| 高速列车转向架部位气动噪声数值模拟及降噪研究 |
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| 引用本文： | 黄莎,杨明智,李志伟,徐刚.高速列车转向架部位气动噪声数值模拟及降噪研究[J].中南大学学报(自然科学版),2011,42(12). |
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| 作者姓名： | 黄莎 杨明智 李志伟 徐刚 |
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| 作者单位： | 中南大学交通运输工程学院,轨道交通安全教育部重点实验室,湖南长沙,410075 |
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| 基金项目： | 空气动力学国家重点实验室开放基金(SKLA20110202); 中南大学前沿研究计划(2010QZZD020) |
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| 摘 要： | 基于Lighthill声学理论,采用三维、LES大涡模拟和FW-H声学模型对高速列车转向架部位气动噪声进行数值模拟,并提出降噪改进意见.研究结果表明:转向架部位气动噪声在很宽的频带内存在,无明显的主频率,是一种宽频噪声；各监测点气动噪声频谱在低频时幅值较大,随着频率的升高,幅值下降,1/3倍频程A声压级主要集中在315～1 250 Hz频率范围内；当来流速度一定时,距离气动噪声源越远,声压级幅值和总声压级越小；在列车转向架部位设置裙板后,运行速度为300 km/h时,车外声压级幅值较无裙板时有所减小,平均降幅约为8％,总声压级平均降幅1.3 dBA；适当增加裙板面积后,声压级幅值平均降幅达到12％,总声压级平均降幅2.08dBA,降噪效果较明显.
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| 关 键 词： | 气动噪声 数值模拟 声压级幅值 总声压级 降噪 |
Aerodynamic noise numerical simulation and noise reduction of high-speed train bogie section |
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| HUANG Sha
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YANG Ming-zhi
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LI Zhi-wei
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XU Gang.Aerodynamic noise numerical simulation and noise reduction of high-speed train bogie section[J].Journal of Central South University:Science and Technology,2011,42(12). |
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| Authors: | HUANG Sha YANG Ming-zhi LI Zhi-wei XU Gang |
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| Institution: | HUANG Sha,YANG Ming-zhi,LI Zhi-wei,XU Gang (1.Key Laboratory of Traffic Safety on Track,Ministry of Education,School of Traffic & Transportation Engineering,Central South University,Changsha 410075,China) |
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| Abstract: | In order to decrease the aerodynamic noise of train bogie section,three-dimensional,large eddy simulation and FW-H acoustic model were adopted to simulate the aerodynamic noise outside high-speed train bogie section based on Lighthill acoustic theory,and noise reduction advice was proposed.The results show that the aerodynamic noise is a kind of wide frequency noise which exits in wide frequency band without obvious main frequency.The acoustic pressure amplitude of every test point is great at low frequency... |
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| Keywords: | aerodynamic noise numerical simulation acoustic pressure amplitude total acoustic pressure level noise reduction |
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