利用大型通用程序求解声学问题

Analysis of acoustic problems using general purpose programs

本文介绍了利用有限元通用程序求解声学问题的声学——固体力学比拟法。该方法允许使用固体单元来模拟声介质。结合二维声空腔的模态分析和排气消声单元的传递损失计算说明了该方法的应用。给出了边界条件的处理方法及声粒子速度的计算公式。

Acoustics-Mechanical Analogy method solving acoustic problems by using general purpose programs is introduced in this paper. This method allows to model acoustic medium by using solid elements. Applications of this method is illustrated through modal analysis of a 2-D acoustis cavity and transmission loss of an exhaust muffler element. The handle of boundary conditions and the formulation of acoustic particle velocity are given.