摘要
三维有限元法被发展用于预测和分析穿孔管消声器的声学性能。直通穿孔管消声器和三通穿孔管消声器传递损失的有限元计算结果与实验测量结果吻合良好,表明了三维有限元法预测穿孔管消声器声学性能的适用性和精度。进而有限元法被用于研究几何结构对三通穿孔管消声器声学性能的影响,结果表明,中间管插入端腔会使共振频率向低频偏移,在三通穿孔管消声器的右侧增加端部共振器能获得良好低频消声效果。
Three-dimensional finite element method was developed to predict and analyze the acoustic attenuation characteristics of perforated tube silencers. Comparisons of transmission loss predictions with experimental results for straight-through perforated tube silencers and three-pass perforated tube silencers illustrated that the finite element method could predict acoustic attenuation characteristics of perforated tube silencers accurately. The finite element method was then used to investigate the effects of geometrical parameters on the transmission loss of three-pass perforated tube silencers. The duct extensions into the chambers led to lower resonant frequencies. To improve the low frequency acoustic attenuation of a typical three-pass perforated tube silencer,an end-resonator might be added on the right side of the three-pass perforated tube silencer.
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第9期112-115,217,共4页
Journal of Vibration and Shock
关键词
噪声控制
消声器
穿孔管
有限元法
消声性能
noise control
silencer
perforated tube
finite element method
acoustic attenuation performance
