高架轨道系统诱发环境振动的实测与数值分析  

Field Test and Numerical Analysis of Environment Vibration Induced by Viaduct Track System

作　　者：刘庆杰[1] 雷晓燕[1] 许士强[1] 吕绍棣[1] 

机构地区：[1]华东交通大学,南昌066004

出　　处：《铁道工程学报》2008年第5期23-29,共7页Journal of Railway Engineering Society

摘　　要：研究目的:研究高架轨道系统诱发的地面振动特性。研究结论:(1)点荷载作用下,大地的响应与表面波的频散特性有关,低频振动衰减速度较慢,高频振动衰减速度较快,当激振频率接近大地主频时,大地振动有放大现象。(2)在数值计算当中,Rayle igh阻尼能较好的模拟大地的阻尼特性,其参数选取可采用试算的方法确定。The research is done on the characteristics of ground vibration induced by viaduct track system. Research conclusions： （ 1 ） The results show the group response relates to the characteristics of frequency dispersion under the effects of point load, that is the low frequency vibration wave is attenuated more slowly than high frequency vibration wave and when the vibration frequency is close to the main ground frequency, the ground vibration becomes large. （2） In numerical calculation, Rayleigh damping can simulate the ground damping characteristics well and its parameters can be decided with calculation.

关 键 词：高架轨道系统 环境振动 几何阻尼 材料阻尼 

分 类 号：U233[交通运输工程—道路与铁道工程]