摘要
为研究高速列车受电弓安放位置和受电弓导流罩嵌入车体高低对气动噪声的影响,基于计算声学理论,建立高速列车气动噪声模型。高速列车模型采用四节编组,包括头车、两节中间车和尾车。受电弓分别安放于02车一位端、02车二位端和03车一位端,并考虑受电弓的开/闭口方式。研究结果表明:沿列车长度方向,受电弓分别安放在02车一位端、02车二位端、03车一位端的受电弓导流罩区域的气动噪声最大声压级呈减少趋势,且这种减小趋势与受电弓开闭口方式无关;受电弓导流罩安放在同一位置时,受电弓以闭口方式运行的受电弓导流罩区域声压级均小于开口方式,最大声压级相差1.1 dBA;采用dlz3模型(受电弓导流罩与车顶表面平齐)的气动噪声性能最优,最大声压级减小2.3 dBA。
To study the aerodynamic noise effects of the installation position of pantograph and the fairing embedded into the different height of vehicle body,the aerodynamic noise models of high-speed trains were established based on the computational acoustics theory.The high-speed train model used a four-car consist,including one head car,two middle cars,and one tail car.The pantograph fairings were installed on the front end or the rear end of the first middle car,or fixed on the front end of the second middle car,considering the choice of pantograph knuckle-downstream or knuckle-upstream directions.The results show that the maximum sound pressure level(SPL)of the aerodynamic noise of the pantograph fairings tends to decrease as the installation position moves backward along the longitudinal direction of the high-speed train.The decreasing trend is not affected by pantograph’s running direction.If pantograph fairing is fixed in the same position,the maximum SPL of the pantograph fairing region in the pantograph knuckle-upstream direction is lower than that in the knuckle-downstream direction,with maximum sound pressure level difference of 1.1 dBA.The aerodynamic noise performance of the dlz3 model(with the pantograph fairing being flush with the vehicle roof surface)is superior,with the maximum SPL reducing by 2.3 dBA.
作者
张亚东
张继业
ZHANG Yadong;ZHANG Jiye(Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen 518055,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2020年第8期60-67,共8页
Journal of the China Railway Society
基金
广东省基础与应用基础研究基金(2019A1515111005)
中国博士后科学基金(2019M662201)。
关键词
高速列车
受电弓
受电弓导流罩
气动噪声
大涡模拟
降噪
high-speed train
pantograph
pantograph fairing
aerodynamic noise
large eddy simulation
noise reduction
