Prediction of Transfer force of Railway Air Compressor Using Transfer Path Analysis

Abstract

Urban rapid transit systems are one of the most popular transportation methods. They are equipped with large-capacity air compressors because pneumatic pressure is required to supply power for braking and door opening and closing. To deal with passenger complaints regarding the vibration and noise generated during the operation of the air compressor, the following were considered. The excitation force generated in an air compressor mounted on a railway car was first indirectly measured. To accurately predict the excitation force transmitted to the mount rubber, the impedance matrix method technique that uses acceleration and the inverse of the transfer functions was applied. Further investigation was conducted to determine the proper position to measure the acceleration. Then, the calculated results for the transmitting forces were compared with the directly measured values. © 2019 The Korean Society for Railway. All rights reserved.