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
Fully Automatic Operation System Based on Autonomic Perception and Vehicle-to-vehicle Communication Technology
Objective The fully automatic operation(FAO)line based on traditional vehicle-ground communication technology faces problems such as insufficient capacity at peak time, complex and numerous system equipment, and wide r...
Deep Energy-saving and Consumption Reduction Strategies for Urban Rail Transit
Objective With the increase in urban rail transit operational lines and operating hours, electrical energy consumption rises annually. To reduce energy consumption and operational costs, it is essential to conduct in-dep...
Numerical Simulation Analysis of Cleanable Uniform Air Ducts in Metro Vehicles
Objective With the increasing demand of passengers for air quality and uniform air supply in metro train interiors, it is necessary to study how to improve the uniformity of cleanable air supply in metro vehicles. Method...
Design Schemes for FAO Line Intelligent Operation and Control Systems
Objective With the rapid development of technologies in urban rail transit equipment industry and the continuous maturation of their application, the automation level of urban rail transit operations is steadily increasi...
Research on Urban Rail Transit Service Quality Evaluation Based on Passenger Demand
Objective Evaluation of urban rail transit service quality based on passenger demand not only promotes service quality improvement and enhances passenger satisfaction with travel, but also contributes to economic and soc...