An acoustic finite element approach for studying boundary flexibility and sound transmission between irregular enclosures
An acoustic finite element approach for studying boundary flexibility and sound transmission between irregular enclosures
复制标题
用于研究不规则外壳之间的边界灵活性和声音传输的声学有限元方法
DOI：
10.1016/s0022-460x(73)80243-3
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发表时间：
1973
影响因子：
4.7
通讯作者：
A. Craggs
中科院分区：
文献类型：
--
作者：
A. Craggs
简单的声学有限元用于低频声传输问题。本文的第一部分涉及的情况下，（i）一个单一的外壳与灵活的边界，和（ii）两个外壳之间的结构耦合，允许直接和侧翼声音的控制方程的近似公式。考虑了柔性边界对简正模态和固有频率的影响。最后给出了汽车内声传播的数值例子。在这种情况下，计算完整耦合系统的简正模式和频率。这些可用于计算乘客空间对发动机罩内的加速度源或作用在边界上的力的压力响应。
Simple acoustic finite elements are used for problems in low frequency sound transmission. The first part of the paper deals with the approximate formulation for the governing equations for the cases of (i) a single enclosure with a flexible boundary, and (ii) structural coupling between two enclosures allowing for direct and flanking sound. The effects of flexible boundaries on the normal modes and natural frequencies is considered. A numerical example is given for the case of sound transmission in cars. In this instance the normal modes and frequencies for the complete coupled system are computed. These can be used for calculating the pressure response in the passenger spzce to either an acceleration source in the engine enclosure or a force acting on the boundaries.