Abstract With the aim of studying the noise reduction performance of the vertical noise barrier on railway bridges, this paper introduces the statistical energy analysis (SEA) to predict their insertion losses. Two sub-models were built to estimate the transmission losses (TLs) between the two subsystems, thus the isolation properties and the sound absorption were simulated. A field measurement targeting the noise distribution on the transverse plane at the mid-span of the bridge was conducted, and the developed SEA model of the barrier was verified to be accurate. On this basis, the height, structural style, material composition and sound leakage of the barrier were selected as the objects for parametric analysis. The results show that the insertion losses decrease with the increasing horizontal distance, from 12 dB(A) to 11 dB(A) at points 7.5 m and 15 m away from the central line of the rail track. The most efficient enhancement on the performance can be obtained by heightening the barrier in the range of 3–4 m. Additional insertion losses can be obtained by optimizing structural styles at frequencies above 200 Hz. In addition, noise at the frequency range of 100–1000 Hz can be further controlled by internal sound absorption material. Finally, it is also of great importance to reduce sound leakage of the barrier plate.

中文翻译：

---

铁路桥梁沿线竖向隔音屏障降噪性能的统计能量法

摘要 为研究铁路桥梁垂直隔音屏障的降噪性能，引入统计能量分析（SEA）来预测其插入损耗。建立了两个子模型来估计两个子系统之间的传输损耗（TLs），从而模拟隔离特性和吸声。针对桥梁跨中横向平面上的噪声分布进行了现场测量，并验证了开发的屏障 SEA 模型的准确性。在此基础上，选取屏障的高度、结构样式、材料成分和漏声等作为参数分析对象。结果表明，插入损耗随着水平距离的增加而降低，在点 7 从 12 dB(A) 到 11 dB(A)。距轨道中心线5m和15m。通过在 3-4 m 范围内提高屏障，可以获得最有效的性能增强。通过优化 200 Hz 以上频率的结构样式可以获得额外的插入损耗。此外，内部吸声材料可以进一步控制 100-1000 Hz 频率范围内的噪声。最后，减少阻隔板的声音泄漏也很重要。100-1000 Hz 频率范围内的噪声可以通过内部吸声材料进一步控制。最后，减少阻隔板的声音泄漏也很重要。100-1000 Hz 频率范围内的噪声可以通过内部吸声材料进一步控制。最后，减少阻隔板的声音泄漏也很重要。