输电导线风噪声声源特性的三维数值模拟
Three-Dimensional Numerical Simulation on Aeolian Noise Source Characteristics of Overhead Transmission Line
张红虎 1王琰 1李雯雯 2纪月 1吴珂1
作者信息
- 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
- 折叠
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.
Abstract
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 pattern has little 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Key words
transmission line/aeolian noise/three dimensional numerical simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据