铁道科学与工程学报2012，Vol.9Issue(6)：72-76,5.
高速列车受电弓绝缘子的气动噪声计算及外形优化
Aerodynamic noise calculation and shape optimization of high-speed train pantograph insulators
摘要
Abstract
By using large eddy simulation and FW - H equation, the aerodynamic noises radiated from pantograph insulators were calculated, including rectangular, circular, oval - shaped cross - section insulators, the optimized cross - section shape was confirmed. The results show that in the same model, the sound pressure level (SPL) distribution at each sound receiver point from different sound receivers is basically the same, but the amplitude is reduced with the increase of distance from insulators. In different models, the SPL distribution is different at each frequency point. From rectangular, circular to oval shaped cross -section model, the freguency of the maxmium SPL gradually reduces. For reducing aerodynamic noise, the oval section insulator is optimal, and the long oval axis should be consistent with the air flow. The pantograph with bigger parts size and less parts number is helpful to reduce the aerodynamic noise.关键词
高速列车/受电弓绝缘子/气动噪声/外形优化Key words
high - speed trains/ pantograph insulators/ aerodynamic noise/ shape optimization分类
交通工程引用本文复制引用
肖友刚,时彧..高速列车受电弓绝缘子的气动噪声计算及外形优化[J].铁道科学与工程学报,2012,9(6):72-76,5.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）
