噪声与振动控制2017，Vol.37Issue(4)：138-143,196,7.DOI:10.3969/j.issn.1006-1355.2017.04.027
地铁线路轨道中高频动态特性研究
Study on Medium/High Frequency Dynamic Characteristics of Subway Tracks
摘要
Abstract
The medium/high frequency dynamic characteristics of subway tracks have important effects on wheel-rail vibration noise and short-wave-length rail corrugation. Based on the structure of subway monolithic track, the 3D finite element model of the track is established. Combined with the results of field hammering test, the medium/high frequency dynamic characteristics of the subway track are analyzed. The influences of the stiffness and the wheel load on the high frequency dynamic characteristics of the track are also investigated. The results show that:(1) For general fasteners (vertical static stiffness is about 40kN/mm)- overall track structure, the low frequency (below 150 Hz) modals demonstrate the overall vertical bending vibration of the track plate and the rail; the medium/high frequency (150 Hz-1500 Hz) modals show the bending vibration of the rail relative to the track plate, flexural vibration of the track plate alone and torsional vibration of the rail. (2) The fasteners with 10 kN/mm-40 kN/mm vertical stiffness have some influence on the vertical dynamic characteristics of the rail only in the frequency range below 750 Hz. (3) The modals of the wheelset below 1500 Hz frequency demonstrate mainly bending and torsional vibration. Fastener's stiffness has little effect on the low frequency modals of the track (the whole vertical bending vibration of the rail and track plate). But it can affect part of the high-frequency modals obviously (vertical bending vibration of the rail). In the frequency range of 400 Hz-1100 Hz, the frequency of the vertical modals of the rail with the effect of the wheelset considered increases by10 Hz-56 Hz.关键词
振动与波/地铁线路/整体道床轨道/有限元法/模态分析/中高频动态特性Key words
vibration and wave/subway line/monolithic track bed/finite element method/modal analysis/medium/high frequency dynamic characteristic分类
交通工程引用本文复制引用
吴海涛,李伟,温泽峰,池茂儒..地铁线路轨道中高频动态特性研究[J].噪声与振动控制,2017,37(4):138-143,196,7.基金项目
国家科技支撑计划资助项目(2015BAG12B01-16 （）
2015BAG13B01-03) （）
