双层板结构隔声性能阻抗法分析

Impedance Analysis Method for Sound Insulation of Double Panels

摘要:

应用阻抗分析法与少量实样测试相结合的研究途径,探讨具有确定平面尺寸和边界条件的双层板结构的隔声量,进而得到相应的半理论半经验拟合公式.对3种不同夹层形式的双层板结构的倍频程隔声量进行实例分析,得到各自的拟合公式.3种夹层形式分别为吸声材料夹层、空气夹层(空腔)和空气吸声材料夹层.利用这些拟合公式,可以便捷、高效地开展隔声结构参量的工程筛选.

Abstract:

The sound insulation of double panels with a certain plane dimensions and boundary condition can be analyzed by a combinative way of impedance analysis method and a few measurements,and an expert formula can be obtained.Three kinds of sandwich material constructions were analyzed respectively.Its sound insulations and expert formulae were obtained in octave band.These three kinds of sandwich materials are absorbing sandwich,air sandwich,and air-absorbing sandwich.It will be convenient and high efficient to screen insulation construction parameters by these expert formulae in engineering design.