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根据波动声学和几何声学原理,将列车看作一运动着的有限长线声源,建立了有声屏障时城市高架轨道交通沿线声场分布计算模型。该模型的建立及其应用可为高架轨道交通的规划及其声屏障设计提供科学依据和手段。模型中对声影区的声场分布采用惠更斯-菲涅耳原理进行推导计算,给出的理论计算公式可为推导计算其它复杂声源的衍射声提供借鉴。
According to the principles of wave acoustics and geometric acoustics, the train is regarded as a limited finite long-distance sound source. The sound field distribution model of the urban overhead rail transit is established. The establishment of the model and its application can provide a scientific basis and means for the planning of overhead rail transit and its sound barrier design. In the model, the sound field distribution of the acoustic zone is deduced and calculated by using the Huygens-Fresnel principle. The theoretical calculation formula provided can provide reference for deriving the diffraction sound of other complex sound sources.