Shape Optimization of High-Speed Train Pantograph Insulators for Low Aerodynamic Noise

Abstract:

With large eddy simulation(LES) and Lighthill-Curle acoustic theory, the aerodynamic noises radiated from pantograph insulators with rectangular, circular, elliptical section were calculated, and the optimal pantograph insulator shape was obtained. The results show that in the same model, the sound pressure level (SPL) spectrum at different monitoring points are basically the same, but the amplitude is different. In different models, the SPL spectrum are different. As for rectangular, circular, elliptical section insulators, the frequency with maximum SPL reduces gradually. For reducing aerodynamic noise, the elliptical section insulator is optimal, and the long elliptical axis should be consistent with air flow. The pantograph with bigger and less components is helpful to reduce the aerodynamic noise.

• Periodical: Applied Mechanics and Materials (Volumes 249-250)
• Pages: 646-651
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.249-250.646
• Online since: December 2012
• Authors: Xiao Yan Yang, You Gang Xiao, Yu Shi
• Keywords: Aerodynamic Noise, High Speed Train (HST), Pantograph Insulators, Shape Optimization

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