摘要
基于波叠加法的近场声全息技术因其在适应性和数值计算上的优势,近年来已经被广泛应用于声源识别、定位和声场分析.在基于波叠加法的近场声全息技术中,以射线波函数为波叠加法的积分核函数可有效改善系统矩阵的病态性,提高声场计算的数值稳定性.但由于射线波函数在低波数处的指向性过强,声场信息主要集中在射线波函数的主指向处,导致了其他方位的声场信息缺失.针对以上问题,提出了一种射线波函数信息的补偿方法,即在射线波函数中加入一定比例的单极子球波函数对重建声场进行信息补偿.数值算例结果表明:补偿信息后的射线波函数不仅保证了声场重建过程中数值计算的稳定性,而且弥补了单一射线波函数在低波数处的缺陷,进一步提高了声场的重建精度.
Near field acoustic holography based on wave superposition has been widely used in sound source identification,location and field analysis in recent years because of its advantages in adaptability and numerical calculation.In the near-field acoustic holography technology based on the wave superposition method,the ray wave function as the integral kernel function of the wave superposition method can effectively improve the ill-conditionedness of the system matrix and improve the numerical stability of the sound field calculation.However,due to the strong directivity of the ray wave function at low wave numbers,the sound field information is mainly concentrated at the main direction of the ray wave function,resulting in the lack of sound field information in other directions.To solve the above problems,a ray wave function information compensation method is proposed,that is,a certain proportion of monopole spherical wave function is added to the ray wave function to compensate the reconstructed sound field.Numerical example results show that the ray wave function after supplementary information not only guarantees the stability of the numerical calculation in the sound field reconstruction process,but also makes up for the defect of a single ray wave function at low wavenumbers,and further improves the accuracy of sound field reconstruction.
作者
陈岩豪
向宇
石梓玉
CHEN Yanhao;XIANG Yu;SHI Ziyu(School of Mechanical and Traffic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China;Guangxi Key Laboratory of Automobile Component and Vehicle Technology(Guangxi University of Science and Technology),Liuzhou 545006,China)
出处
《广西科技大学学报》
2021年第3期6-12,共7页
Journal of Guangxi University of Science and Technology
基金
国家自然科学基金项目(51775121)
广西研究生教育创新计划项目(YCSW2021314)资助.
关键词
近场声全息
波叠加法
射线波函数
信息补偿
声场重建
near-fieldacousticholography
wave superpositionmethod
ray wavefunction
information compensation
sound fieldreconstruction.
