地铁引起建筑结构振动及室内辐射噪声的数值分析

Numerical Analysis of Structural Vibration and Radiated Noise Induced by Subway

针对地铁沿线建筑物室内振动与二次辐射噪声问题,采用数值方法建立了建筑物有限元模型与建筑物室内声学边界元模型,研究建筑物振动与二次辐射噪声规律;同时,结合工程实测数据,对数值模拟结果进行比较研究;采用间接边界元法分析了室内二次辐射噪声响应及其空间分布特性,并与实测点声压进行比较。

On the purpose of studying on ground-borne vibration and noise in buildings induced by under-ground railways, the FEM and BEM models were used to simulate structural vibration and noise in a building respectively in this paper. Using the ground in-situ measurement accelerations as inputs, a 3-D finite element model of a structure was established. Vibrations of the floor and the wall were simulated and the results were compared with the experimental data. An acoustic BEM model with the vibration response on the structure sur-face as boundary conditions was established. The ground-borne noise in a building was simulated and results were also compared with the experimental data.