动车组转向架虚拟仿真检修支持系统关键技术

为了支持CRH380BL高速动车组转向架的检修与维护,作者采用虚拟现实、多媒体和仿真等技术,设计开发了动车组转向架检修支持系统.通过可视化的多媒体信息平台,可以高效率地培训检修人员,并提供辅助检修功能,还可以作为相关人员在其它场合的直观交流沟通手段.在介绍转向架结构特点以及系统需求、结构与功能的基础上,详细介绍了转向架的动态三维模型浏览、虚拟装配仿真、多媒体信息集成、交互方式和数据压缩等关键技术的实现.     

Fatigue assessment of tilting bogie frame for Korean tilting train: Analysis and static tests

This study has assessed fatigue strength of bogie frame for Korean tilting train. For evaluation of the loading conditions, multi-body dynamic analyses have been carried out. And, strength analysis has been performed by finite element analyses. From these analyses, stress concentration areas were investigated. A total of 25 strain gauges were placed on these areas and static tests were performed. Based on the fatigue assessment, it was clear that the bogie frame satisfied structural safety.     

板坯横移车结构应力测试及其性能分析

介绍了板坯横移车的基本结构、应变测试方法以及测试结果,根据测试结果分析了设备运行工况及设备目前的运行状况,并给出了相应的加强对策。     

Contact angle estimation and composite locomotive strategy of a stair-climbing mobile platform

This paper presents a stair-climbing mobile platform built on the Rocker–Bogie mechanism which enables to effectively climb up/down various sizes of stairs in indoor environments without violating its mobile stability. First, the link parameters of Rocker–Bogie mechanism are optimally chosen via the Taguchi method in order to make the trajectory of its center of mass (CM) as smooth as possible, which implies high mobile stability as well as excellent adaptability during climbing up/down stairs. Based on this optimization result, the proposed mobile platform is compactly and lightly constructed suitable for indoor applications by placing all motors and sensors inside the hollow links in order to prevent undesired interferences with stairs as well as to protect themselves from external impact. A simple, robust and cost-effective estimation algorithm is proposed to detect the contact angles between wheels and a stair with high fidelity. Through the kinematic and kinetic analysis combined with the wheel-stair contact angle information, a composite locomotive strategy is established not only to minimize the slip during climbing up a stair but also to prevent falling down during climbing down a stair. The extensive experiments against various types of stairs successfully demonstrate the capability of the proposed mobile platform to effectively and safely climb up/down stairs.     

OVMAT矮塔斜拉桥拉索体系的研究与应用

综合考虑各方面因素，最终确定模型试验的缩尺比例为1／1．4，转向器采用19-Ф15．24。模型设计时，混凝土采用50号，钢筋采用Ⅰ、Ⅱ级钢，选取受力最不利的C1束为试验索孔、C2束为试验备用索孔，试验模型节段含C1、C2两层索孔。节段模型试验的基本参数如下，模型总体布置如图4所示。     

基于Optistruct的地铁构架有限元强度分析及优化

建立地铁构架的有限元模型,根据UIC515-4、UIC615 4和EN13749标准对构架进行静强度和疲劳强度评定.结果表明,构架符合静强度和疲劳强度要求.此外还使用Optistruct软件对构架板材厚度进行尺寸优化,优化结果符合构架静强度和疲劳强度评定要求,优化结果可行.优化结果相比初始设计,减重达到12.3％.     

特种线路重载轨道架车设计

从铁路车辆、公路运输车的设计思路提炼,着重探讨了轨道架车在特种线路运输行驶时应具备的主要功能,介绍了设计方案,对于关键技术如多转向架跨装、球面回转心盘、弹性滚珠旁承、制动系统等作了阐述.作为一个全新概念的轨道架车,参照铁路标准进行仿真分析,从而对整个系统设计的合理性、主要性能的优劣做出判断.     

基于Pro/E的跨座式单轨转向架分离装置运动仿真分析

转向架分离装置是跨座式单轨车辆转向架与车体相分离的关键设备,其中沉降梁的旋转控制以及平台升降过程的水平性在转向架分离装置中相当重要。首先对该运动的相关机构进行了结构分析,并利用Pro/E对沉降梁回转以及平台升降运动进行仿真,最后实现了对数字油缸运动规律的反求,验证了水平保持机构方案的可行性,研究结果可以为相似设备的研究与设计提供借鉴。     

转K2型转向架交叉拉杆的有限元仿真研究

交叉拉杆是转向架的关键部件之一,在车辆运行中承受横向、纵向和垂向载荷的共同作用。基于弹性有限元理论,利用有限元分析软件ANSYS对其进行在时速60km/h、80km/h、100km/h、120km/h的直线运行工况下的动应力仿真,由ANSYS求解器给出轴向应力和等效应力,根据所求得的应力结果,判定出交叉拉杆的危险部位,并分析其高应力区产生的原因,计算结果与文献[2]相符合,为今后交叉支撑装置的疲劳可靠性研究奠定基础。     

高速卷绕机卷绕方法的分析与研究

卷绕方法是化纤长丝生产中的一项关键技术。在分析化纤生产工艺和卷绕运动规律的基础上,论述了高速卷绕机的各种卷绕方法,为在生产过程中灵活实施提供了依据和手段,对提高化纤装备现代化水平具有实用价值。