高速列车底部结构参数对气动噪声影响规律  

Influence of Underbody Parameters of High-Speed Trains on Aerodynamic Noise

作　　者：陈羽 柳壹明[1,2] 毛懋 李启良 王毅刚[1,2] 杨志刚[1,2,3] CHEN Yu;LIU Yiming;MAO Mao;LI Qiliang;WANG Yigang;YANG Zhigang(School of Automotive Studies,Tongji University,Shanghai 201804,China;Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management System,Tongji University,Shanghai 201804,China;Beijing Aeronautical Science&Technology Research Institute,Beijing 102211,China)

机构地区：[1]同济大学汽车学院,上海201804 [2]同济大学上海市地面交通工具空气动力学与热环境模拟重点试验室,上海201804 [3]北京民用飞机技术研究中心,北京102211

出　　处：《西南交通大学学报》2023年第5期1171-1179,共9页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金(52002283,U1834201);上海市地面交通工具空气动力与热环境模拟重点实验室(23DZ2229029)。

摘　　要：为更好地开展高速列车气动降噪设计,建立了高速列车头车第一组转向架区域的6参数模型,采用计算气动声学和拉丁超立方抽样实验所设计的方法,得到了13个参数化模型的远场气动噪声、转向架舱内湍流脉动功率级和声功率级,并分析了底部结构参数对远场和近场气动噪声的影响规律.结果表明:底部结构参数对远场噪声影响范围为75.4~78.9 dB(A),裙板高度、排障器厚度、转向架舱后缘倒角和舱长度与远场噪声为负相关,舱前缘倒角、排障器前缘夹角与远场噪声为正相关,底部结构参数的变化主要影响中心频带315~1250 Hz间的噪声能量;排障器厚度和前缘夹角与远场噪声、舱内湍流脉动功率、声功率均为负相关;裙板高度和远场噪声、舱内湍流脉动功率级为负相关,与舱内声功率为正相关.In order to better perform the aerodynamic noise reduction design of high-speed trains,a 6-parametric model of the first bogie section of the high-speed train head car was established.The method designed by computational aeroacoustics and Latin hypercube sampling experiments was used,and the far-field aerodynamic noise,turbulent fluctuation power level,and acoustic power level inside the bogie cavity of 13 parametric models were obtained.The influence of underbody parameters on far-field and near-field aerodynamic noise was analyzed.The results show that the influence range of the underbody parameters on the far-field noise is 75.4–78.9 dB(A).The apron height,cowcatcher thickness,chamfer of the rear edge of the bogie cavity,and cavity length are negatively correlated with the far-field noise,while the chamfer of the leading edge of the cavity and the leading-edge included angle of the cowcatcher are positively correlated with the far-field noise.The changes in underbody parameters mainly affect the noise energy in the central frequency band of 315–1250 Hz.The cowcatcher thickness and leading-edge included angle are negatively correlated with far-field noise,turbulent fluctuation power level,and acoustic power level inside the bogie cavity.The apron height is negatively correlated with the far-field noise and the turbulent fluctuation power level inside the bogie cavity and positively correlated with the acoustic power level inside the bogie cavity.

关 键 词：高速列车 气动噪声 底部结构 参数化设计 相关系数 

分 类 号：U270.16[机械工程—车辆工程]