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阻性消声器声学性能预测的快速多极子边界元法

DOI: doi:10.3969/j.issn.1006-7043.2011.04.006

Keywords: 子结构快速多极子边界元法, 多区域声场, 吸声材料, 阻性消声器, 传递损失??

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Abstract:

为解决大尺度声场中常见的多区域复合及多吸声材料复合问题,提出了一种子结构快速多极子边界元法.鉴于未知量列向量的构建次序及边界节点编号顺序对迭代收敛速度有重要影响,提出了整体矩阵方程的构建原则.此外,针对复数形式声参数对多极子展开式计算准确性的影响,对快速多极子边界元法进行了研究与修正.以膨胀腔阻性消声器为例,应用子结构快速多极子边界元法与传统边界元法计算其传递损失.结果表明,该方法与修正是有效的,而且在某给定频率下,随着边界未知节点数的增大,其相对于传统边界元法在计算效率方面的优势越来越明显.

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