环境工程学报2013，Vol.7Issue(4)：1583-1588,6.
高速列车纵向对称面气动噪声计算及外形优化
Numerical prediction of aerodynamic noise radiated from longitudinal symmetric plane of high-speed train and shape optimization
摘要
Abstract
The aerodynamic noise spectra of longitudinal symmetric plane of high-speed train were calculated and clarified by large eddy simulation and Lighthill-Curle acoustic theory. The optimal aerodynamic shape at vehicle junctions was got. The results show that the noise level of the aerodynamic noises is reduced greatly with the increase of frequency. When the train velocity is unchanged, the farther away from the aerodynamic noise sources, the less the attenuation rate of total noise level. With increase of the train velocity, the farther away from noise sources, the less the noise level increase. The fluctuation pressure is the source of aerodynamic noise, which can be reduced by using nurbs curve at vehicle junctions.关键词
高速列车/纵向对称面/气动噪声/外形优化Key words
high speed train/ longitudinal symmetric plane/ aerodynamic noise/ shape optimization分类
交通工程引用本文复制引用
肖友刚,张平..高速列车纵向对称面气动噪声计算及外形优化[J].环境工程学报,2013,7(4):1583-1588,6.基金项目
国家自然科学基金资助项目(50975289) （50975289）
中国博士后科学基金资助项目(201104514,20100471229) （201104514,20100471229）
