ORIGINAL RESEARCH article
Front. Acoust.
Sec. Acoustic Materials, Noise Control and Sound Perception
Volume 3 - 2025 | doi: 10.3389/facou.2025.1616806
Study on the noise reduction effect of sound barriers on the aerodynamic noise of high-speed trains
Provisionally accepted
- 1Jinan-Qingdao High-speed Railway, Jinan, Shandong Province, China
- 2School of Qilu Transportation, Shandong University, Jinan, Shandong Province, China
- 3School of Civil Engineering, Shandong University, Jinan, China
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Response 1: Thank you for bringing this to our attention. We chose a train model with three carriages, including a locomotive, one carriage, and a parking space. According to relevant literature, the aerodynamic characteristics of a 3-car formation are similar to those of an 8-car or 16-car formation. There is no significant difference in the positive and negative peak values of aerodynamic wind pressure, nor in the wind pressure magnitude during the monitoring point process in the middle section. A longer middle section formation only extends the time for peak values to occur. Therefore, this paper employs a 3-car formation for the numerical simulation of pulsating wind loads to save calculation time. We have added relevant references to reference [26], on Page 24.Response 2: Thank you for highlighting this issue. We have enhanced the content and details of the experiment on page 10 and added reference [27].Response 3: Thank you for your valuable comments. We have altered the horizontal coordinate system of Figure 12 on page 18 to a logarithmic scale.Response 4: Thank you for your valuable comments. The calculation model used in this article is the pressure acoustic-frequency domain calculation module in COMSOL Multiphysics, which does not incorporate sound absorption and insulation parameters. Only the material properties of sound velocity and solid density in the solid are necessary.Comments 5: [The manuscript calculated the contribution of aerodynamic noise to the external points of the vehicle, but at a speed of 300km/h, wheel rail noise cannot be ignored. Aerodynamic noise cannot represent the overall noise of high-speed railways. It is recommended to revise the title, conclusion, and abstract of the article to standardize the expression.] Response 5: Thank you very much for your valuable feedback. When a train runs at a speed of 350 km/h, although the wheel-rail noise is relatively minor, it cannot be ignored, especially in the lower area of the train. The contribution of structural noise is also relatively small, but it still needs to be considered in overall noise control. We have
Keywords: High-speed railroad, sound barrier, computational fluid dynamics, frequency domain characterization, Aerodynamic noise
Received: 23 Apr 2025; Accepted: 11 Jun 2025.
Copyright: © 2025 Zhang, Li, Yang, Chen and Yang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Shengyou Yang, School of Civil Engineering, Shandong University, Jinan, China
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