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高速列车车体长度对气动噪声影响的数值研究

莫晃锐 安翼 刘青泉

莫晃锐, 安翼, 刘青泉. 高速列车车体长度对气动噪声影响的数值研究[J]. 力学学报, 2019, 51(5): 1310-1320. doi: 10.6052/0459-1879-19-079
引用本文: 莫晃锐, 安翼, 刘青泉. 高速列车车体长度对气动噪声影响的数值研究[J]. 力学学报, 2019, 51(5): 1310-1320. doi: 10.6052/0459-1879-19-079
Mo Huangrui, An Yi, Liu Qingquan. INFLUENCE OF THE LENGTH OF HIGH-SPEED TRAIN ON THE FAR-FIELD AEROACOUSTICS CHARACTERISTICS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(5): 1310-1320. doi: 10.6052/0459-1879-19-079
Citation: Mo Huangrui, An Yi, Liu Qingquan. INFLUENCE OF THE LENGTH OF HIGH-SPEED TRAIN ON THE FAR-FIELD AEROACOUSTICS CHARACTERISTICS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(5): 1310-1320. doi: 10.6052/0459-1879-19-079

高速列车车体长度对气动噪声影响的数值研究

doi: 10.6052/0459-1879-19-079
基金项目: 1) 中国科学院知识创新工程方向性资助项目(KJCX2-EW-L02-1)
详细信息
    通讯作者:

    刘青泉

  • 中图分类号: O354.1,TB533$^{+}$.2,U260.16,U266

INFLUENCE OF THE LENGTH OF HIGH-SPEED TRAIN ON THE FAR-FIELD AEROACOUSTICS CHARACTERISTICS

  • 摘要: 高速列车具有细长形状, 数值评估气动噪声往往需要巨大的计算量.目前对高速列车气动噪声的数值模拟大多基于对简化短编组列车的评估,而实际列车通常具有较长的8$\sim$16节编组.如何基于现有条件合理评价真实长度列车的气动噪声,是一个急需探讨的问题. 本文应用非线性声学求解器(NLAS)和FW--H声学比拟法的混合算法, 先求解噪声积分面上的声场脉动,再进行远场积分, 引入多噪声面积分技术,通过对三种不同长度(3节、4节、6节)列车模型的气动性能和噪声数值模拟,分析了车体长度对列车气动噪声的影响. 结果表明,同一列车模型的各节车厢具有相似的沿线噪声分布,其噪声曲线在量值上十分接近,只是主峰位置会随着车厢空间位置的不同而相应地发生偏移;不同长度编组列车对应部位之间的远场噪声特性具有较强的关联性,它们的远场噪声具有接近的总声压级和噪声频谱.通过利用短编组计算数据进行分解、平移和叠加,成功重构了4编组和6编组列车远场噪声特性,与直接计算结果相比误差在可接受范围内.由此发展了基于短编组列车噪声的数值结果,重构长编组列车沿线噪声的近似评估方法.

     

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出版历程
  • 收稿日期:  2019-03-03
  • 刊出日期:  2019-09-18

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