噪声与振动控制2018，Vol.38Issue(z1)：269-272,4.DOI:10.3969/j.issn.1006-1355.2018.Z1.056
基于仿生非光滑结构的高速列车受电弓杆件减阻降噪研究
Study on Drag and Noise Reduction of Pantograph Rods based on Bionic Non-smooth Structures
摘要
Abstract
The aerodynamic noise generated by the pantographs of high-speed trains directly radiates to the surrounding environments and becomes one of the main noise sources of the trains. Since the rod is the main component of the pantograph structure, it is of great significance to study the aerodynamics of the rod structure for the reduction of noise and drag of the pantograph. In this paper, the finite element model of a typically sized pantograph bar was established for simulation analysis. The Realized k-e turbulence model and the broadband noise model were used to calculate the flow field distributions and aerodynamic noise magnitudes respectively. The mechanism of aerodynamic noise generation was investigated, and the shape of the cross-section of the rod was optimized. Furthermore, the bionic design of the rod structure was carried out according to the zigzag structure of front wing edge of the owl and the corrugated groove structure on the outer surface of intertidal shellfish. Finally, the effects of all kinds of bionically improved design were compared and analyzed through numerical calculation. The results show that the structure of annularly corrugated groove member is the best bionic design, which can achieve obvious drag reduction and noise reduction effects. And compared with the leeward side zigzag structure, the bionic design of windward side zigzag structure can effectively reduce aerodynamic noise, but it will increase the aerodynamic drag.关键词
振动与波/受电弓/流场/气动噪声/仿生结构/减阻降噪Key words
vibration and wave/pantograph/fluid field/aerodynamic noise/bionic structure/drag and noise reduction分类
交通工程引用本文复制引用
刘海涛,徐志龙..基于仿生非光滑结构的高速列车受电弓杆件减阻降噪研究[J].噪声与振动控制,2018,38(z1):269-272,4.基金项目
国家自然科学基金资助项目(51765017) （51765017）
江西省自然科学基金(20161BAB216136) （20161BAB216136）
江西省教育厅科技项目(GJJ150497) （GJJ150497）
