铁路道口预警安全系统在徐沛铁路中的应用

铁路道口预警安全系统是由中央处理系统、机车移动信息终端、地面无源应答器、道口监控和无线传输网络组成。介绍道口监控和无线网络传输的工作原理,以及在徐沛铁路的具体应用和效果。     

地铁折返道馆故障处理时行车组织方案探讨

道岔是用于列车转线的重要轨道设备,也是轨道上的薄弱环节。正线上的道岔一旦发生故障,将对地铁正常运行、折返作业造成很大影响,会降低地铁运营的效率和质量。文章结合西安地铁2号线一期线路情况,探讨地铁折返道岔故障处理及行车组织调整方案,提出处理流程和行车组织中的关键点。     

Motion cueing in high-performance vehicle simulators

The majority of motion cueing algorithms have been developed for passenger car applications, with correspondingly less research dedicated to race-car and high-performance vehicle simulators. In the high-performance context, the focus is on cueing the vehicle's behavioural and handling characteristics, particularly when driving near the limits of performance. In race-car simulators the cueing requirements are therefore quite different, with the problem made all the more challenging by the presence of large accelerations. To understand the drivers' cueing needs, the vehicle's stability and handling response characteristics must be examined near the performance boundary. Frozen-time eigenvalue analyses are used to determine stability and response characteristics across all vehicle operating conditions, including accelerating and braking under cornering, with the results used to determine motion cueing algorithm requirements. Lateral acceleration and yaw cueing filters are designed in order to retain information critical to understanding the vehicle's behaviour on its performance boundary. Cueing filters are then tested, with the help of a professional race-car driver, and are found to provide the cues necessary for the driver to control the vehicle on the limit of performance.     

Development of a generalised equivalent estimation approach for multi-axle vehicle handling dynamics

This paper devotes analytical effort in developing the 2M equivalent approach to analyse both the effect of vehicle body roll and n-axle handling on vehicle dynamics. The 1M equivalent vehicle 2DOF equation including an equivalent roll effect was derived from the conventional two-axle 3DOF vehicle model. And the 1M equivalent dynamics concepts were calculated to evaluate the steady-state steering, frequency characteristics, and root locus of the two-axle vehicle with only the effect of body roll. This 1M equivalent approach is extended to a three-axle 3DOF model to derive similar 1M equivalent mathematical identities including an equivalent roll effect. The 1M equivalent wheelbases and stability factor with the effect of the third axle or body roll, and 2M equivalent wheelbase and stability factor including both the effect of body roll and the third-axle handling were derived to evaluate the steady-state steering, frequency characteristics, and root locus of the three-axle vehicle. By using the recursive method, the generalised 1M equivalent wheelbase and stability factor with the effect of n-axle handling and 2M equivalent generalised wheelbase and stability factor including both the effect of body roll and n-axle handling were derived to evaluate the steady-state steering, frequency characteristics, and root locus of the n-axle vehicle. The 2M equivalent approach and developed generalised mathematical handling concepts were validated to be useful and could serve as an important tool for estimating both the effect of vehicle body roll and n-axle handling on multi-axle vehicle dynamics.     

旅顺新港客货滚装码头后方陆域布置及规划

根据项目所在地的客滚运输特点,分析旅顺新港客货滚装作业区的周边环境、与相邻工程的关系、主要交通类型、交通组织形式以及停车场布置形式等总体布置时考虑的主要因素,介绍旅顺新港客货滚装作业区的总体布置思路,阐述客货滚装作业区的装卸工艺、停车场布置、交通组织等平面布置方面的要点。     

基于虚拟现实的远程操作在物料搬运机械系统中的应用展望

有毒,危险品的装卸和把人从恶劣环境下解放出来并提高工作效率是当前物料搬运中有待于解决的难题。基于虚拟现实的远程操作技术是解决这一问题的有效途径之一。本文探讨了这一技术应用于物料搬运机械和系统的方法,重点讨论了其中具有沉浸感的人机接口,场景表达,体系生成和控制技术等方面的问题。     

长沙磁浮快线低置结构关键技术标准优化研究

长沙磁浮快线低置结构技术标准主要包括轨道梁结构和路基工程两方面内容,其中轨道梁的梁型、防错台构造、垫层以及路基工程的路基面宽度、基床厚度、线间排水等关键技术标准存在一些问题,主要表现为存在技术缺陷、设计偏于保守、工程投资偏高等。针对这些问题进行理论分析和研究,并提出优化措施。研究成果及结论为:(1)低置结构轨道梁宜采用U形梁,轨道梁节间伸缩缝处宜采用传力杆防错台措施,轨道梁基底宜设置碎石垫层,施工时可掺5%水泥填筑;(2)路肩宽度一般取为1.5 m,当两侧路肩有信号灯等站后设备时,可局部加宽路基面;(3)路基基床厚度可采用1.8 m,其中基床表层厚度为0.3 m,基床底层厚度为1.5 m;(4)线间汇水宜利用轨道梁上部梁体的节间缝进行排水,同时线间回填层顶面应做好防排水措施。     

城市快速路型式的选择与探讨

快速路是城市道路网络的骨架,如何在实际工程中采用合理的型式,才能发挥其相应的作用,带动城市发展。论文结合一些工程建设案例,对上述问题进行了分析和讨论。     

汽车高速行驶操纵性柔性多体动力学预测方法

为了评价、鉴定汽车在高速公路上高速行驶时的操纵性,运用柔性多体系统动力学方法,建立了基于ADAMS软件平台的整车刚柔耦合多体系统操纵动力学仿真分析模型.对模型中柔性体,应用有限元分析软件ANSYS进行模态分析,利用ADAMS/Flex模块,将模态变形融入柔性多体系统的运动学、动力学仿真中.通过“转向盘中间位置的仿真“,得到了转向盘力输入的主要评价指标值,仿真计算与实测结果最大误差在10%以内.因此,在汽车设计阶段,可以利用柔性多体模型较准确地预测汽车在高速公路上高速行驶时的操纵性,并可替代实车测量方法.