基于子区间的车-线-桥振动不平顺影响分析  

Influence of Track Irregularity on Train-rail-bridge Vibration Based on Sub-interval

作　　者：杨宏印 陈志军[2] 彭旭民 

机构地区：[1]中铁大桥科学研究院有限公司,湖北武汉430034 [2]华中科技大学土木工程与力学学院,湖北武汉430074

出　　处：《石家庄铁道大学学报（自然科学版）》2016年第2期6-11,共6页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(51078164);湖北省自然科学基金(2013CFA135)

摘　　要：提出了任意子波长区间的轨道不平顺生成方法,讨论了相应时域样本的特性。建立了耦合系统振动方程,对比分析了大波长区间及其子区间不平顺的影响,研究了系统响应的敏感波长。结果表明：轨道不平顺样本的功率谱和解析值一致,不平顺生成方法是合理有效的;轨道不平顺对桥梁位移影响很小,桥梁加速度的敏感波长区间为1～5 m;0.05～1 m的短波不平顺是轨道加速度的主要激励源,而对车体加速度影响很小。线路养护和维修中应加强对5 m以下波长不平顺的控制;而为提高乘车舒适性,有必要对各种波长不平顺进行控制。The generation method for rail irregularity with arbitrary wavelength is proposed,and the characteristics of the samples in time domain are discussed.The vibration equations of the interaction system are established,and the comparison of the influences of large wavelength and its sub-intervals irregularity is analyzed.The sensitive wavelengths of dynamic responses are investigated.The results demonstrate that the power spectra of rail irregularity samples are consistent with analytical values,andthe generation method is reasonable and effective.The irregularity has little effect on bridge displacement,and the sensitive wavelength interval for bridge acceleration is 1～5 m.The irregularity with wavelength 0.05～1 m should be the main excitation source for the rail acceleration while it has little effect on the car body acceleration.The irregularity with wavelength less than5 m should be particularly controlled in track maintenance,and to improve the riding comfort,the irregularity with any wavelength should be controlled.

关 键 词：轨道不平顺 车-线-桥耦合振动 敏感波长 共振 动力响应 

分 类 号：TU311.3[建筑科学—结构工程] U213.2[交通运输工程—道路与铁道工程]