8速自动变速器传动比计算

基于行星齿轮运动分析,本质反映了共用行星轮组合式行星齿轮变速机构的传动特性,并对某8速自动变速器的传动原理进行分析,提供了各挡传动比的计算方法。基于行星轮的分析方法,为研究复杂行星齿轮机构传动问题和设计汽车自动变速器提供了具体的解决途径。     

Method for obtaining the modal properties of articulated trains equipped with independently rotating wheels

Independently rotating wheels in railway vehicles could represent an alternative to standard technology as a solution to dynamic problems such as hunting instability or steering forces in curves. Among the proposed design solutions, the train with independently rotating wheels and with the most practical applications is that developed by Talgo. The Talgo technology is based on the use of a passive steering technique of the wheelset through a mechanism. The absence of automatic control systems means that a careful selection of the mechanical parameters of the vehicle is required to improve its dynamic characteristics. Aspects such as dynamic stability or the effect of vibration on passenger comfort could be analysed by extracting the modal properties of the train from mathematical models. In this article, a methodology for determining the low-frequency modal properties of articulated trains equipped with independently rotating wheels and passive steering system (Talgo-type) is proposed. The singularity of this application based on the use of non-conventional wheelsets necessarily involves the development of a specific methodology.