半自由声场和混响声场等效转换方法研究  

Research on the equivalent conversion method for semi-free field and reverberant field

作　　者：任方[1] 冯秉初[1] 鲁勇[1] 

机构地区：[1]北京强度环境研究所可靠性与环境工程技术重点实验室,北京100076

出　　处：《强度与环境》2012年第2期20-26,共7页Structure & Environment Engineering

基　　金：国家重大基础研究项目

摘　　要：从结构振动场和声场之间的关系出发,计算声激励下的结构响应;通过分析混响声场和半自由声场的基本特性,用试验法获得了声激励下结构模态和不同声场的空间相关系数,利用广义载荷响应等效理论,给出了典型结构在不同声场转换关系下的等效转换关系。Based on the connection between structural vibration field and sound field, the structural response under acoustic excitation was calculated. With analyzing the basic properties of reverberant field and semi-free field, the structural modal and the spatial correlation coefficient of different sound fields was obtained by experiment. Accordingly, by means of the equivalent theory of generalized load, equivalent conversion relation is presented for typical structure in different sound fields

关 键 词：混响声场 半自由声场 空间相关系数 等效转换 

分 类 号：V416.2[航空宇航科学与技术—航空宇航推进理论与工程]