Effects of pantograph recess on aerodynamic noise in pantograph area

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (23) : 216-222.

SHI Jiawei, GE Shuai, SHENG Xiaozhen

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Abstract

Using the three-dimensional incompressible large eddy simulation(LES) model combined with the Ffowcs Williams-Hawkings(FW-H) equation, the flow field and aerodynamic noise of pantograph area under external installation and sinking installation mode are simulated. Based on this, the effects of pantograph recess on flow field and aerodynamic noise are further analyzed. The results show that the pantograph recess could significantly influence the airflow state around pantograph, and then the intensity and distribution of aerodynamic noise source on the pantograph surface are changed. In addition, the noise radiated to both sides of the track is dominated by pantograph itself under the two installation mode. Also, compared with the raised-pantograph, the pantograph recess has a better noise reduction effect on the aerodynamic noise of the folded-pantograph.

Key words

high speed train / pantograph / pantograph recess / large eddy simulation / aerodynamic noise;

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SHI Jiawei, GE Shuai, SHENG Xiaozhen. Effects of pantograph recess on aerodynamic noise in pantograph area[J]. Journal of Vibration and Shock, 2021, 40(23): 216-222

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