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The impact of external environments and wheel-rail friction on noise inside a train car

机译：外部环境和轮轨摩擦对火车车厢内噪声的影响

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摘要

Trains travel through various environments typically on tracks above ground or in tunnels. When trains pass through different environments, the perceived noise inside a train car can change. For example, there are three main types of noise caused by wheel-rail interaction, namely, rolling, impact, and curve squeal. Each type can be perceived differently. To consider appropriate remedial measures, the effects of the external environment and wheel-rail interaction on noise inside train cars were investigated. Spectral analysis of noise from inside a train car traveling through tunnels featured a noticeable sound frequency around 250 Hz. More reflections enter train cars from tunnels with circular cross-section, namely those constructed by a boring machine. Impact noise had larger components at lower frequencies. Curve squeal noise had larger components at frequencies between 125 and 500 Hz.
机译：火车通常在地面以上的轨道或隧道中穿越各种环境。当火车经过不同的环境时，火车车厢内的感知噪音可能会改变。例如，由轮轨相互作用引起的噪声主要有三种，即滚动声，冲击声和弯道尖叫声。每种类型的感觉都不同。为了考虑适当的补救措施，研究了外部环境和轮轨相互作用对火车车厢内噪声的影响。穿过隧道的火车车厢内部的噪声的频谱分析的特征在于，大约250 Hz左右的声音频率。更多的反射从圆形横截面的隧道进入火车车厢，即由钻孔机建造的隧道。冲击噪声在较低频率下具有较大的分量。曲线尖叫声在125和500 Hz之间的频率处具有较大的分量。

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