城市轨道交通在我国得到了迅猛发展。然而，在现有的轨道交通运输系统中，地铁占比达到了80%以上，地铁的建设和运营成本远高于高架轨道。制约高架轨道发展的主要原因是高架轨道结构辐射的振动噪声。本课题拟采用理论分析、模型试验、数值计算和现场测试相结合的方法，研究基于谱分析理论和FE-SEA混合法的高架轨道结构振动噪声预测方法，丰富和发展高架轨道全频域结构振动噪声理论与算法；研究高架轨道结构子系统模态密度、内部损耗因子及耦合损耗因子的实验测量和理论计算方法,提出取值范围；通过高架轨道全频域结构振动噪声仿真分析和现场测试，揭示高架轨道结构振动传递和噪声辐射规律；通过对阻尼技术、TMD技术和组合减振降噪技术进行参数分析和模型试验，研究其对高架轨道减振降噪的效果和频率适应范围。在此基础上，提出高架轨道结构振动噪声预测方法和控制对策。研究成果对于高架轨道结构振动噪声预测、评估及产品研发，具有重要的指导作用。

Urban rail transit has been developing rapidly in China. However, in the existing rail transportation system, the proportion of subway reaches more than 80%. The construction and operation cost of subway is much higher than that of elevated track. The main reason that restricts the elevated track in the urban transportation system is the vibration and noise emitted by the elevated track structure. Through the combination of theoretical analysis, model test, numerical calculation and field test，the vibration and noise prediction method of elevated track structure based on spectral analysis theory and FE-SEA hybrid method is studied, enriching and developing the theory and algorithm of vibration and noise of elevated track structure in full-frequency domain; the experimental determination and theoretical calculation methods of modal density, internal loss factor and coupling loss factor of elevated track structure subsystem are studied, and the range of values of above parameters is proposed. Through the simulation analysis and field test of vibration and noise of elevated track structure in full-frequency domain, the vibration transfer and noise radiation laws of elevated track structure are revealed. Through parameter analysis and model test of damping technology, TMD technology and combined vibration reduction and noise reduction technology, the effect and frequency adaptation range of vibration reduction and noise reduction in elevated track are studied. Based on this, the prediction method and control strategy of vibration and noise of elevated track structure are proposed. The research results are of great significance to the prediction, assessment and product and equipment development of elevated track structures.