Objective Metro vehicle interior noise affects passenger comfort, with the air-conditioning system causing an undeniable impact. Therefore, it is necessary to study related issues to improve passenger’s riding experience. Method Using the SEA (statistical energy analysis) method, a simulation model for metro vehicle interior noise is established, and simulated calculations are performed based on field-measured sound source data from air-conditioning units. The impact of air-conditioning units on interior noise and optimization methods are investigated. Result & Conclusion The results indicate that under static conditions, air-conditioning noise has the greatest impact on vehicle interior noise. Under operating conditions, due to the influence of traction system noise on the trailer cars, the impact of air-conditioning system on interior noise in trailer cars is greater than in motor cars. As metro operating speed increases, wheel-rail noise becomes the main component, reducing the impact of air-conditioning on interior noise. The air-conditioning system mainly affects interior noise in the mid-to-low frequency range below 400 Hz, while frequency components above 400 Hz are primarily caused by wheel-rail noise and traction system noise. Since the air supply outlet of metro vehicle air-conditioning system contributes significantly to interior noise, optimizing the air supply outlet can significantly reduce interior noise levels.


    Access

    Download


    Export, share and cite



    Title :

    Impact of Air-conditioning Systems on Metro Vehicle Interior Noise and Optimization Analysis


    Contributors:
    SHI Meng (author) / LIU Linlin (author) / ZAOU Fei (author)


    Publication date :

    2024




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Vehicle interior climate conditioning

    PILSGAARD MADS / ZETTERBERG JORGEN | European Patent Office | 2022

    Free access


    Identification of structure borne noise contribution of air conditioning compressor to vehicle interior noise

    Romano, J. / Lopez, J. A. / Katholieke Universiteit Leuven | British Library Conference Proceedings | 1994