Complexity Study on the Unsteady Flow Field and Aerodynamic Noise of High-Speed Railways on Bridges

Table 1

Comparison table of sound pressure levels on horizontal monitoring points.

Positions from the head nose tip	8 m	14 m	20 m	26 m	32 m	Horizontal maximum attenuation value
Head nose tip	90.5	88.4	86.1	85.6	84.4	6.1
First-end bogie of the head railway	95.5	94.6	94	91.9	90.5	5.0
Second-end bogie of the head railway	94.6	94.1	93.3	92.8	92.9	1.8
First-end air barrier	97.5	94.1	93.2	92.1	91.9	5.6
First-end bogie of the mid railway	95.0	94.1	92.9	92.5	92.4	2.6
Second-end bogie of the mid railway	93.5	92.9	92	91.5	91.6	2.0
Second-end air barrier	95.6	92.3	91.7	91.1	90.9	4.7
Second-end bogie of the tail railway	93.2	92.8	91.8	91.3	91.5	1.9
First-end bogie of the tail railway	90.7	90.6	90.5	88.7	87.2	3.5
Tail nose tip	84.7	82.4	81.3	80.5	79.3	5.4
Longitudinal maximum attenuation value	12.8	12.2	12.7	12.3	13.6	—