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反射面板对铁路噪声屏障效率的影响

Christian H Kasess¹, Thomas Maly², Wolfgang Kreuzer¹

¹Acoustics Research Institute, Austrian Academy of Sciences, Vienna, Austria.

The Journal of the Acoustical Society of America

|May 15, 2025

概括

在噪音屏障上的反射面板可以减少屏蔽. 现场测量显示,面板的位置和尺寸显著影响降噪,特别是在不同列车类型和屏障设计的情况下.

科学领域:

声学声学声学声学
环境工程环境工程
交通噪音交通噪音

背景情况:

透明的噪声屏障可能会由于车辆和屏障之间的多重反射而减少屏蔽效果.
之前的研究主要依赖于模拟,现场测量数据有限.

研究的目的:

在普通列车运行过程中呈现修改的噪声屏障在现场通过测量数据.
调查声学反射木制面板对噪声屏障性能的影响.

主要方法:

通过测量是在2米高,高度吸收噪声屏障上进行的,该屏障经过修改后采用反射木板.
在双轨线路上对不同列车类型 (客运和货运) 进行测量.
在没有障碍的参考截面中测量了声学排放.

主要成果:

面板的位置,吸收区域的大小,屏障超结构的形状和火车屏障距离显著影响了降噪.
不同的列车类型对修改后的障碍物表现出不同的反应.
一个简化的2.5D边界元素方法模型显示了预测面板效应的潜力,但源位置和定向性至关重要.

结论:

现场测量证实,对噪声屏障的修改,例如添加反射面板,可以改变其声学性能.
这些修改的有效性对位置,尺寸和与列车特征的相互作用是敏感的.
需要使用验证的建模方法进行进一步的研究,以优化噪声屏障设计.

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