A set of acoustic optimization design methods is established by combining the flow field deterioration theory and the acoustic analogy theory,and applied to the acoustic optimization design of high-speed train snow-pl...A set of acoustic optimization design methods is established by combining the flow field deterioration theory and the acoustic analogy theory,and applied to the acoustic optimization design of high-speed train snow-plough.The results show that the streamline bodies of the head/tail car are the most important sound sources,respectively,accounting for 23.7%and 33.7%of the total sound energy.Compared with the streamline body of tail head,the streamline body of head car is more biased towards high frequency for the sound source energy.The A-weighted radiated noise of the train body is characterized by broadband sound(mainly in the range of 1-4 kHz)and peak features(especially at 2 kHz).The snow-plough with the maximum expansion length can mitigate the strong peak effect of the sound at 2 kHz,reduce the total sound energy,and show the best acoustic radiation performance in the four schemes.The numerical computation model was checked by the wind tunnel test results.展开更多
基金Project(ANCL20200302)supported by the Key Laboratory of Aerodynamic Noise ControlProject(JZ2020HGQA0213)supported by the Fundamental Research Funds for the Central Universities,China+2 种基金Project(202010359084)supported by National Training Program of Innovation and Entrepreneurship for Undergraduates,ChinaProject(P2019-J008)supported by the Research on Key Technology of New Generation Fuxing EMU Platform,ChinaProject(2017YFB1201103-02)supported by National key R&D Plan,China。
文摘A set of acoustic optimization design methods is established by combining the flow field deterioration theory and the acoustic analogy theory,and applied to the acoustic optimization design of high-speed train snow-plough.The results show that the streamline bodies of the head/tail car are the most important sound sources,respectively,accounting for 23.7%and 33.7%of the total sound energy.Compared with the streamline body of tail head,the streamline body of head car is more biased towards high frequency for the sound source energy.The A-weighted radiated noise of the train body is characterized by broadband sound(mainly in the range of 1-4 kHz)and peak features(especially at 2 kHz).The snow-plough with the maximum expansion length can mitigate the strong peak effect of the sound at 2 kHz,reduce the total sound energy,and show the best acoustic radiation performance in the four schemes.The numerical computation model was checked by the wind tunnel test results.
