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。
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.
关键词
统计能量分析
隔声量
加筋板
statistical energy analysis
sound transmission loss
ribbed panel
radiation resistance
mechanical damping coefficient
