阻尼复合板的结构参数配置与传声损失

Dependence of Sound Transmission Loss Characteristics of Elastic-viscoelastic Layered Damping Panel on Its Structural Parameters

本文根据无限大弹性体和粘弹性体的波传递理论，给出了适合于任意层弹性－粘弹性阻尼复合板传声损失计算的传递矩阵法；应用传递矩阵法对不同结构特征的阻尼复合板传声损失（ＴＬ）进行了变参数数值计算，系统地分析了分层材料的参数配置对隔声吻合频率及吻合频率处传声损失的影响规律，得到了与阻尼复合板隔声设计有关的重要结论．

In this paper, the Transfer Matrix Method (TMM) has been developed for sound transmission loss(TL) calculation of elastic-viscoelastic layered damping panel (EVLDP) based on an analytical model ofwave-travelling in an infinite elastic and viscoedlastic extend. The sound TL calculation of EVLDP withdifferent configurations and varying parameters has been carried out using the TMM. According to the calculated results, the dependence of the acoustic coincidence frequencies and TL values in coincidence zoneon the geometric and physical parameter arrangement has been analysized, and some meaningful remarksachieved for the sound insulation design of EVLDP.