基于有限元法对不同厚度混凝土墙的隔声量分析

Sound Insulation Analysis of Concrete Wall Based on Finite Element Method

以结构厚度为基本参量,分析其对隔声量的影响.利用有限元法对不同厚度的混凝土墙的隔声量进行计算分析,得到结构厚度对单层墙隔声量的影响规律.研究结果表明:不同厚度结构的透射声压随着距离的增加逐渐减弱.低频段,厚度与透射声压之间成反比关系;中高频段,透射声压增大,场点上的声压值随频率的变化呈现出复杂性.与高频段相比,低频段隔声量变化相对平缓.

Acoustic finite element method is used to analyze the influence of thickness of the concrete wall on sound insulation. It is found that the transmission sound pressure with different thickness is gradually weak with the increasing of the structure thickness. In the low frequency band, the transmission sound pressure has an inverse relation to the thickness while in the middle and high frequency band, when the transmission sound pressure increases,the sound pressure of field point changing with frequency becomes complicated. Compared with the high frequency band, the change of sound insulation in the low frequency band becomes smooth.