下沉式广场冷却塔噪声数值仿真模拟

Noise Simulation of Subsidence Cooling Tower

在冷却塔四周设置声屏障能有效地降低噪声对周边环境的影响。冷却塔采取下沉式安装方式时下沉式高度也会影响其噪声传播。为了研究声屏障高度、安装位置和下沉式广场下沉高度等三个因子对冷却塔噪声的影响,基于声线跟踪法对冷却塔噪声进行了数值仿真模拟。噪声模拟结果与现场实测数值相比,频谱特性变化趋势类似,最大相对误差为8%。在本研究中,运用正交试验法将代表性受声点的声衰减量确定为试验目标,仿真模拟出16种不同情况下的冷却塔声场。发现声影区外受声屏障高度影响显著,声影区内受下沉式广场高度影响显著。此外,还通过线性回归分析总结出声影区内和声影区外噪声衰减量的公式。两个公式的R^(2)值分别达到了76%和97.4%。

Sound barriers installed in cooling towers can effectively reduce the impact of noise on the surrounding environment.Its sleeping mode will have an impact on the indoor environment when it is installed in a sunken manner.The influence of three factors such as sinking and sinking on the cooling noise,this paper simulates the cooling tower according to the sound ray tracking method.The simulated noise results are similar to the field measured trend,and the decoration changes are similar,and the maximum estimate is 8%of the tower.In the research,the simulation method was used to determine the sound wave attenuation at the sound receiving point as the test target,and 16 different cooling tower fields were simulated.It is found that the height of the sound barrier outside the shadow area is significantly affected by the height of the sound barrier,and the height of the subsidence analysis in the shadow area is significantly affected.In addition,today,the formula for the attenuation of noise in the acoustic shadow area and outside the shadow area is summarized through linear regression of acoustic waves.The R^(2) values of the two reached 76%and 97.4%.