城市轨道交通高架结构噪声研究的进展

回顾了十多年来城市轨道交通高架结构噪声领域的研究状况。总结了结构噪声的频率特性、噪声和列车速度的关系、桥梁局部模态和整体模态对结构噪声的影响;比较了箱型梁和槽型梁的声压级指标。简要介绍了结构噪声的计算方法,同时指出了每种方法的不足;从减隔振、限制振动传播和能量衰减方面总结了相应的降噪措施,并重点介绍了减隔振降噪措施。最后,指出了该领域可进一步研究的问题。

Studies on the Viaduct Structure-borne Noise of Urban Rail Transit

With a review of the viaduct structure-borne noise of urban rail transit in the past ten more years,the noise characteristics,the relation between noise and train velocity,the influence of local and global modals are summarized,the sound pressure level of the box girder is compared with that of the channel girder.In the paper,plural calculation methods are briefly introduced,the defects of each method are pointed out.The noise reduction measures include vibration reduction/isolation,vibration transmission/limitation and energy attenuation,among them the vibration reduction/isolation is mainly discussed,problems are pointed out for further studies.