›› 2010, Vol. 30 ›› Issue (4): 100-103.DOI: 10.3969/j.issn.1006-1355.2010.04.027
• 减振降噪设备和器材 • Previous Articles Next Articles
XU Bei-bei,JI Zhen-lin,KANG Zhong-xu,XU Hang-shou
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徐贝贝,季振林,康钟绪,徐航手
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Abstract: The finite element method (FEM) is applied to predict acoustic attenuation characteristics of straightthrough perforated tube silencer with steady air flow. The finite element formulation is carried out, and the numerical method and procedure for predicting the acoustic attenuation characteristics are introduced. Since the convective effect is taken into consideration, the present method is suitable for the case with steady air flow. Transmission loss of straightthrough perforated tube silencer is then predicted using threedimensional finite element method. The numerical results show that the acoustic attenuation effect is raised in the medium and higher frequency range as the Mach number of the flow is increased. It is suggested that in order to predict the acoustic attenuation characteristics of straightthrough perforated tube silencer accurately, the influence of steady flow on the sound propagation in the silencer should be considered.
Key words: acoustics, perforated tube silencer, acoustic attenuation characteristics, finite element method, steady air flow
摘要: 将有限元法应用于预测有均匀流存在时直通穿孔管消声器的声学特性,推导了考虑运流效应的有限元法计算公式,并给出了声学特性的计算方法和数值实施过程。传递损失数值计算结果表明,随着气流马赫数的增加,消声器中高频的消声量有所增加。为精确预测直通穿孔管消声器的声学特性,流速对消声器内声传播的影响应加以考虑。
关键词: 声学, 穿孔管消声器, 声学特性, 有限元法, 平均流
CLC Number:
TK413.4
XU Bei-bei;JI Zhen-lin;KANG Zhong-xu;XU Hang-shou. 《Finite Element Method for Prediction of Acoustic Attenuation Characteristics of StraightThrough Perforated Tube Silencer with Steady Air Flow》[J]. , 2010, 30(4): 100-103.
徐贝贝;季振林;康钟绪;徐航手. 《均匀流直通穿孔管消声器声学特性预测的有限元法》[J]. , 2010, 30(4): 100-103.
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URL: https://nvc.sjtu.edu.cn/EN/10.3969/j.issn.1006-1355.2010.04.027
https://nvc.sjtu.edu.cn/EN/Y2010/V30/I4/100