摘要
为探究牵引电机气动噪声特性,采用分离涡模拟方法和Lighthi l l声类比理论,对牵引电机流场和声场进行联合仿真求解和分析。结果表明:气动噪声源主要集中在风扇区域,由风扇周期性旋转引起,是主噪声源。噪声主要向风机下游区域传播,且声传播主要发生在水平平面上。实际测试结果表明:电机降噪首先需要控制风机产生的气动噪声。测试与仿真的平均声压级数值误差均在3%以内,说明了该仿真结果的准确性。
In order to explore the aerodynamic noise feature of the traction motor,DES simulation method and Lighthill acoustic analogy theory are applied to perform the joint simulation solution and analysis of the flow field combined with the sound field in the traction motor.Results show that aerodynamic noise source concentrates in the fan area to become the main noise source,which is caused by the periodic rotation of the fan.The noise source mainly propagates to the downstream area of the fan and the sound propagation mainly occurs on the horizontal plane.The actual test results show that motor′s noise reduction requires the control of aerodynamic noise by the fan.Error between simulated and tested data are within 3%,to demonstrate the accuracy of the simulation results.
作者
陈致初
吴江权
陈瑞锋
李伟业
侯聚微
CHEN Zhichu;WU Jiangquan;CHEN Ruifeng;LI Weiye;HOU Juwei(XiangYang CRRC Electric Motor Technology Co.,Ltd.;CRRC Zhuzhou Electirc Locomotive Institute Co.,Ltd.;YiDuo Information Technology(Shanghai)Co.,Ltd.)
出处
《电机技术》
2020年第3期8-13,共6页
Electrical Machinery Technology
关键词
牵引电机
风扇噪声
气动噪声
数值模拟
traction motor
fan noise
aerodynamic noise
numerical simulation
