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正交球面波源边界点法及其在声全息中的应用 被引量:7

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摘要 在采用常规的边界点法求解声辐射问题时,所有传递矩阵的构造均需要对表面法向振速特解矩阵直接求逆,因而要求表面法向振速特解矩阵必须为满秩方阵,但常规边界点法中特解源的类型单一,相互之间不存在正交关系,且特解源的位置又只能由经验公式来确定,因而限制了其应用范围.鉴于此问题,首先对特解源的构造方法进行了改进,提出采用奇异值分解方法对所构造的表面法向振速特解矩阵求广义逆,从而解除了对特解源位置的约束.在此基础上,进而提出采用不同阶次的正交球面波源作为特解源的正交球面波源边界点法,此时只需满足使特解源的个数小于等于表面结点个数即可,该方法一方面继承了常规边界点法的所有优点,另一方面又从根本上彻底地解决了特解源位置的选取问题,并避免了那些对计算结果毫无影响而只是增加了计算量的特解源存在.首先对所提出方法进行理论推导,随后将其作为声场全息变换算法应用于声场的全息重建和预测中,并通过实验研究,验证了文中方法及其在声全息中应用的可行性和正确性.
出处 《科学通报》 EI CAS CSCD 北大核心 2004年第13期1322-1331,共10页 Chinese Science Bulletin
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共引文献49

同被引文献105

  • 1毕传兴,陈剑,陈心昭.半自由声场的全息重建和预测技术研究[J].声学学报,2004,29(4):379-384. 被引量:6
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