Analysis of acoustic radiation mode in time domain  

作　　者：WU WeiGuo Faculty of Science, Jiangsu University, Zhenjiang 212013, China 

出　　处：《Science China(Technological Sciences)》2009年第8期2384-2390,共7页中国科学（技术科学英文版）

基　　金：Supported by the Senior Qualified Personnel Research Foundation of Jiangsu University (Grant No. 07JDG070);the Social Development Foundation of Zhenjiang (Grant No. SH2008015)

摘　　要：The acoustic radiation mode of plane, whose radiating operator is constructed by Rayleigh integral, is investigated in the time domain and its physical meaning is given. The relationship between the acoustic radiation modes of time domain and frequency domain is discussed. It is verified that the acoustic radiation modes are the natural property of the radiator and they can be obtained by different methods. These time domain radiation modes, whose shapes are only dependent on the geometry size and shape of the radiator, can radiate sound power independently. Especially, the first time domain radiation mode accounts for most of the sound radiation. All these simplify the calculation and control of the structure-borne sound power. Based on these observations, the sound power radiated from the vibrating plate is estimated by the time domain radiation mode for verifying the proposed method. The influence factors on the estimating accuracy in different conditions are discussed.The acoustic radiation mode of plane, whose radiating operator is constructed by Rayleigh integral, is investigated in the time domain and its physical meaning is given. The relationship between the acoustic radiation modes of time domain and frequency domain is discussed. It is verified that the acoustic radiation modes are the natural property of the radiator and they can be obtained by different methods. These time domain radiation modes, whose shapes are only dependent on the geometry size and shape of the radiator, can radiate sound power independently. Especially, the first time domain radiation mode accounts for most of the sound radiation. All these simplify the calculation and control of the structure-borne sound power. Based on these observations, the sound power radiated from the vibrating plate is estimated by the time domain radiation mode for verifying the proposed method. The influence factors on the estimating accuracy in different conditions are discussed.

关 键 词：ACOUSTIC RADIATION TIME-DOMAIN RADIATION MODE SOUND POWER 

分 类 号：O422.6[理学—声学]