Method for predicting traffic noise of rail regions

Abstract

The invention provides a method for predicting traffic noise of rail regions. The method comprises the following steps: dividing a test system into multiple subsystems and establishing corresponding sub-vibration equations; establishing a general vibration equation according to a coordination relation among multiple sub-vibration equations; calculating the sound source intensity of a region to be measured on the basis of the vibration equations and test parameters; drawing a corresponding noise map of the region to be measured on the basis of a noise map drawing unit and the sound source intensity, in order to predict the traffic noise of urban rail regions based on the noise map, wherein the sound source intensity is calculated on the basis of vibration responses of a coupled system (including a vehicle system, a rail system, a bridge-pile system and an environment soil system), so that the calculation results are accurate and reasonable, and are suitable for various vehicles and elevated rail structures; according to the method for predicting traffic noise of rail regions draws, the traffic noise of the region to be measured is drawn into the noise map, so that the noise management and control, the noise environment impact assessment, the public participation and the solution decision of the urban rail transit in our country become intuitive and convenient.

Description

technical field [0001] The invention relates to the field of environmental noise, in particular to a method for predicting traffic noise in rail areas. Background technique [0002] my country currently adopts the "noise prediction model" proposed in the "Technical Guidelines for Environmental Impact Assessment-Urban Rail Transit" standard to calculate noise problems, and take corresponding vibration and noise reduction measures for sections that do not meet the standards. [0003] In engineering practice, the noise prediction mode adopts a more conservative prediction mode. The above guidelines and standards use the 2006 version of the Ministry of Communications specification prediction model FWHM mode - noise source intensity at 15 meters or the 2006 version of the Ministry of Communications specification - 7.5 meters noise source intensity for noise prediction, calculate the calculation results of environmental vibration and noise, and then according to the calculation A...

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Problems solved by technology

[0004] The inventor found in the research that the track structure of each city and the track structure of each region have different track structures in different sections of each region, and with the development of technology, the track of new structure will be released, so some The sound source intensity of the common ordinary track structure is used as the reference point sound source intensity for prediction and calculation. Since the reference point sound source intensity has not formed a unified standard, the calculation results are often inaccurate

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