Numerical and experimental research on road traffic noise propagation for various type of road structure and development of environmental noise prediction method

各类道路结构的道路交通噪声传播数值与实验研究及环境噪声预测方法开发

基本信息

批准号：
13650649
负责人：
SAKAMOTO Shinichi
金额：
$ 0.38万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

Though the road traffic is indispensable to our society because it supports the industrial basis, it also causes the serious problems such as the noise or air pollution and it threats our life. Especially, in Tokyo and its suburban areas which have enormous traffic volume, the problem is more serious and precise prediction method of noise environment is strongly required for the urban design. In order to deal with such a noise problem, noise propagation mechanism in the special parts of road structures which is peculiar to urban areas have been analyzed by both of numerical analysis and scale model experiments in this research and the following outcomes have been obtained.[1] Study on sound attenuation effect of various type of noise barriers and embankmentRecently, various types of noise barriers have been developed and adopted on the areas where noise problem is serious. However, the noise prediction method has not been fully examined and its design procedure is not established enoug … More h. In this study, numerical analysis and experimental examination on such types of noise barriers and embankments were performed and the basic quantitative data and knowledge which are effectively applied for making the noise prediction model have been obtained.[2] Applicability of numerical method based on wave theoryNumerical analysis technique based on the wave theory is indispensable for predicting noise environments in the area with geometrical complex. In this research, the applicability of the 2-D numerical analysis to 3-D real environment are quantitatively examined. On the insertion loss of the noise barriers, quantitative difference between 2-D numerical analysis and 3-D experimental values for various sound source conditions have been clarified.[3] Sound source modeling for environmental noise prediction around semi-underground roadsIn order to establish noise prediction method for semi-underground roads, the new concept for sound source model have been proposed in this research and its applicability has been examined by 2-D numerical analysis and 3-D scale model experiments. Furthermore, in order to grasp the noise radiation characteristics from semi-under ground road, an in-situ measurement has been conducted. Less

尽管道路交通对我们的社会来说是必不可少的，因为它支持工业基础，但它也会引起严重的问题，例如噪音或空气污染以及威胁我们的生命。尤其是，在东京及其具有巨大交通量的郊区，城市设计的强烈要求，问题更为严重，更精确的噪声环境预测方法。为了解决这种噪音问题，已经通过数值分析和这项研究中的数值分析和规模模型实验分析了道路结构特殊部分中的噪声传播机制，并且已经获得了以下结果。[1]研究各种噪声障碍和路堤的声音衰减效果的研究，在严重的噪声问题的区域已经开发并采用了各种类型的噪声障碍。但是，噪声预测方法尚未得到充分检查，并且其设计程序的建立不够……更多。在这项研究中，对此类类型的噪声屏障和路堤进行了数值分析和实验检查，并获得了有效地用于制定噪声预测模型的基本定量数据和知识。[2]基于波理论的数值方法的适用性基于波浪理论是必不可少的，对于使用几何复合物预测该区域的噪声环境是必不可少的。在这项研究中，对2-D数值分析对3-D实际环境的适用性进行了定量检查。关于噪声障碍的插入损失，已经阐明了各种声源条件的2-D数值分析与3-D实验值之间的定量差异。[3]在半台地下道路上的环境噪声预测的声音源建模为建立半底线道路的噪声预测方法，在这项研究中提出了声音源模型的新概念，并且已经通过二维数值分析和3-D量表模型实验对其适用性进行了检查。此外，为了掌握半公路的噪声辐射特性，已经进行了原位测量。较少的