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超高层建筑气动噪声场的大涡模拟

祝志文 邓燕华

祝志文, 邓燕华. 超高层建筑气动噪声场的大涡模拟[J]. 西南交通大学学报, 2019, 54(4): 748-756. doi: 10.3969/j.issn.0258-2724.20180066
引用本文: 祝志文, 邓燕华. 超高层建筑气动噪声场的大涡模拟[J]. 西南交通大学学报, 2019, 54(4): 748-756. doi: 10.3969/j.issn.0258-2724.20180066
ZHU Zhiwen, DENG Yanhua. Large Eddy Simulation of Aerodynamic Noise Field Around Super High-Rise Buildings[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 748-756. doi: 10.3969/j.issn.0258-2724.20180066
Citation: ZHU Zhiwen, DENG Yanhua. Large Eddy Simulation of Aerodynamic Noise Field Around Super High-Rise Buildings[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 748-756. doi: 10.3969/j.issn.0258-2724.20180066

超高层建筑气动噪声场的大涡模拟

doi: 10.3969/j.issn.0258-2724.20180066
基金项目: 国家重点基础研究发展计划资助项目(2015CB057702);国家自然科学基金资助项目资助(51278191)
详细信息
    作者简介:

    祝志文(1968—),男,教授,博士生导师,研究方向为结构抗风与钢桥疲劳,E-mail:zhuzw@stu.edu.cn

Large Eddy Simulation of Aerodynamic Noise Field Around Super High-Rise Buildings

  • 摘要: 为揭示超高层建筑气动噪声产生的机理及空间分布特征,利用大涡模拟,在大气边界层内求解超高层建筑绕流场,结合FW-H (Ffowcs Williams-Hawkings)方程的声类比法进行了超高层建筑周围声压场的数值模拟. 研究发现:超高层建筑每个面均是偶极子声源,气动噪声是由建筑表面的偶极子声源产生,且受建筑表面风压主导,顺流向和横风向的脉动压力分别主导相应方向的声场辐射强度; 气动噪声沿高度方向先增大后减小,在0.7倍建筑高度附近噪声达到最大值; 在相同高度和离建筑表面相同距离的不同空间点,当空间点面对建筑迎风面时总声压级最大、背风面次之,侧风面最小; 随着空间点与建筑距离的增大,空间点总声压级快速衰减,且横风向较顺风向衰减更快. 研究认为:大涡模拟和声类比相结合的方法能合理预测超高层建筑的气动噪声;优化气动外形,降低建筑表面风压是降噪的最有效途径.

     

  • 图 1  二维圆柱绕流计算域及边界条件

    Figure 1.  Computational domain and boundary conditions of flow around 2D circular cylinder

    图 2  噪声监测点设置

    Figure 2.  Arrangement of noise measuring points

    图 3  计算域网格划分分区布置

    Figure 3.  Computational domain partition and mesh arrangement

    图 4  计算域施加的边界条件

    Figure 4.  Imposed boundary conditions in computational domain

    图 5  噪声测点布置平面图

    Figure 5.  Plan arrangement of noise measuring points

    图 6  入口和模型处平均风速和湍流强度剖面

    Figure 6.  Profile of velocity and turbulence intensity at inlet and in model area

    图 7  建筑表面编号

    Figure 7.  Index of building surfaces

    图 8  建筑面声源产生的声场分布

    Figure 8.  Distribution of sound field produced by sound source on building surfaces

    图 9  测点总声压级及声场曲线的空间特性

    Figure 9.  Spatial characteristics of total sound pressure level at measuring points and sound field curve

    图 10  不同高度声场曲线

    Figure 10.  Curves of sound pressure at different heights

    图 11  测点总声压级的衰减曲线

    Figure 11.  Decay curve of total sound pressure level at measuring points

    表  1  测点总声压级计算结果与文献值比较

    Table  1.   Calculated total sound pressure at measuring points in comparison with reference results

    测点号1234
    文献[11] LES115.4109.3115.4109.1
    本文114.8105.5114.8105.9
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出版历程
  • 收稿日期:  2018-01-23
  • 修回日期:  2018-05-14
  • 网络出版日期:  2018-05-31
  • 刊出日期:  2019-08-01

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