Зависимость эквивалентного уровня звука от шумовых характеристик транспортного потока
| Jazyk: | ruština |
|---|---|
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Вісник Придніпровської державної академії будівництва та архітектури. |
| ISSN: | 2312-2676 |
| Popis: | Дано описание обработки экспериментально полученных данных методами математической статистики с применением элементов регрессионного анализа. Указан также порядок предварительных операций: исследование данных на выбросы и проверка их на нормальность. Далее представлены результаты математического исследования. Сделан вывод об основных шумовых характеристиках движущегося потока автомобильного имеющих наибольшее влияние на эквивалентный уровень звука. Problem statement. During the scientific investigation on the equivalent loudness level some theoretical and practical experiments were carried out. The object of research was traffic flow. Noise characteristics such as speed, quantitative and qualitative flow composition, time of the day, road surface and geometrical characteristics such as width of carriageway and the number of traffic lanes. Taking into account all the parameters we get the multivariate sample. In order to make a conclusion about the degree of interaction between all the parameters, it is necessary to study their correlation. This task can be achieved by using mathematical statistical methods, in particularly by the regression analysis. Analyzing of the resent research. Attempts to produce a mathematical theory of traffic flow dateback to the 1920s, when Frank Knight first produced an analysis of traffic equilibrium, which was refined into Wardrop's first and second principles of equilibrium in 1952.A lot of scientists all over the world such as R. Kartabaev, V. Syl'yanov, F. Kheyta, D. Dryu et al. were working on the problem of the equivalent loudness level calculation. However, their research was being conducted long ago. In the modern world the new model for the traffic noise calculation is required.To study an interaction all parameters are divided into two categories: factorial and resultant. The factorial one causes the change of the other relevant parameters. Resultant is changed under the action of the factorial parameters.In current research factorial parameters are speed, flow intensity, width of carriageway, road inclination coefficient and the number of traffic lanes. As a resultant parameter we take the measured equivalent loudness level.Research objective. The aim of the article is to detect the range of traffic flow noise characteristics influence on the resultant equivalent loudness level. Conclusions. The specification of experimentally obtained data is given, that is made by using mathematical statistical methods including regression analysis. The order of preliminary operations is described: outlier finding and normalization check. Then the results of mathematical investigation are shown. At the end there is a conclusion about the main noise traffic flow characteristics having the major influence upon the equivalent loudness level.During the investigation was detected that the most influencing factors on the equivalent loudness level are traffic speed and intensity. Less influencing, but also important parameters are road surface and geometrical characteristics such as width of carriageway and the number of traffic lanes. In order to calculate equivalent loudness levels exactly we have to take all these parameters into account. |
| Databáze: | OpenAIRE |
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