摘要
文章采用实验和数值仿真的方法,对影响微穿孔板吸声结构声学性能的设计参数,包括板厚,开孔孔径,开孔率等进行深入细致的研究。其中实验内容主要在驻波管以及一个管道型的测试平台上进行,驻波管相关的研究内容用于佐证管道实验的准确性;数值仿真采取一种求极值点的算法,利用这一算法可以绕开对经典方程的求解,而直接确定微孔的声共振点,也即最大噪声吸收位置,通过共振点附近两条曲线的叠加确定吸声带宽的变化规律。实验和仿真结果的变化趋势一致。
Methods of experimental and numerical simulation were used to study the effects of the design parameters, such as thickness, aperture and perforation rate, on the acoustic performance of the absorbers with the micro-perforated panels. The experiment contents were mainly processed on a stationary-wave tube and a pipe-type test platform. The experiment contents relevant to the stationary wave tube were used to prove the correctness of the experiments. An algorithm for finding extreme points was taken in numerical simulation. Using this algorithm could help to directly determine the resonance points, i.e. the maximum noise absorption positions in the pores without solving the classical equations. On the other hand, the variation of sound absorption bandwidth could be determined by superimposing the two curves near the resonance points. The variation trends of the experimental and simulation results were consistent.
出处
《噪声与振动控制》
CSCD
2016年第1期200-203,共4页
Noise and Vibration Control
关键词
声学
噪声
微穿孔板
风洞
acoustics
noise
micro-perforated panel
wind tunnel
