Experimental Study on Vibration and Noise Reduction Performance of a Moving Vehicle Using Spiral Acoustic Black Holes
摘要
Acoustic black hole (ABH), as an emerging technology, has demonstrated exceptional performance in vibration and noise reduction due to its unprecedented wave manipulation characteristics, enabling broadband wave energy concentration and enhanced damping effects in lightweight structures. However, current research on ABH remains largely confined to theoretical studies, numerical simulations, and laboratory tests on prototype samples, with very limited investigations focusing on its practical application in real-world equipment for vibration and noise reduction. In this study, a spiral ABH structure was designed and fabricated, and it was applied as a dynamic vibration absorber (DVA) to mitigate vibration and noise in a moving vehicle. The vibration and noise reduction performance of the ABH-DVA on actual equipment was measured. By comparing the vibration velocity levels of the engine and the sound pressure levels inside the cabin with and without the ABH-DVA, the results demonstrate that the proposed spiral ABH-DVA can effectively suppress vibration and noise in moving vehicles. Thus, this work demonstrates the potential of ABH structures for practical applications in real-world equipment.