适应全程高架单轨车辆救援的制动设计

结合跨座式单轨车辆全程高架的线路特点,文章介绍了对故障车的停放制动远程缓解方案,同时,针对线路坡道较大的情况,对列车的救援制动进行了优化设计。     

Analysis of Thermal-Fluid-Structure Coupling and Resonance Forecast for Link Butterfly Valve Under Small Opening

When the link butterfly valve operates at a small opening degree in high temperature working conditions,it is prone to the problem that the valve is stuck,the strength is insufficient and the butterfly plate is violently vibrating.This paper shows simulation experiments of both thermal-fluid-structure coupling and resonance forecast about DN600 link butterfly valve in the working conditions of 250℃ and 0.5 MPa by ANSYS software.The medium is mixed with compressed air and flue gas.Flow field characteristics of the valve and stress deformation,modal and flow-induced vibration of butterfly plate are analyzed when the valve opening is less than 30%.The results indicate that,when the valve opening is less than 30%,fluid flow is relatively smooth in front of butterfly plate,a large number of vortexes are found behind the butterfly plate,and fluid flow is greatly chaotic in this position.The equivalent maximum stress and deformation of butterfly plate are relatively large when the valve locates in openings between 10% and 30%; the intensity of the butterfly plate is enough; the axial deformation does not impact opening and closing of the valve.The butterfly plate is likely resonant when the valve opening is less than 10%.The research of this paper provides a crucial reference for flow field characteristics of link butterfly valve,an analysis of intensity and rigidity of butterfly plate,and a resonance forecast of butterfly plate when the valve works in small opening.     

地铁车辆直通电空制动装置风源系统设计

通过对地铁车辆直通电空制动系统中风源系统的原理分析和参数计算,为地铁车辆制动系统的设计研究提供理论依据。     

Nabtesco地铁车辆制动系统概述

介绍了Nabtesco公司HRA制动系统的构成,并对该系统的有关功能做了相应描述,最后提出了制动系统未来的发展方向。     

马来西亚安邦延伸线车辆液压制动系统管路设计

文章介绍了液压制动系统的管路原理及系统组成,通过一系列试验数据以用于管路的设计选型,同时,对液压制动系统注油试验的过程与方法进行了详细说明。     

轨道交通装备空气管路用管接头设计探讨

文章介绍几种常用的轨道交通装备空气管路用管接头的结构形式工作原理,分析其密封性能,连接强度,安装方便性及重复安装性,提出系统性的轨道交通装备空气管路用管接头的设计选型建议。     

冰雪环境下高速公路安全管理

在冬季冰雪路面环境中,高速公路的行驶条件恶化,路面平整,能见度低,造成行车缓慢和交通事故。本文从冰雪成因和灾害机理的角度,重点研究高速公路上冰雪的危害。进行分析,提出相关建议,有效改善公路安全管理。