Investigation into Aerodynamic Noise Characteristics of Train Head Car Bogie Based on Simplified Models

doi:10.3901/JME.2016.08.152

Abstract

Abstract: Due to the complicated mechanism of high-speed train aerodynamic noise formation and difficult in its analysis, using the current detection system can’t distinguish high-speed train aerodynamic noise characteristics clearly from the measured the total noise of the high-speed train in operation. The calculation models of aerodynamic noise of the simplified bogie, the simplified car body and the car body with the two simplified bogies are developed. Using these models analyze flow field and acoustic field distribution around the simplified bogie, the simplified car body and the car body with the two simplified bogies at 200 km/h, 300 km/h. The analysis results show the simplified bogie with periodic vortex generation and shedding phenomenon, around the surrounding radiation dipole distribution, bogie side up and down for the aerodynamic noise source concentration area when it operates. This is mainly caused by the role between the wheelset axle and the bogie frame beam and airflow. The noise level of the front wheelset is larger than that of the rear wheelset on both the vertical symmetric plane perpendicular to the travelling direction and the longitudinal symmetry plane. Bogies play a significant role to aerodynamic noise around the head car. At the speed of 200 km/h,the interaction of the bogie and the airflow can make head car outside of pneumatic noise amplitude increased 3-5 dBA, and 5-8 dBA for 300 km/h . Noise increasing near the bogie is the most obvious.

Key words: bogie, headstock, high-speed train, pneumatic noise, wheelset

CLC Number:

U270

LI Hui, XIAO Xinbiao, JIN Xuesong. Investigation into Aerodynamic Noise Characteristics of Train Head Car Bogie Based on Simplified Models[J]. Journal of Mechanical Engineering, 2016, 52(8): 152-161.

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