随着经济的发展,我国城市呈现高密度特点,高层建筑交通噪声干扰日益严峻。既有对高层建筑交通噪声的研究大多关注建筑本身的噪声分布,忽略对主要产生噪声的路段在空间中的定位。首先对道路细分,模拟计算细分单元对接受点的噪声贡献值,...随着经济的发展,我国城市呈现高密度特点,高层建筑交通噪声干扰日益严峻。既有对高层建筑交通噪声的研究大多关注建筑本身的噪声分布,忽略对主要产生噪声的路段在空间中的定位。首先对道路细分,模拟计算细分单元对接受点的噪声贡献值,将较最大声压级差值在10 d B内的细分路段作为噪声主要贡献路段。随之构建多场景,比较发现噪声主要贡献路段的长度随道路距建筑距离的增加而增大,随接受点高度的增加而先减小后增加。道路距离对其影响更加显著。以反映空间位置关系的变量为因变量,得到噪声主要贡献路段长度的回归方程。成果可促使建筑规划设计中各种降噪措施的精准实施。展开更多
This paper presents an investigation into the characteristics of interior noise of a Chinese high-speed train under several typical conditions. Interior noises within Vehicle TC01, which can be used as a head car or a...This paper presents an investigation into the characteristics of interior noise of a Chinese high-speed train under several typical conditions. Interior noises within Vehicle TC01, which can be used as a head car or an end car, and Vehicle TP03, the third car counting from TC01, are measured for the train running at speeds from 260 km/h to 385 km/h, along two types of track including a slab track and a ballast track and either on the ground surface or in a tunnel. Data analyses are performed for sound pressure overall levels, frequency, area contributions, and possible generation mechanisms, showing how they are affected by train speed, running direction, track type, and tunnel. The results show that, whether TC01 is used as head car or end car, the interior noise characteristics in the VIP cabin are mostly related to aerodynamic noise. Differences in interior noise between tracks become smaller as the train speed increases. The effect of a tunnel on the interior noise is more important for the middle coach than that for the head coach. This study can provide a basis for noise control of high-speed trains.展开更多
文摘随着经济的发展,我国城市呈现高密度特点,高层建筑交通噪声干扰日益严峻。既有对高层建筑交通噪声的研究大多关注建筑本身的噪声分布,忽略对主要产生噪声的路段在空间中的定位。首先对道路细分,模拟计算细分单元对接受点的噪声贡献值,将较最大声压级差值在10 d B内的细分路段作为噪声主要贡献路段。随之构建多场景,比较发现噪声主要贡献路段的长度随道路距建筑距离的增加而增大,随接受点高度的增加而先减小后增加。道路距离对其影响更加显著。以反映空间位置关系的变量为因变量,得到噪声主要贡献路段长度的回归方程。成果可促使建筑规划设计中各种降噪措施的精准实施。
基金Project supported by the National Natural Science Foundation of China （Nos. 51475390 and U 1434201）, the National Key Technology R＆D Program of China （Nos. 2016YFB1200506-08 and 2016YFB1200503-02）, and the Scientific Research Foundation of State Key Laboratory of Traction Power （No. 2015TPL_T08）, China
文摘This paper presents an investigation into the characteristics of interior noise of a Chinese high-speed train under several typical conditions. Interior noises within Vehicle TC01, which can be used as a head car or an end car, and Vehicle TP03, the third car counting from TC01, are measured for the train running at speeds from 260 km/h to 385 km/h, along two types of track including a slab track and a ballast track and either on the ground surface or in a tunnel. Data analyses are performed for sound pressure overall levels, frequency, area contributions, and possible generation mechanisms, showing how they are affected by train speed, running direction, track type, and tunnel. The results show that, whether TC01 is used as head car or end car, the interior noise characteristics in the VIP cabin are mostly related to aerodynamic noise. Differences in interior noise between tracks become smaller as the train speed increases. The effect of a tunnel on the interior noise is more important for the middle coach than that for the head coach. This study can provide a basis for noise control of high-speed trains.
