轨道交通箱形梁和U形梁的振动噪声对比研究
omparison on the structural vibration and noise radiation of box girder and U-shaped girder in elevated railway transit
轨道交通高架桥多采用混凝土箱形梁和U形梁结构。本文采用功率流方法进行车轨桥耦合振动计算，结合二维声无限元方法预测钢轨和桥梁结构的中频辐射噪声，对比分析了U形梁和单箱单室梁的钢轨、桥梁振动与声辐射的差异。结果表明：钢轨振动及声辐射与下部连接的桥梁形式关系不大，桥梁结构的振动与其抗弯刚度及钢轨在桥上的位置有关。单箱单室梁的钢轨噪声比U形梁的大1~3dB(A)，桥梁结构噪声在桥面以下比U形梁的小2~6dB(A)。
he concrete U-shaped viaduct and box-shaped viaduct are commonly used in elevated railway transit. This paper utilizes a power flow method and a two dimensional infinite element method to compare the structural vibration of the coupled vehicle-track-bridge system and the rail noise and bridge-borne noise in medium frequency domain between the U-shaped girder and the Single-box girder. The results show that the girder type doesn't affect the vibration and radiated noise of rail, and the bridge vibration is related to its bending stiffness and the location of rails. The rail noise of Single-box girder is 1~3dB(A) larger than the U-shaped girder, and the bridge-borne noise below the bridge is 2~6dB(A) less than U-shaped girder.
励吾千、李奇、吴定俊
铁路运输工程
轨道交通中频箱形梁U形梁桥梁噪声钢轨噪声
railway transitmedium frequencybox-shapedU-shapedbridge-borne noiserail noise
励吾千,李奇,吴定俊.轨道交通箱形梁和U形梁的振动噪声对比研究[EB/OL].(2015-05-13)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201505-152.点此复制
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