输电导线风噪声声源特性的三维数值模拟  

hree-Dimensional Numerical Simulation on Aeolian Noise Source Characteristics of Overhead Transmission Line

作　　者：张红虎[1] 王琰 李雯雯 纪月 吴珂[1] ZHANG Honghu;WANG Yan;LI Wenwen;JI Yue;WU Ke(College of Civil Engineer and Architecture,Zhejiang University,Hangzhou 310000,China;Economic Development Office,Lanting Sub-district Office,Keqiao District,Shaoxing 312000,China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310000 [2]柯桥区兰亭街道办事处经济发展办公室,浙江绍兴312000

出　　处：《电声技术》2024年第10期8-14,18,共8页Audio Engineering

摘　　要：高空输电导线产生的风噪声严重影响建筑声环境,而相关环境噪声预测与降噪措施的前提是获取导线风噪声声源特性。对常用的LGJ-300/25钢芯铝绞线与等直径光滑圆柱建立三维模型,采用基于大涡模拟法和莱特希尔声类比法的混合计算方法进行数值模拟分析,探究导线风噪声特性及其与圆柱之间的差异。结果表明,混合计算方法可有效用于导线风噪声模拟;30 m·s^(-1)风速下,该导线花纹对风噪声影响不大,同轴向长度下导线和圆柱模型数值模拟效果相当。通常导线轴向长度较长,可采取建立小长度元段模型进行声学修正的方法计算单位长度导线的声功率,以提高计算效率。Aeolian noise of overhead transmission lines poses a significant threat to building environment.To predict and mitigate the noise,it is crucial to analyze the sound source characteristics.Combining large eddy simulation and Lighthill acoustic analogy,this paper employed a three-dimensional model to analyze the source characteristics of a commonly used conductor(LGJ-300/25 aluminum conductors steel reinforced)as well as a smooth cylinder of equal-diameter as comparison.The results show that the hybrid calculation method can be effectively used to simulate the wind noise of the conductor;under the wind speed of 30 m·s^(-1),the conductor patterm has lttle effect on the wind noise,and the numerical simulation effect of the conductor and the cylinder model is equivalent under the same axial length.Usually the axial length of the conductor is long,and the acoustic correction method can be used to calculate the sound power per unit length of the conductor in order to improve the computational efficiency by establishing a small-length meta-segment model.

关 键 词：输电导线 风噪声 三维数值模拟 

分 类 号：TM75[电气工程—电力系统及自动化]