铁道科学与工程学报2013，Vol.10Issue(1)：1-5,5.
基于有限元-边界元无砟轨道声辐射特性分析
Analysis of acoustic radiation characteristics for unballasted track based on finite element-boundary element method
摘要
Abstract
The boundary element model of unballasted track system was established.The dynamic response of track system to high frequercy vibration calculated by means of FEM combined with BEM method was taken as the calculation boundary condition of acoustic radiation,thus,the acoustic radiation charateristics of the rail and rail structure were obtained.The results show that between 800-3 000 Hz,the noise mainly comes from the acoustic radiation of steel rails,and between 0-500 Hz,the noise mainly comes from that of slab tracks.With the increase of the distance,acoustic radiation of track system appears to decrease linearly,moreover the acoustic of steel rails is more obvious than that of slab track,which is almost more than 15 dB,and the acoustic radiation of waist rail is more obvious than that of other parts of steel rails.This paper' s prediction of the result of track system' s noise is consistent with that of other models very well.It indicates the reasonableness and feasibility of the model and the practice,thus provides theoretical basis for further damping of noise and vibration of railways.关键词
无砟轨道/有限元法/边界元法/钢轨/轨道板/声辐射特性Key words
ballastless track/ finite element method/ boundary element method/ rail/ slab tracks/ acoustic radiation characteristics分类
交通工程引用本文复制引用
刘林芽,吕锐,许群峰,邱仕辉..基于有限元-边界元无砟轨道声辐射特性分析[J].铁道科学与工程学报,2013,10(1):1-5,5.基金项目
国家自然科学基金资助项目(51068007 （）
51268014) （）
