| 穿孔管阻性消声器声学特性的有限元分析 |
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| 引用本文： | 徐贝贝,季振林.穿孔管阻性消声器声学特性的有限元分析[J].振动与冲击,2010,29(3):58-62. |
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| 作者姓名： | 徐贝贝 季振林 |
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| 作者单位： | （哈尔滨工程大学 动力与能源工程学院，哈尔滨 150001） |
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| 摘 要： | 将有限元法应用于预测穿孔管阻性消声器的声学性能。直通穿孔管阻性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,表明了有限元法预测穿孔管阻性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吸声材料的填充密度(流阻率)、吸声材料的厚度和穿孔率对穿孔管阻性消声器声学性能的影响,结果表明,增加吸声材料的填充密度,可以改善中高频消声性能,并使峰值频率向低频方向移动;增加吸声材料厚度,可以改善阻性消声器的中高频消声性能,而对低频声学性能影响较小;膨胀腔包覆吸声材料可以改善中高频消声效果,同时消除通过频率;增加穿孔率,可以提高穿孔管阻性消声器的高频消声性能,并使共振峰向高频方向偏移;吸声材料背后增加空气腔,可以在较宽的频率范围内获得较为平坦的消声曲线。
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| 关 键 词： | 消声器 穿孔管 吸声材料 有限元法 消声性能 |
| 收稿时间： | 2008-11-28 |
| 修稿时间： | 2009-5-31 |
Finite element analysis of acoustic attenuation performance of perforated tube dissipative silencers |
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| XU Bei-bei,JI Zhen-lin.Finite element analysis of acoustic attenuation performance of perforated tube dissipative silencers[J].Journal of Vibration and Shock,2010,29(3):58-62. |
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| Authors: | XU Bei-bei JI Zhen-lin |
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| Affiliation: | (College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China) |
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| Abstract: | Three-dimensional finite element method was developed to predict the acoustic attenuation performance of perforated tube dissipative silencers.Comparisons of transmission loss predictions with experimental results for straight through perforated tube silencers illustrate that the finite element method can predict the acoustic attenuation characteristics accurately.The finite element method was then used to investigate the effects of filling density (or flow-resistivity) and thickness of sound-absorbing mate... |
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| Keywords: | silencer perforated tube sound-absorbing material finite element method acoustic attenuation performance |
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