Structure parameter influence of slab track for high speed railway on wheel-rail noise
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摘要: 为了降低轮轨噪声, 利用轮轨噪声预测模型与软件STTIN (Simulation of Train/Track In-teraction and Noise), 分析了板式轨道结构参数对轮轨噪声的影响。发现以下规律: 轨下胶垫刚度大于200 MN.m-1时, 轮轨噪声水平显著上升; 当轨下胶垫阻尼值偏离100 kN.s.m-1时, 噪声将增大; 改变板下支承刚度, 轮轨噪声基本不变化; 增加轨道板质量, 轮轨噪声降低。结果表明, 轨下胶垫的刚度与阻尼是影响轮轨噪声的主要因素, 而轨道板质量次之, 轨道板下支承刚度对轮轨噪声基本无影响。Abstract: In order to decrease wheel-rail noise, wheel-rail noise predicting model and STTIN software were put forward, the structure parameter influence of slab track on wheel-rail noise was analyzed.It is pointed that wheel-rail noise rises while the stiffness of rail pad is higher than 200 MN·m-1, and the damping of rail pad drifts off the value of 100 kN·s·m-1, wheel-rail noise is almost indeclinable when modifying the stiffness of slab pad, but it decreases when increasing the mass of slab.The result shows that the stiffness and damping of rail pad are the key factors influencing wheel-rail noise, the mass of slab is the secondary factor, and the stiffness of slab pad primarily has no influence on wheel-rail noise.
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Key words:
- railway engineering /
- high speed railway /
- slab track /
- structure parameters /
- wheel-rail noise
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表 1 钢轨近旁等效声级
Table 1. Equal sound level near rail
dBA 板下单位长度支承刚度 车轮声级 钢轨声级 轨道板声级 总和声级 376.6 MN·m-1 100.81 107.03 96.16 108.24 5 714.4 MN·m-1 100.79 107.14 97.51 108.41 
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表 2 桥面下方0.3 m处近旁等效声级
Table 2. Equal sound level below 0.3 m of bridge surface
dBA 板下单位长度支承刚度 车轮声级 钢轨声级 轨道板声级 总和声级 376.6 MN·m-1 75.37 84.26 76.00 85.33 5 714.4 MN·m-1 75.35 84.39 75.39 85.36
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表 3 钢轨近旁等效声级
Table 3. Equal sound level near rail
dBA 轨道板质量 车轮声级 钢轨声级 轨道板声级 总和声级 477 kg·m-1 102.77 109.03 101.24 110.50 954 kg·m-1 102.90 108.72 94.76 109.87
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