城市轨道交通桥梁振动及噪声辐射研究
发布时间：2019-06-02 06:31
【摘要】：高架结构在轨道交通中的比例愈来愈大,城轨桥梁振动引起的噪声辐射问题也引起越来越多的关注。利用边界元方法对槽型梁、箱型梁及T型梁3种不同截面形式的城轨桥梁的振动噪声辐射进行分析,研究结果表明:在列车荷载作用下槽型梁的位移响应最大,其次为箱型梁,T型梁的位移响应最小;城轨桥梁下部场点的声压级普遍大于上部场点的声压级;距离轨道中心线0~10 m范围内,槽型梁的场点声压级最大,其次为T型梁,箱型梁的场点声压级最小;10~40 m范围内T型梁的场点声压级最大,其次为箱型梁,槽型梁的场点声压级最小;列车的运行参数对结构的振动响应和振动噪声辐射有显著影响。
[Abstract]:The proportion of viaduct structure in rail transit is increasing, and the noise radiation caused by the vibration of urban rail bridge has attracted more and more attention. The vibration and noise radiation of three kinds of urban rail bridges with different sections of slot beam, box beam and T beam are analyzed by boundary element method. The results show that the displacement response of slot beam is the largest under train load, followed by box beam. The displacement response of T-shaped beam is the smallest. The sound pressure level of the lower field point of the urban rail bridge is generally larger than that of the upper field point. Within the range of 0 鈮，
本文编号：2490896
[Abstract]:The proportion of viaduct structure in rail transit is increasing, and the noise radiation caused by the vibration of urban rail bridge has attracted more and more attention. The vibration and noise radiation of three kinds of urban rail bridges with different sections of slot beam, box beam and T beam are analyzed by boundary element method. The results show that the displacement response of slot beam is the largest under train load, followed by box beam. The displacement response of T-shaped beam is the smallest. The sound pressure level of the lower field point of the urban rail bridge is generally larger than that of the upper field point. Within the range of 0 鈮，
本文编号：2490896
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