单层变腔深微穿孔板吸声体的一种理论近似算法

A Kind of Approximate Arithmetic for Micro-perforated Panel Absorber with Variational Cavity

基于马大猷教授提出的"微穿孔板吸声体精确理论",针对带变厚度空腔的微穿孔板吸声体,提出了一种理论近似算法。通过MATLAB程序分别对3种不同参数的三棱柱吸声体试件进行了计算,并应用驻波管实验对计算结果进行了验证。实验结果表明,计算结果与实验结果基本吻合,两者之间的误差很小,故这种计算方法是可行的。

Based on the accurate theory of the micro-perforated panel absorber, this paper presents one kind of approximate arithmetic for micro-perforated absorber with variational cavity. Three kinds of triangular prism absorbers with different parameters have been calculated through MATLAB programs. And for validating the calculational results, stationary wave tube testing system was applied to measure the absorption coefficients. It revealed that the calculational results are in excellent agreement with the experiment results. The difference between two kinds of results is little. So this kind of approximate arithmetic is feasible.