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本文对广泛用于工程结构的板和加筋板的隔声量进行了研究。通过对同样声载作用、不同频段的板和加筋板隔声量的实测值和计算值的比较,发现加筋板的隔声量在低频域比板的大,在高频域则相反。本文用统计能量分析的方法,从板和加筋板的能量平衡方程式出发,解释了这一用质量定律不能解释的现象。
In this paper, the sound insulation of panels and stiffened panels widely used in engineering structures are studied. The comparison between the measured values and the calculated values of sound insulation of slabs and stiffened panels with the same acoustic loading and different frequency bands shows that the sound insulation of the stiffened panels is larger than that of the slabs in the low frequency domain and opposite in the high frequency domain. In this paper, the method of statistical energy analysis, starting from the energy balance equation of plate and stiffened plate, explains the phenomenon that can not be explained by the law of mass.