Abstract
The noise caused by rail corrugation seriously affects the operation quality of metro vehicles. In this work, the rail corrugation, interior noise and wheel–rail noise of a metro line were tested, and the test results were compared with those after two kinds of treatments. The results show that rail corrugation is the main cause of the abnormal interior noise. The interior noise in many sections exceeds the limit, where clear rail corrugations from 31.5~63 mm are found. When the train passes through the rail corrugation section, the interior noise shows a clear increase, and the maximum increase is higher than 25 dB(A). After increasing the lateral stiffness of the track and rail grinding, the interior noise is reduced by 11.4 dB(A). After a long renovation time, the interior noise is effectively equal to that when the renovation was completed. The research results of this work can provide a reference for rail corrugation treatment and noise control.
Highlights
Analysis and Control MeasuresRailway corrugation refers to the wave-type wear on the wheel–rail rolling contact surface [1,2]
The results indicate that the treatment measures can effectively reduce the interior noise, and the interior noise does not increase again for a long time
The rail corrugation, vehicle interior noise and wheel–rail noise were tested in some sections of a metro line, and the relevant test sections were selected for transformation to explore the impact of rail corrugation on vehicle interior noise
Summary
Railway corrugation refers to the wave-type wear on the wheel–rail rolling contact surface [1,2]. The noise caused by rail corrugation has become an important factor that seriously affects the operational quality of metro. The speed of a metro train is 60~120 km/h, and the main source of its internal noise is the wheel–rail noise [10,11]. Wheel–rail roughness, especially in the case of rail corrugation, is the main excitation source [12,13]. The wheel–rail noise caused by rail corrugation is transmitted to the interior of the train through the air. Feng found that rail corrugation with a 30~50 mm wavelength was the main cause of abnormal vibrations and noise in the test train, using an onsite investigation of corrugation and noise testing in the train [19]. Chen measured in detail the interior noise of the same carriage at different positions and different speeds, and studied the distribution law of the interior
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