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Technical Strength
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Sources and Suppression Measures of Railway Vehicle Noise
Release time:
2022-08-30
Source:
Xingrong locomotive
When a train is traveling on a railway, there will be various types of noise. Generally speaking, the noise outside the train during operation mainly comes from the following aspects: collision noise between train wheels and rails, friction noise between wheels and rails, friction noise generated when air flows through the surface of the vehicle body, noise generated by friction between contact wire and pantograph, collision noise between car windshields, and compression wave and reflected wave noise generated when the train enters and exits the tunnel.
When a train is traveling on a railway, there will be various types of noise. Generally speaking, the noise outside the train during operation mainly comes from the following aspects: collision noise between train wheels and rails, friction noise between wheels and rails, friction noise generated when air flows through the surface of the vehicle body, noise generated by friction between contact wire and pantograph, collision noise between car windshields, and compression wave and reflected wave noise generated when the train enters and exits the tunnel.
The noise inside a train consists of the following aspects: noise transmitted from outside the train into the train (air noise), surface vibration noise inside the train (structural vibration noise), equipment noise inside the train, personnel noise, and reverberation noise.
Therefore, in order to reduce interior noise and improve passenger comfort, it is necessary to suppress noise from two aspects. On the one hand, it is necessary to suppress the intensity of noise emitted by noise sources, and on the other hand, it is necessary to improve the sound insulation performance of the train body.
1. Measures to suppress the intensity of noise emitted by noise sources
In order to suppress the noise intensity emitted by noise sources, it is necessary to address the issue from the source of the noise.
(1) Noise generated between train wheels and steel rails. Silencers can be installed on the train wheels or elastic wheels can be used.
(2) In response to the noise generated by air friction with the vehicle body, the vehicle can be designed with a streamlined appearance, making the surface of the vehicle as smooth as possible, which is beneficial for reducing air friction noise.
(3) For collision noise at the windshield, rubber windshields can be used instead of iron windshields to reduce the noise generated by the impact of iron components.
(4) In response to the noise inside the car, silencers can be installed in electrical equipment to reduce the noise generated by the operation of electrical components.
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