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Method for calculating traffic noise of bus station in consideration with bus running states

A technology of traffic noise and driving status, which is applied in the fields of traffic noise prediction and queuing theory, which can solve the problems of comprehensively considering the impact of bus traffic noise, and achieve the effect of ensuring accuracy and improving accuracy

Active Publication Date: 2017-03-22
SUN YAT SEN UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Most of the current bus noise calculations focus on the noise emission characteristics of the bus in a certain state
It is impossible to comprehensively consider the traffic noise impact brought by the whole process of uniform speed, deceleration, idling and acceleration of buses at and near the bus station

Method used

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  • Method for calculating traffic noise of bus station in consideration with bus running states
  • Method for calculating traffic noise of bus station in consideration with bus running states
  • Method for calculating traffic noise of bus station in consideration with bus running states

Examples

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Embodiment 1

[0054] Step 1: For a single bus, the four state processes of constant speed, deceleration, idle speed and acceleration are continuous. Such as figure 2 As shown, assuming that the bus is traveling at a constant speed on the -∞1 ) decelerates, the parking point is at O, and then goes through the OB road section (the distance of the OB road section is l 2 ) during the acceleration process. The bus stops at the station for T S .

[0055] Step 2: Let the x-coordinate of the center point of the rightmost parking space be 0, and the x-coordinate of each parking space center point from right to left be -s(i-1), i=1,2,...,j,j is the number of parking spaces, s is the distance between the center points of any two parking spaces, time t=0 at parking point O.

[0056] Step 3: Calculate the equivalent sound level of the noise receiving point R with spatial coordinates (X, Y, Z) when the bus is running at a constant speed:

[0057]

[0058] Among them, L 0 is the intensity of the...

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Abstract

The invention provides a method for calculating traffic noise nearby a bus station in consideration with bus running states. The method specifically comprises the steps of: 1) in consideration with frequent uniform running, decelerating, idling and accelerating processes of buses nearby the bus station, performing subsection modeling on different bus running states, and calculating traffic noise of a single bus nearby the bus station; 2) establishing a bus stop model based on a queuing theory, and calculating buses stopping at each berth of the bus station within a unit time; 3) calculating traffic noise of all buses at all berths within the unit time by using the acoustic energy superposition principle; and 4) in consideration with the influence of other vehicles on the road within the unit time, obtaining a general form of calculating the total traffic noise value nearby the bus station. The method is applied to traffic noise calculation of mixed vehicle flow nearby the bus station, and solves the problem that the traffic noise nearby the bus station is difficult to accurately calculate due to variable bus running states.

Description

technical field [0001] The invention relates to the technical field of traffic noise prediction and queuing theory, in particular to a traffic noise calculation method at a bus station considering the driving state of a bus. Background technique [0002] Prioritizing the development of urban public transport is an important means to improve the utilization efficiency of transport resources and alleviate traffic congestion, and it is the fundamental way to solve the current urban traffic problems. As a kind of public transportation, the bus brings the problem of noise pollution while facilitating people's life. Due to the impact of bus stops, the noise of mixed traffic flow including buses is more sudden and penetrating, seriously affecting people's lives. [0003] Most countries use macro-models in traffic noise prediction. Such as the FHWA model of the US Federal Highway Administration, the CRTN model of the United Kingdom, the RLS model of Germany, and the MITHRA model o...

Claims

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Application Information

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IPC IPC(8): G08G1/01
CPCG08G1/0104
Inventor 王海波蔡铭李静
Owner SUN YAT SEN UNIV
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