摘要
采用大涡模拟方法(large eddy simulation,LES)以及Ffowcs Williams and Hawkings(FW-H)声比拟方法模拟高速列车受电弓区域周围流场的流动,并分析400 km/h和450 km/h工况下近远场气动噪声分布特性。研究结果表明:受电弓区域中心至展向两侧5 m范围是声压级衰减最大的区域,在400 km/h和450 km/h这2种工况下衰减15~16 dB,衰减率约为3.2 dB/m,噪声主频集中在200~500 Hz。在400 km/h和450 km/h的工况下分别在260 Hz、275 Hz达到声压级峰值。沿着列车纵向,受电弓区域至车厢尾部声压级最大衰减4 dB;距离列车中心线30 m处,垂向两侧声压级最大衰减6.4 dB。
The large eddy simulation(LES)was combined with the Ffowcs Williams and Hawkings(FW-H)acoustic analogy method to numerically investigate the flow field characteristics and analyze the near/far-field aerodynamic noise distribution at the operational conditions at 400 km/h and 450 km/h.The results show that the maximum sound pressure level(SPL)attenuation of 15-16 dB occurs at the operational conditions at 400 km/h and 450 km/h,within a 5 m spanwise range centered at the pantograph region,corresponding to an attenuation rate of approximately 3.2 dB/m.The dominant noise frequencies concentrate in the 200-500 Hz band,with SPL peaks observed at 260 Hz(400 km/h)and 275 Hz(450 km/h).Along the train's longitudinal direction,the maximum SPL attenuation between the pantograph region and the trailing car reaches 4 dB.At 30 m lateral distance from the train centerline,the vertical SPL attenuation attains 6.4 dB.
作者
许建林
郑培杰
公沛霖
陈嘉辉
钊文昊
李鹏
XU Jianlin;ZHENG Peijie;GONG Peilin;CHEN Jiahui;ZHAO Wenhao;LI Peng(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《中南大学学报(自然科学版)》
北大核心
2025年第5期2135-2147,共13页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(11962014)
高速磁浮运载技术开放基金资助项目(SKLM-SFCF-2023-009)。
关键词
高速列车
受电弓
气动噪声
大涡模拟
FW-H声比拟
high-speed train
pantograph
aerodynamic noise
large eddy simulation
FW-H acoustic analogy
