高速公路声屏障仿真模拟与优化设计研究
发布时间：2018-07-14 08:20
【摘要】：随着我国高速公路的快速发展，交通噪声已经严重干扰了沿线居民的正常生活、工作和学习。作为一种经济且有效的降噪方法，声屏障成为控制高速公路交通噪声的主要措施，声屏障的参数，如长度、高速和设置位置，决定了声屏障的降噪效果和建造成本。本文对声屏障的设置参数进行优化研究，不仅可以提高声屏障的降噪效果，还可以降低声屏障的建造成本。 本研究采用Cadna/A噪声模拟软件就该软件在高速公路上的适用性进行了研究与探讨，模拟结果显示：预测值与实测值有一定的偏差但偏差不大且两者的变化规律是相同的，因此可以认为该软件在高速公路上是适用的。 利用噪声模拟软件对直立型、T型和内倾型声屏障的降噪效果进行模拟，，结果显示：T型声屏障比较适合于受声点位置较低处的噪声控制措施，内倾型声屏障适合于受声点位置较高处的噪声控制措施。 同时，本文选取一种直立型声屏障作为优化对象。根据长湘高速公路周边敏感点的分布情况，构建了现实的模拟场景，利用Cadna/A噪声模拟软件建立高速公路声屏障降噪预测模型，对该类型声屏障的设置参数进行了优化设计，并将该优化设计成果用来指导长湘高速公路所选路段声屏障的设置。研究结果显示：在现实的高速公路模拟场景中，当右侧声屏障设置长度为440m高为3.6m，左侧声屏障设置长度为400m高为4.4m时，该类型声屏障不仅可以有效的控制噪声污染使所有敏感建筑物均达标，且实现了声屏障建设成本的最小化，该研究可以为工程设计提供理论依据。 声屏障设置之后，通过现场实测噪声值，所有敏感点均达标。但是同时也发现软件预测值和现场实测值之间存在一定的偏差，软件预测值跟现场实测值相比偏高，造成这种结果的原因主要是软件参数设定、背景噪声值、声屏障漏声等因素造成的。
[Abstract]:With the rapid development of highway in China, traffic noise has seriously disturbed the normal life, work and study of residents along the route. As an economical and effective noise reduction method, noise barrier is the main measure to control highway traffic noise. The noise reduction effect and construction cost are determined by the noise barrier parameters, such as length, high speed and location. In this paper, the optimization of the noise barrier parameters is studied, which can not only improve the noise reduction effect of the noise barrier, but also reduce the construction cost of the noise barrier. In this study, Cadna / A noise simulation software was used to study and discuss the applicability of the software on expressway. The simulation results show that the predicted value and the measured value have a certain deviation, but the deviation is small and the law of change is the same. Therefore, it can be considered that the software is applicable on the highway. The noise reduction effects of vertical and introverted type noise barriers are simulated by using the noise simulation software. The results show that the noise control measures of the noise barrier with the ratio of 1: T type are more suitable for the noise control at the lower position of the noise point. The inclined-type sound barrier is suitable for noise control in the higher position of the sound point. At the same time, an upright sound barrier is chosen as the optimization object. According to the distribution of sensitive points in the periphery of Changxiang Expressway, a realistic simulation scene is constructed. The noise reduction prediction model of highway noise barrier is established by Cadna / A noise simulation software, and the setting parameters of this type of noise barrier are optimized and designed. The optimized design result is used to guide the setting of the noise barrier in the selected section of Changxiang Expressway. The results show that in the real highway simulation scene, when the length of the right side noise barrier is 440 m high is 3.6 m, the left side noise barrier setting length is 400m high is 4.4 m, This type of noise barrier can not only effectively control the noise pollution so that all sensitive buildings meet the standards, but also achieve the minimum construction cost of the noise barrier. This study can provide theoretical basis for engineering design. After setting up the sound barrier, all the sensitive points are up to standard through the measured noise value on the spot. But at the same time, it is also found that there is a certain deviation between the software prediction value and the field measured value. The software prediction value is higher than the field measured value. The main reasons for this result are software parameter setting, background noise value. Sound barrier leakage and other factors caused by.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.91;U417
本文编号：2121043
[Abstract]:With the rapid development of highway in China, traffic noise has seriously disturbed the normal life, work and study of residents along the route. As an economical and effective noise reduction method, noise barrier is the main measure to control highway traffic noise. The noise reduction effect and construction cost are determined by the noise barrier parameters, such as length, high speed and location. In this paper, the optimization of the noise barrier parameters is studied, which can not only improve the noise reduction effect of the noise barrier, but also reduce the construction cost of the noise barrier. In this study, Cadna / A noise simulation software was used to study and discuss the applicability of the software on expressway. The simulation results show that the predicted value and the measured value have a certain deviation, but the deviation is small and the law of change is the same. Therefore, it can be considered that the software is applicable on the highway. The noise reduction effects of vertical and introverted type noise barriers are simulated by using the noise simulation software. The results show that the noise control measures of the noise barrier with the ratio of 1: T type are more suitable for the noise control at the lower position of the noise point. The inclined-type sound barrier is suitable for noise control in the higher position of the sound point. At the same time, an upright sound barrier is chosen as the optimization object. According to the distribution of sensitive points in the periphery of Changxiang Expressway, a realistic simulation scene is constructed. The noise reduction prediction model of highway noise barrier is established by Cadna / A noise simulation software, and the setting parameters of this type of noise barrier are optimized and designed. The optimized design result is used to guide the setting of the noise barrier in the selected section of Changxiang Expressway. The results show that in the real highway simulation scene, when the length of the right side noise barrier is 440 m high is 3.6 m, the left side noise barrier setting length is 400m high is 4.4 m, This type of noise barrier can not only effectively control the noise pollution so that all sensitive buildings meet the standards, but also achieve the minimum construction cost of the noise barrier. This study can provide theoretical basis for engineering design. After setting up the sound barrier, all the sensitive points are up to standard through the measured noise value on the spot. But at the same time, it is also found that there is a certain deviation between the software prediction value and the field measured value. The software prediction value is higher than the field measured value. The main reasons for this result are software parameter setting, background noise value. Sound barrier leakage and other factors caused by.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.91;U417
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