不同外径输电线风噪声的试验研究  

Experimental study on the properties of aeolian noise generated by transmission lines with different external diameters

作　　者：朱云祥[1] 沈国辉[2] 陈梁金 高志林[3] 张扬[2] ZHU Yunxiang;SHEN Guohui;CHEN Liangjin;GAO Zhilin;ZHANG Yang(State Grid of Zhejiang Electric Power Corporation,Hangzhou 310007,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Electric Power Design Institute of Zhejiang Province,Hangzhou 310007,China)

机构地区：[1]国网浙江省电力公司,杭州310007 [2]浙江大学建筑工程学院,杭州310058 [3]中能建浙江省电力设计院有限公司,杭州310007

出　　处：《振动与冲击》2019年第6期40-45,共6页Journal of Vibration and Shock

基　　金：国家自然基金(51838012);浙江省自然科学基金(LY16E080005)

摘　　要：针对不同外径和风速下输电线的风噪声问题,进行了5种输电线在4种风速下的风洞试验,分析了输电线风噪声的频谱特征、卓越频率及对应的斯特罗哈数,探讨了总声压级和A计权总声压级,并对比了相近外径输电线和光滑圆柱风噪声。结果表明:输电线风噪声主要由风流经表面产生的涡脱引起,卓越频率与涡脱频率非常接近;风噪声涡脱的斯托罗哈数随雷诺数增加呈增大趋势;输电线风噪声的A计权总声压级随着风速的增大而增大,随输电线外径的增大而减小;高风速下输电线风噪声的A计权总声压级小于同直径的光滑圆柱,两者差距随着风速的增加而增大。In order to study the aeolian noise generated by transmission lines with different external diameters at different wind speeds, aeolian noise experiments of five kinds of transmission lines at four different wind velocities were carried out. The spectrum characteristics, peak frequency and corresponding Strouhal Number of the aeolian noises were analyzed. The overall sound pressure level and A-weighted overall sound pressure level were also studied. Finally, the aeolian noise of transmission lines and smooth circular cylinders with nearly the same external diameters were compared. The results show that the aeolian noise of transmission lines is mainly generated from the vortex-shedding of the passing flow, resulting in the fact that the peak frequency is very close to the vortex-shedding frequency. The Strouhal Number of the aeolian noises of transmission lines shows a rising trend with the increase of the Reynolds number. The A-weighted overall sound pressure level of aeolian noise of transmission lines increases with the increase of the wind speed and decreases with the increase of the external diameter. The A-weighted sound pressure level of transmission lines is smaller than that of smooth circular cylinders with the same external diameters in higher wind speed condition, and the difference between them will become larger if the wind speed increases.

关 键 词：输电线 风噪声 声学风洞 风洞试验 声压级 

分 类 号：TU312[建筑科学—结构工程]