基于统计能量法的单双层玻璃窗隔声量分析

摘要

The relevant parameters, kinetic equations and power balance equations for statistical energy analysis (SEA) are provided. The sound insulation models of single and double layer glazing windows with the same thickness are built for sound insulation performance analysis with the SEA method. The results show that within the frequency range of 125 Hz~4 000 Hz, the differences of sound transmission loss between the prediction and the measurement data of the two glazing windows are within 3 dB and 7 dB respectively (except at the critical frequency). The analysis also shows that the sound transmission loss of the double-layer glazing window with sound absorption treatment at its frames is 13 dB higher than that of the single-layer glazing window. In the range of 500 Hz ~ 4 000 Hz, the sound insulation of the double-layer glazing window can be increased by 1 dB as the thickness of the air layer in the window is increased by 50 mm.%根据统计能量法（SEA）的基本原理，给出相关参数、运动方程以及功率平衡方程的表达式。进而在等厚度的单、双层玻璃窗隔声模型中，采用SEA对其隔声性能进行分析。结果表明：在125 Hz～4000 Hz频率范围内，单、双层玻璃窗模型的预报隔声量与实测数据的误差分别在3 dB和7 dB以内（临界频率除外），边框有吸声处理的双层玻璃窗较单层玻璃窗的平均隔声量高13 dB左右；在500 Hz～4000 Hz范围内，空气层的厚度每增加50 mm，双层玻璃的隔声量相应提高1 dB。