摘要
为研究消声结构参数对消声性能的影响,建立了消声器声场有限元模型,并在模型边界上施加相应的边界条件,通过计算求得不同结构参数下消声器的传递损失,以分析不同的结构参数对消声器的消声性能的影响。计算发现采用内径20 mm的微穿孔管可有效降低3～6 kHz频段内的噪声,微穿孔管的单节管长应为1/4波长的9倍,管上孔洞按正方形分布,开孔直径0.4 mm,开孔率4.8%。
We construct the finite element model of the sound field of a muffler, impose the corresponding boundary conditions on the boundary of the model, and calculate the transmission loss of different structure parameters to investigate the impacts of different structure parameters on the performance of a muffler. Computational results show that the microperforated pipe of 20 mm can suppress the noise of 3 - 6 kHz. The length of single tube is nine times of quarter-wavelength and the entire tube has three-stage structure. The holes on the tube are square with diameter of 0.4 mm and opening rate of 4.8%.
出处
《山东科学》
CAS
2012年第6期42-46,共5页
Shandong Science
基金
国家自然科学青年基金(51206101)
山东省自然科学基金(ZR2012EEQ012)
关键词
消声器
有限元
微穿孔板
传递损失
muffler
finite element method
microperforated panel
transmission loss
