Characteristics and Mechanism Analysis of Aerodynamic Noise Sources for High-Speed Train in Tunnel

Table 1

Fitting coefficients between the sound source energy and the inflow velocity.

Area					Fitting degree
	Fitting coefficient	Standard deviation	Fitting coefficient	Standard deviation
The whole car	1.69 − 10	1.473 − 10	5.77	0.191	0.99888
The bottom of the head car’s streamlined part	8.57 − 11	9.701 − 12	5.90	0.025	0.99998
Bogie 01	3.50 − 11	6.295 − 12	6.11	0.040	0.99996