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Method and apparatus for measuring and calculating train noise in tunnel and storage medium

An in-tunnel, noise technology, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of no prediction mode of noise in the tunnel, inability to have accuracy and forward-looking at the same time, to improve accuracy, The effect of improving accuracy and reducing computational complexity

Inactive Publication Date: 2018-10-19
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there is currently no noise prediction method in high-speed railway tunnels. The existing methods are basically numerical simulation or on-site measurement, which cannot be accurate and forward-looking at the same time.
The existing noise prediction methods are mainly for the noise of the open section of the railway line or the noise of the bridge section, and there is no prediction mode for the noise in the tunnel

Method used

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  • Method and apparatus for measuring and calculating train noise in tunnel and storage medium
  • Method and apparatus for measuring and calculating train noise in tunnel and storage medium
  • Method and apparatus for measuring and calculating train noise in tunnel and storage medium

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no. 1 example

[0028] According to the applicant's research, it is found that the existing train noise measurement methods are mainly for the noise of the open section of the railway line or the noise of the bridge section, and there is no prediction mode for the noise in the tunnel. At the same time, the existing technology mostly equates the wheel-rail noise to a line sound source, and there is a large error in the tunnel environment, which will make the final calculated train noise in the tunnel inconsistent with the actual situation, resulting in engineering errors. In order to solve the above problems, the first embodiment of the present invention provides a method for measuring and calculating train noise in a tunnel, please refer to figure 1 , figure 1 It is a flow chart of a method for measuring and calculating train noise in a tunnel provided by the first embodiment of the present invention. The specific steps of the train noise measurement and calculation method in the tunnel can ...

no. 2 example

[0052] In order to cooperate with the method for measuring and calculating train noise in a tunnel provided by the first embodiment of the present invention, the second embodiment of the present invention further provides a device 100 for measuring and calculating train noise in a tunnel.

[0053] Please refer to Figure 4 , Figure 4 It is a block diagram of a train noise measuring and calculating device in a tunnel provided by the second embodiment of the present invention.

[0054] The train noise measurement and calculation device 100 in the tunnel includes a sound source division module 110 , a virtual room determination module 120 and a noise calculation module 130 .

[0055] The sound source division module 110 is used to divide the noise sources of trains in the tunnel into wheel-rail sound sources at the lower part of the car body, aerodynamic line sound sources at the middle part of the car body, and current collection system sound sources at the upper part of the c...

no. 3 example

[0063] In order to realize the above-mentioned method for measuring and calculating train noise in a tunnel, the third embodiment of the present invention provides an electronic device 200 . Please refer to Figure 5 , Figure 5 It is a structural block diagram of an electronic device provided by the third embodiment of the present invention.

[0064] The electronic device 200 may include a train noise measuring device 100 in a tunnel, a memory 201 , a storage controller 202 , a processor 203 , a peripheral interface 204 , an input and output unit 205 , an audio unit 206 , and a display unit 207 .

[0065] The memory 201, storage controller 202, processor 203, peripheral interface 204, input and output unit 205, audio unit 206, and display unit 207 are electrically connected to each other directly or indirectly to realize data transmission or interact. For example, these components can be electrically connected to each other through one or more communication buses or signal...

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Abstract

The invention provides a method and apparatus for measuring and calculating train noise in a tunnel and a storage medium and relates to the technical field of high speed train noise prediction. The method for measuring and calculating train noise in the tunnel comprises the following steps: train noise sources in the tunnel are divided into wheel-rail sound sources in a lower part of the vehicle body, aerodynamic line sound sources in a middle part of the vehicle body, and a current collection system sound source in an upper part of the vehicle body; a longitudinal section where a middle pointbetween adjacent first and second carriages is positioned is determined as a virtual wall, and a virtual room is formed via enclosure of the virtual wall and a surrounding wall of the tunnel; a soundpressure level of superimposed noise of the wheel-rail sound sources, the aerodynamic line sound sources, and the current collection system sound sources at a prediction point is calculated based onthe virtual wall. According to the method for measuring and calculating train noise in the tunnel, a plurality of sound source on a train are regarded as point sound sources via arrangement of the virtual room, the sound pressure level is obtained after noise of the point sound sources is superimposed at the prediction point, and prediction accuracy is improved when a noise measurement and calculation quantity is small.

Description

technical field [0001] The present invention relates to the technical field of high-speed train noise prediction, in particular to a method, device and storage medium for measuring and calculating train noise in a tunnel. Background technique [0002] With the acceleration of urbanization and the rapid development of social economy, the scale of my country's high-speed railway and other high-speed railway operation systems is becoming larger and larger. During the high-speed running of the high-speed railway, due to the friction between the train wheel rail and the track, and the friction between the middle part of the car body and the air Friction and the friction between the pantograph of the current collection system and the air will generate a lot of noise, which will interfere with nearby people when the high-speed train travels close to residential areas or other densely populated areas. At the same time, when the train is running in a closed tunnel, the above-mentioned...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 郭春张振华杨璐杨鶤
Owner SOUTHWEST JIAOTONG UNIV
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