居民窗纱隔声和通风性能数值模拟及优化研究  

Numerical Simulation and Optimization of the Sound Insulation and Ventilation Performances of CivilWindow Screens

作　　者：刘济洲 李明 LIU Jizhou;LI Ming(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China;School of Transportation Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学热能工程学院,济南250101 [2]山东建筑大学交通工程学院,济南250101

出　　处：《噪声与振动控制》2023年第3期188-194,共7页Noise and Vibration Control

基　　金：山东建筑大学博士科研基金资助项目(X21107Z,X21108Z)。

摘　　要：为了减少城市交通噪声对临街建筑内居民影响,从改进和优化窗纱结构的角度,探究利用窗纱降低交通噪声对室内声舒适性影响的可能性和效果。利用COMSOL软件的压力声学求解器和计算流体力学求解器,首先通过模拟得到面积填充比率对普通方孔窗纱隔声和通风性能的影响规律。在此基础之上,提出圆孔窗纱结构,并对比其与方孔窗纱在隔声和通风性能上的差异。通过对比发现,圆孔窗纱结构所具有的类似圆管声波导的结构,可以明显提高其对声波的消减效果,扩大消声频率范围。且圆孔构型可以减小流动摩擦阻力面积,使得圆孔窗纱在面积填充比率小于75%时较普通方孔窗纱具有更好的隔声性能和通风效果。In order to reduce the impact of urban traffic noise on residents living in buildings nearby streets,a method of utilizing window screens to reduce the influence of traffic noise on indoor acoustic comfort is proposed.The structure of window screens is improved and optimized.The applicability and feasibility of this method are discussed.Using the Pressure Acoustic Module and the Computational Fluid Dynamics solver of COMSOL Multiphysics software,the sound insulation and ventilation performances of the normal square-hole window screen are simulated for different screen area filling rates.On this basis,a round-hole window screen structure is proposed and its sound insulation and ventilation performances are simulated and compared with those of the square-hole window screen.The comparison shows that the round-hole window screen performs better than the square-hole window screen in reducing sound amplitude and energy because of its tubular sound waveguide structure.Due to the fact that the round-hole configuration minimizes the surface area of flow frictional force,the round-hole window screen has better ventilation performance than the square-hole window screen for the same screen area filling rate lower than 75%.

关 键 词：声学 交通噪声 隔声窗纱 通风性能 数值模拟 

分 类 号：TU112.592[建筑科学—建筑理论]