Optimization Design Scheme for Aerodynamic Noise Reduction in Pantograph Area of High-speed Railway EMU
［Objective］ With the increase of train operating speed, noise levels have gradually become a critical factor restricting the development of high-speed railways. It is essential to explore the potential for positive aerodynamic acoustic optimization in the pantograph area and propose an optimized des...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Urban Mass Transit Magazine Press
2025-02-01
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| Series: | Chengshi guidao jiaotong yanjiu |
| Subjects: | |
| Online Access: | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.02.013.html |
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| Summary: | ［Objective］ With the increase of train operating speed, noise levels have gradually become a critical factor restricting the development of high-speed railways. It is essential to explore the potential for positive aerodynamic acoustic optimization in the pantograph area and propose an optimized design scheme for reducing the aerodynamic noise in this region. ［Method］ Using the Fuxing Standard EMU (model CR400BF) as the research object, the research content, technical approach, and methodology are expounded. The LES (large eddy simulation) algorithm and FW-H (Ffowcs Williams-Hawkings) equation are employed to investigate the aerodynamic noise in the pantograph area of high-speed railway EMU. Additionally, the aerodynamic acoustic performance of the pantograph area in existing high-speed railway CRH380BL EMU is studied. Six combined optimization schemes are designed, focusing on the upper body structure and the bottom diversion structure of the pantograph. The aerodynamic noise reduction effectiveness of each scheme is evaluated, and the optimal scheme is applied to the CR400BF EMU to further test its noise reduction performance. ［Result & Conclusion］ Scheme 4 is identified as the optimal solution. When applied to the CR400BF EMU operating at a speed of 350 km/h, the overall train radiated noise sound pressure level at the nearest standard measuring point to the pantograph is reduced by 0.99 dB(A), while the radiated noise sound pressure level in the pantograph area is reduced by 1.70 dB(A). As a novel noise reduction method for pantographs, Scheme 4 has low technical requirements and larger potential for market application. |
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| ISSN: | 1007-869X |