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ZHANG Ya-dong, ZHANG Ji-ye, LI Tian. Contribution analysis of aerodynamic noise of high-speed train[J]. Journal of Traffic and Transportation Engineering, 2017, 17(4): 78-88.
Citation: ZHANG Ya-dong, ZHANG Ji-ye, LI Tian. Contribution analysis of aerodynamic noise of high-speed train[J]. Journal of Traffic and Transportation Engineering, 2017, 17(4): 78-88.
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Contribution analysis of aerodynamic noise of high-speed train

  • State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

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  • Author Bio:

    ZHANG Ya-dong(1987-), male, doctoral student, +86-28-86466040, aliyzyd@163.com

    ZHANG Ji-ye(1965-), male, professor, PhD, +86-28-86466040, jyzhang@home.swjtu.edu.cn

  • Received Date: 2017-02-09
  • Publish Date: 2017-08-25
    Abstract
  • The calculation model of aerodynamic noise of CRH380 Bhigh-speed train with 3 vehicles was established, including some detailed geometries such as six bogies, two windshields, three air conditioning units and one DSA380 pantograph. The aerodynamic noise sources of high-speed train were identified by the broadband noise source model based on the Lighthill acoustic theory. The near-field unsteady flow around the high-speed train was analyzed by using the large-eddy simulation based on the high-order finite difference method. The aerodynamic noise of high-speed train was predicted by using the Ffowcs Williams-Hawkings acoustic analogy theory. Computation result shows that the maximum deviation of calculated result of far-field aerodynamic noise and wind tunnel test result is 1.45 dBA, so the calculation model is accurate. The order based on the aerodynamic noise contribution amounts from large to small is bogie system (six bogies), inter-coach spacing (two windshields), pantograph and air conditioning unit, and the numerical values are 83.58, 79.31, 74.08 and 59.71 dBA, respectively. The aerodynamic noisecontribution amount of train in the knuckle-downstream direction of pantograph is less than the value in the knuckle-upstream direction of pantograph, and the maximum sound pressure level (SPL) and the average SPL are 0.40 dBA and 0.31 dBA, respectively. The aerodynamic noise contribution of the first bogie of head car is biggest and is 79.73 dBA. From large to small in turn, the order based on the aerodynamic noise contribution amounts of pantograph is carbon skateboard, balance arm, panhead support, chassis, insulators, lower arm rod, knuckle, upper arm rod, pull rod and balance rod, and the numerical values are 97.95, 93.02, 86.63, 82.07, 79.46, 76.85, 72.43, 66.63, 62.02 and 54.22 dBA, respectively. At 350 km·h-1, the dominant frequency of aerodynamic noise of pantograph exists 305, 608 and 913 Hz that are resulted from the aerodynamic noise contribution because of panhead's vortex shedding.

     

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