一种提高声场重构稳定性的射线等效源法A ray equivalent source method for improving the stability of acoustic field reconstruction
石梓玉;向宇;陆静;张阳;
摘要(Abstract):
基于传统等效源法的近场声全息中通常使用单极子或偶极子作为等效源进行声场重构计算,但由于这两种等效源只能辐射无指向性或弱指向性声波场,因此容易导致系统矩阵病态,严重影响声场重构结果的稳定性.本文提出了一种可以改善近场声全息中系统矩阵病态性的新思路,即采用可辐射强指向性声场的等效源替换传统等效源以使得系统矩阵呈现主对角占优的良态形式,从而降低其条件数,提高重构稳定性.文中利用偶极子构造了一系列可辐射较强指向性声场的等效源——射线等效源,并采用平面全息面对其进行了重构仿真.计算结果表明:用射线等效源替换传统等效源后不仅可以正确计算平面声全息问题,且降低了系统矩阵条件数,提高了重构精度.
关键词(KeyWords): 等效源法;声全息;声场重构;射线等效源
基金项目(Foundation): 国家自然科学基金项目(51775121;51665006)资助
作者(Author): 石梓玉;向宇;陆静;张阳;
Email:
DOI: 10.16375/j.cnki.cn45-1395/t.2019.03.001
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