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

Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 5

Abstract

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.

Authors and Affiliations

Meng SHI, Linlin LIU, Fei ZAOU

Keywords

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  • EP ID EP735624
  • DOI 10.16037/j.1007-869x.2024.05.021
  • Views 32
  • Downloads 0

How To Cite

Meng SHI, Linlin LIU, Fei ZAOU (2024). Impact of Air-conditioning Systems on Metro Vehicle Interior Noise and Optimization Analysis. Urban Mass Transit, 27(5), -. https://europub.co.uk/articles/-A-735624