应用结构声强技术测量耦合损耗因子

Measuring Coupling Loss Factors by Structural Acoustic Intensity Technique

介绍了一种新的耦合损耗因子测量方法：声强法。以点和线耦合结构为例，应用两点差分技术和单点技术测量弯曲波耦合损耗因子，将测量结果与传统方法获得的测量结果相比较：声强法能较准确地测量点耦合结构间弯曲波耦合损耗因子，其测量精度与能级差分法和直接测量方法的测量精度相似。

Coupling loss factor is a unique parameter for characterizing the power flow between coupled structures in Statistical Energy Analysis (SEA).It is needed to predict or measure coupling loss factors in Statistical Energy Analysis.There are several methods for measuring coupling loss factor.In this paper,a new method (intensity method)is presented.The coupling loss factors between structures coupled through a point or along a line were measured using the single point technique and the two accelerometer array technique were compared with those measured using conventional methods.