【摘要】 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。更多还原

【Abstract】 The sound transmission loss of a panel excited by high-frequency noise and a rib- bed panel (the skin of an aircraft, the wall plate) was studied using the statistical energy analy- sis method. It was found that under the effect of sound load in the high-frequency realm, the sound transmission loss of the ribbed panel is weaker than that of the excited panel The pres- ent paper explains this phenomenon which can be accounted for with mass law but using the energy balance equation of the ribbed panel.更多还原