Noise-radiation analysis of box-shaped rail bridges considering multi-span effects
學年 108
學期 1
出版（發表）日期 2019-09-01
作品名稱 Noise-radiation analysis of box-shaped rail bridges considering multi-span effects
作品名稱（其他語言）
著者 L Y Liu; S Y Peng; J D Yau; Q M Liu; R Xi
單位
出版者
著錄名稱、卷期、頁數 Journal of Applied Science and Engineering 22(3), p.469-479
摘要 Low-frequency structure-borne noise radiation from train-induced vibration of railway bridges is of concern to assess environmental impacts induced by urban metro system. To carry out the bridge-radiated noise analysis in assessing environmental impacts, the bridge vibration is regarded as an acoustic source of noise radiation so that the finite element (FE) bridge model combined with the acoustic boundary element (BE) method of spatial noise radiation is adopted in performing acoustical computations. For verification, an in-situ experimental noise measurement of rail box-shaped bridge on the selected metro line of Nanchang Metro is used to evaluate the feasibility of the present hybrid FE-BE approach. In addition, the method of panel acoustic contribution analysis is proposed to assess the noise levels radiated from a single/multi-span box-shaped bridges, respectively. With the present investigations, the multi-span bridges may result in larger structure-borne radiated sound pressure levels at far-fields than a single-span. Such a multi-span effect on bridge-radiated noise should be accounted for environmental noise evaluation along urban metro lines.
關鍵字 Acoustical Boundary Element Method;Box Girder;Finite Element Modeling;Panel Acoustic Contribution Analysis;Structure-borne Noise
語言 en_US
ISSN
期刊性質 國內
收錄於 EI ESCI
產學合作
通訊作者 JD YAU
審稿制度 是
國別 TWN
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/117151 )