声学黑洞梁结构振动特性研究

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中图分类号：TB53；P751 文献标识码：A文章编号：1673-9868（2025）07-0196-11

Abstract： Acoustic black hole structure is a lightweight and eficient passive vibration and noise reduction solution. Based on the improved Fourier series and the analytical Rayleigh-Ritz method，a vibration analysis model for acoustic black hole beam structure under arbitrary boundary conditions was established. On this basis，the modal analysis and dynamic response analysis were carried out to study the modal loss factors and vibration energy of the acoustic black hole beam structure. The results show that compared with the uniform beam，the acoustic black hole beam has a denser modal frequency，and the modal damping loss factor increases by nearly five times.The vibration energy in the acoustic black hole region exceeds （204号 120dB ， showing a strong aggregation and disipation effect on energy，which can provide reference for the passive vibration reduction design of engineering structures.

Key words： acoustic black hole; beam structure; improved Fourier series; energy method

近年来，声学黑洞结构（Acoustic BlackHole，ABH）作为一种新型轻质高效的被动减振降噪技术，受到人们越来越多的关注[1-4]。（剩余10974字）