基于Cadna/A软件的城市道路噪声模拟  

Simulated study for urban road traffic noise control via software known as Cadna/A

作　　者：刘珊珊 陈郁[2] 郑洪波[2] 嵇囡囡 LIU Shan-shan;CHEN Yu;ZHENG Hong-bo;JI Nan-nan(Dalian University of Technology Can-sino Environmental Technology Co.,Ltd.,Dalian 116024,Liaoning,China;Key Laboratory of Industrial Ecology and Environmental Engineering,School of Environmental Science and Technology,Dalian University of Technology,Dalian116024,Liaoning,China)

机构地区：[1]大连理工加华环境科技有限公司,辽宁大连116024 [2]大连理工大学环境学院工业生态与环境工程教育部重点实验室,辽宁大连116024

出　　处：《安全与环境学报》2019年第6期2095-2101,共7页Journal of Safety and Environment

摘　　要：以受城市道路噪声影响的某高层住宅楼群为例,研究城市道路交通噪声对其横向和垂向影响。首先在Cadna/A软件中建立住宅楼和道路分布的三维仿真模型,其次根据研究对象1#~7#建筑物中13个代表性监测点位的实际环境噪声现状监测数据对软件中的建筑物、道路等各个计算模块中的相关参数进行校核,并依据实际条件和相关规范标准,通过多次反向调参过程,得到模型模拟值与实际环境噪声现状监测数据的误差值小于0. 5 d B(A),即模拟精度达到99%以上,且更接近于真实声学环境的模拟环境。在此基础上,根据道路近期交通设计指标,预测模拟道路噪声对1#~7#建筑物群的时空分布噪声影响。结果表明,1#~7#住宅楼群受道路交通噪声影响在昼间达标,但在夜间存在达标和超标楼层,超标楼层主要集中在第2~6层,其中最大超标值为1. 8d B(A),从而提出相应的降噪措施,如采用降噪路面。This article is devoted to an investigation of the impact of the urban road traffic noise propagating in the horizontal direction and vertical direction by taking its impact on the highrise residential buildings as a case study sample. The first step in the research process is to create a 3-D simulation model of the residential buildings and road distribution via the software known as Cadna/A. The second step in the research process is to collect an actual environmental noise monitoring data of the 13 representative noise monitoring points originated from the research objects from No. 1 to No. 7 Buildings,with their checking function to check the relevant parameters of each calculation module,i. e.,buildings and roads and computational grids,etc. in accordance with the physical conditions and relevant standards.The proper reverse parametric adjustments indicate that the simulated environment of the model can achieve an accuracy of 99%and even closer to the actual acoustic environment. In other words,the error rate can be reduced by less than 0. 5 d B(A)between the actual environmental noise monitoring data and that of the analog data. With such a kind of accuracy,once established,the model can be adopted to predict the impact of the simulated urban road traffic noise on the spatial and temporal distribution of the noise of No. 1-No. 7 Buildings based on the up-todate urban road traffic noise indicators. The results of the above mentioned prediction tend to demonstrate that it would be possible for the residential buildings to reduce the affected road traffic noise by the urban standard during the day hours,though there also exists noise standard for the upfloor buildings at night. Statistically speaking,the noise level for the upper floors of the high rises is mainly concentrated between the 2 nd through the 6 th floor,whose maximalized noise level can be so high as to 1. 8 d B(A),to which the paper has proposed a series of appropriate noise reduction measures, including the quiet environmental pavement. Thus,it

关 键 词：环境学 声学 预测参数 模拟精度 Cadna/A软件 

分 类 号：X827[环境科学与工程—环境工程]