A Noise Prediction Method for the Surrounding Area of ​​Long Straight Highway Based on Dynamic Traffic Flow

Abstract

The invention discloses a dynamic traffic flow based forecast method of noise in the peripheral zone of a long straight road. According to the method, a microcosmic moving trajectory of a vehicle in a road section is defined accurately, a vehicle source emission model is established, a noise transmission model is established simultaneously, and a complete set of noise forecasting method is obtained. The forecast method comprises steps as follows: (1), dynamic traffic flow simulation vehicle models at a forecast location are classified, and a dynamic traffic flow simulation model is established; and (2), reference radiation sound levels of different vehicle models are determined, meanwhile, traffic composition, range attenuation and noise barrier insertion loss are considered to calculate forecast sound level of the noise, and the forecast sound level is amended with consideration of surface roughness, the slope and the roadside ground type. According to the forecast method, limitation of the conventional noise forecast method is broken through on the basis that correlation research ideas of other subjects are absorbed sufficiently, and the sound level of the noise in a sensitive area can be forecast accurately.

Description

technical field [0001] The invention relates to the field of traffic environment assessment, in particular to the aspect of noise assessment applied to sensitive areas in the above-mentioned fields. Background technique [0002] As the main artery of my country's transportation lines, expressway attracts tens of thousands of traffic flows, and the long straight section is also a typical section of expressway. The degree of noise pollution in the surrounding sensitive areas is expanding year by year with the increasing number of motor vehicles. . [0003] The method of noise prediction is based on the model of the noise source, combined with the theoretical basis of geometrical acoustics and room acoustics, and considering various parameters affecting the sound wave, so as to calculate the continuous equivalent sound level of the acoustic environment sensitive point. The establishment of the model is often based on the needs of the acoustic environment impact assessment. The...

AI Technical Summary

Problems solved by technology

[0004] The invention aims at solving the problem of how to accurately predict the surrounding acoustic environment of the long straight road section of the expressway, aiming at the deficiencies of the noise prediction technology at home and abroad

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