轨道交通地下车站环控设备噪声源强测试研究

Research on Noise Source Intensity Testing of Environmental Control Equipment in Underground Rail Transit Stations

为研究城市轨道交通地下车站环控设备噪声源强特性,选取长三角地区多个新风亭、排风亭、活塞风亭和冷却塔等环控设备进行噪声声级和频谱测试。测试结果表明:冷却塔噪声源强>多联机组噪声源强>活塞风亭噪声源强>排风亭噪声源强>新风亭噪声源强。不同类型环控设备的噪声频谱均呈现宽频特性,各类型风亭和多联机组的主频范围覆盖315 Hz~2000 Hz,在630 Hz~800 Hz间存在宽频峰值。冷却塔的噪声频带覆盖500 Hz~2500 Hz,峰值声压级在1600 Hz附近。本次测试旨在为轨道交通地下车站环控设备噪声预测和降噪设计提供一定的数据支撑。

To study the noise source intensity characteristics of urban rail transit environmental control equipment,multiple environmental control equipment such as fresh air pavilions,exhaust pavilions,piston air pavilions,and cooling towers in the Yangtze River Delta region were selected for noise level and frequency spectrum testing.The test results show that cooling tower noise source intensity>multi unit noise source intensity>piston air booth noise source intensity>exhaust air booth noise source intensity>fresh air booth noise source intensity.The noise spectrum of different types of environmental control equipment shows broadband characteristics,and the main frequency range of each type of wind pavilion and multi unit covers 315 Hz~2000 Hz,with broadband peaks between 630 Hz~800 Hz.The noise frequency band of the cooling tower covers 500 Hz~2500 Hz,and the peak sound pressure level is around 1600 Hz.The purpose of this test is to provide certain data support for noise prediction and noise reduction design of environmental control equipment in underground rail transit stations.