摘要
在比较现有二维矩形声腔的声源计算模型特点的基础上,提出了一种新的正方形线声源计算模型,用于计算基于模态级数叠加法的压力响应函数.分析表明,此模型不仅可以克服点声源模型的奇异性,而且在合理选择模型的几何尺寸的前提下能得到比面源模型更为均匀的压力分布,提高了传递函数计算的准确率.数值试验考察了此模型的实际应用效果,表明新的线声源数学模型较圆形线声源更为简便,可以提高计算效率.
A comparison of the existing sound source model for calculating transfer matrix of two-dimensional rectangular acoustic cavity is performed in this paper. Based on the comparison, a new square linar sound source model is developed to calculate the pressure response function. Results show that this new source model can not only overcome the singularity problem of the point source model but also get more uniform pressure distribution than that of the surface source model provided that the size of the new model＇s geometry is reasonably controlled. On the other hand, the mathematical model of the new square line-source is simpler than that of the circular line-source model. Therefore, it can improve the computational efficiency significantly. Finally, the feasibility of the new source model is substantiated by performing some numerical experiments.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第8期5484-5490,共7页
Acta Physica Sinica
基金
香港理工大学与内地
台湾
澳门高校联合培养博士生基金(批准号:A-PB0Q)
西安交通大学"211"工程三期项目资助的课题~~
关键词
传递矩阵
正方形线声源模型
二维声腔
模态级数叠加法
transfer matrix, square line-sound source model, two-dimensional acoustic cavity, modal series superposition
