客运专线板式轨道轮轨噪声分析

Analysis of Wheel/Rail Noise for Slab Track on Passenger Dedicated Line

在已建立的轮轨噪声预测模型STTIN的基础上,对高速列车在板式轨道上运行时的轮轨噪声进行了预测分析,并对高速列车在板式轨道上运行时产生的轮轨噪声与在有砟轨道上运行时的轮轨噪声进行了比较。发现钢轨辐射的主要是中、高频噪声,车轮辐射的主要是高频噪声,而轨道板则辐射中、低频噪声;钢轨、车轮和轨道板对总噪声的贡献不同,其中钢轨贡献最大,轨道板最小;无砟轨道的轨道旁噪声级与有砟轨道的相比高出约6.2 dB,铁路边界处近地面噪声级高出约3.5 dB,可见板式轨道噪声明显高于有砟轨道。

On the basis of wheel/rail noise prediction model called STTIN, wheel/rail noise produced by high-speed train running on slab track is analyzed and predicted, and wheel/rail noise of the slab track is compared with that on the ballast track. It is shown that the rail radiates chiefly middle and high frequency noise, and that the wheel radiates chiefly high frequency noise, and that the slab radiates noise in a range of middle and low frequency. It makes clear that the contributions of the rail, the wheel and the slab are not identical to the total noise. Among them, the rail is the largest, and the wheel takes the second place, and the slab is the smallest respectively. Moreover, conclusions are drawn that noise of the ballastless track, compared with that of the ballast track, is more server. The noise of the ballastless track is about 6.2 dB higher than that of the ballast track for the receiver nearby the rail, and about 3.5 dB higher than that of ballast track for the receiver at the boundary alongside the railway.