摘要
为研究现代有轨电车诱发的大地振动传播规律,在总结基于SIMPACK软件实现轮轨耦合方法的基础上,提出一种实现轮轨耦合仿真的改进方法,并应用该方法建立现代有轨电车-无砟轨道-大地的3维耦合振动分析模型,对有轨电车诱发的大地振动特性进行分析。结果表明:研究由有轨电车诱发的大地振动时,应重点关注竖向振动情况;随着距振源距离的增大,较大的峰值频率减小,且主频由30.6 Hz变为6.3 Hz,这与大地振动的频散特性相关;大地表面振动在6.3 Hz时衰减最慢,且会出现"振动放大"现象;该轮轨耦合方法既可用于车辆与大地间的耦合,又可用于车辆与桥梁或者其他轨道结构间的耦合。
In order to study the propagation law of ground vibration induced by modern tramcars,the wheel-rail coupling methods implemented with SIMPACK software are summarized.On this basis,an improved method for wheel-rail coupling simulation is proposed.A three-dimensional vibration analysis model coupled by modern tramcar-slab,tracks and ground is established with this method.Then,the characteristics of the ground vibration induced by the tramcars are analyzed.The results show that one should pay more attention to the vertical vibration when studying the ground vibration induced by the tramcars.With the increasing of the distance from the vibration source,the larger peak frequency decreases.And the main frequency changes from 30.6 Hz to 6.3 Hz due to the frequency dispersion characteristics of the ground vibration.The surface vibration of the ground decays very slowly at 6.3Hz frequency and the vibration amplification phenomenon occurs.It is concluded that the improved method of wheel-rail coupling can be used for the analysis of the coupling between vehicle and ground,as well as the coupling between vehicle and bridge or other track structures.
作者
罗锟
汪振国
雷晓燕
孙滨
LUO Kun;WANG Zhenguo;LEI Xiaoyan;SUN Bin(Engineering Research Center of Railway Environment Vibration and Noise,Ministry of Education,East China Jiaotong University,Nanchang 330013,China)
出处
《噪声与振动控制》
CSCD
2018年第2期113-119,共7页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51268015
51478184)
江西省教育厅研究课题资助项目(GJJ170357)
