快速边界元方法模拟匀速运动声源声场的研究  

Simulation of acoustic field of sound source moving with constant speed by fast BEM

作　　者：周强[1] 李传珍[1] 闫再友[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《浙江科技学院学报》2016年第1期19-23,共5页Journal of Zhejiang University of Science and Technology

基　　金：国家自然科学基金项目(11172132);江苏高校优势学科建设工程资助项目(苏政办发[2011]6号)

摘　　要：用预修正快速傅里叶变换边界元方法计算亚声速匀速运动声源声场。先将亚声速匀速流动时声场的控制方程,通过普朗特-葛劳渥变换到无流动时声场的控制方程,再利用预修正快速傅里叶变换边界元方法,模拟已知变换域结构表面振动速度的结构声辐射问题。数值解和解析解的对比证明了本研究提出的快速边界元方法之算法和程序的正确性。Simulation of acoustic radiation problems in a subsonic uniform stream using the precorrected fast Fourier transformation（FFT）boundary element method（pFFT-BEM）is investigated.The governing equation for acoustic radiation in a subsonic uniform flow is transformed into the corresponding governing equation in the classical acoustic problems by the Prandtl-Glauert transformation.Then the acoustic radiation problem in a subsonic uniform stream is simulated by using the pFFT-BEM.Comparison of the numerical results with the corresponding analytical solutions show the correctness and accuracy of the proposed method.

关 键 词：预修正快速傅里叶变换 边界元法 普朗特-葛劳渥变换 声场 

分 类 号：O422.2[理学—声学] O242.1[理学—物理]