Equivalent Acoustic Transfer Vector Method for Analysis of Sound Field in Irregular Enclosure

Abstract

Abstract:

Equivalent acoustic transfer vector method for the analysis of sound field in irregular enclosure was developed. The sound field formed by the complex vibrating structure was replaced by the superposition of a series of virtual sources near the surface of the cavity, and the strength of those sources was obtained by matching the normal velocity on the surface. The connection between the normal velocity on the surface and the sound pressure at the interested point in the cavity was established, and the calculation formula of panel acoustic contribution was deduced. Compared with boundary element method, complicated numerical calculation and the singular integrals were avoided in the proposed method, and the calculation efficiency was improved. The simulation results show that the proposed method is correct and effective.

Key words: equivalent source method, acoustic transfer vector, irregular enclosure, panel acoustic contribution

摘要：

提出了一种用于封闭空腔内声场的计算方法——等效声传递向量法。采用位于腔体表面附近的若干虚构声源的叠加声场来等效由结构振动形成的封闭空腔声场，通过匹配振动结构表面上的法向振速获得虚构声源的源强，建立起结构表面的法向振速与腔体内场点声压的联系，并推导了结构面板声学贡献度的计算公式。计算过程避免了边界元法中复杂的数值计算和奇异积分的处理，提高了计算效率。仿真结果证明了该方法的正确性和有效性。

关键词: 等效源法, 声传递向量, 不规则封闭空腔, 面板声学贡献度

CLC Number:

TB535

Xiao Yue, Chen Jian, Jiang Fengxin. Equivalent Acoustic Transfer Vector Method for Analysis of Sound Field in Irregular Enclosure[J]. China Mechanical Engineering, 2014, 25(21): 2853-2859.

肖悦, 陈剑, 蒋丰鑫 . 封闭空腔内声场分析的等效声传递向量法[J]. 中国机械工程, 2014, 25(21): 2853-2859.

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