再论构架蛇行波作为车轨(桥)时变系统横向振动激振源的合理性  

Further Discussion on the Rationality of Bogie Frame Crawl Waves as Lateral Vibration Source of Train-Track(Bridge)Time-variant System

作　　者：向俊[1] 曾庆元[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《长沙铁道学院学报》2003年第1期1-7,共7页Journal of Changsha Railway University

基　　金：国家自然科学基金资助项目(50078006);铁道部科技研究开发计划项目(2001G029);教育部高等学校博士点科研基金项目(20010533004)

摘　　要：车轨(桥)时变系统横向振动计算中的一个关键是此系统横向振动激振源的确定.迄今为止,国内外研究大多以轨道横向不平顺为此系统横向振动的激振源.但是引起此系统横向振动的因素很多,诸如轨道横向不平顺、车轮踏面锥度、轮轨缺陷及制造误差、车辆质量及其载重的偏心.仅考虑轨道横向不平顺,显然忽视了其他很多因素的作用,而这些因素的作用无法包含在轨道不平顺中.15年前,曾庆元院士就提出了以构架蛇行波作为车轨(桥)时变系统横向振动激振源的思想.本文再次从数学、力学角度对此思想进行了论证,并结合大量详实的经试验验证了的计算结果及近年来作者在车振实测及列车脱轨研究方面所积累的一些印证材料,充分说明了此思想的合理性及正确性.The key of lateral vibration calculation of traintrack(bridge)timevariant system is to determine lateral vibration source of the system.Up to now,numerous researchers at home and abroad have considered the lateral track irrgeularities as lateral vibration source of the system.In fact,lateral vibration of the system is caused not only by the lateral track irregularities,but also by many other factors,including conical wheel tread,flaw and error of wheel and rail,eccentric mass and load of vehicle,and so on.If only lateral track irregularites is considered,many other factors are obviously ignored.Fifteen years ago,Academician ZENG Qingyuan presented the thought with bogie frame crawl waves as lateral vibration source of the system,which is further demonstrated from the point of view of mathematics and mechanics here.Based on the considerable calculated results verified by tests,together with other verifying materials accumulated by our research on train derailment and vehicle vibration test,this paper adequately shows the rationality and correctness of the thought.

关 键 词：构架蛇行波 激振源 车轨系统 车桥系统 横向振动 

分 类 号：U211.3[交通运输工程—道路与铁道工程]