1.中车南京浦镇车辆有限公司 技术中心;2.同济大学 铁道与城市轨道交通研究院
Techology Center of CRRC Nanjing Puzhen Co.Ltd
ABSTRACT: A certain type of train aerodynamic noise calculation model is established, based on the standard turbulence model and large eddy simulation (LES) to calculate the transient flow field outside the train, using FW-H equation to predict the far-field aerodynamic noise of the train. The total sound pressure level and contribution degree of external radiated noise when the train, car body, pantograph, and bogie are the noise sources are respectively calculated, and the aerodynamic noise spectrum characteristics generated by different noise sources are analyzed. The calculation results show that: the pantograph sliding plate has the largest total sound pressure level, followed by the front and the front and tail car bogies; the car body and the bogie have a greater contribution to the far-field noise of the train, while the pantograph The noise contribution of the nearby area is greater than that of the far field; the main frequency of car body and bogie noise is 400Hz～1250 Hz, while the main frequency of pantograph is 500Hz, and the amplitude of low-frequency noise is very small. The far-field radiation noise of the train as a whole is consistent with the far-field noise superposition obtained by using the car body, pantograph and bogie as noise sources, which verifies the accuracy of the calculation, and it has certain reference value for the calculation and research of noise.
朱程,金鑫,贾小平,等. 列车气动噪声源噪声贡献度研究[J]. 科学技术与工程, , ():复制