机电工程技术2024，Vol.53Issue(2)：124-127,216,5.DOI:10.3969/j.issn.1009-9492.2024.02.027
基于一维声学黑洞理论的方形管减振降噪方法研究
Research on Vibration and Noise Reduction Method of Square Tube Based on One-dimensional Acoustic Back Hole Theory
摘要
Abstract
Based on the principle of not changing the basic structure of the components,vibration and noise by adding acoustic black hole structure to square tubes are reduced,which is widely used in engineering.Based on the acoustic black hole theory,it is proved that sound waves can produce non-reflection phenomena in the variable cross-section structure with a power function that tends to infinity.At this stage,there is no infinitely extended structure,and the tip of the power-law surface end of the acoustic black hole structure will be truncated,so that the non-standard one-dimensional acoustic black hole expansion structure is obtained.The optimal parameters suitable for the non-standard one-dimensional acoustic black hole on the square tube are selected through simulation,and the non-standard one-dimensional acoustic black hole structure is fabricated by using 3D printing,which is added to the end of the square tube by lamination for simulation and experiment.The vibration amplitude of the square tube is used as the evaluation criterion to evaluate the vibration and noise reduction effect of the square tube after the addition of acoustic black hole.The experimental results show that by using the acoustic black hole structure,the vibration and noise reduction effect in the X,Yand Zdirection can be achieved 9.43,9.5 and 8.62 dB.关键词
声学黑洞/无反射现象/尖端截断/减振降噪Key words
acoustic black hole/no reflection/tip truncation/vibration and noise reduction分类
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慈长凯,时松青..基于一维声学黑洞理论的方形管减振降噪方法研究[J].机电工程技术,2024,53(2):124-127,216,5.
