聲學(xué)黑洞梁結(jié)構(gòu)振動(dòng)特性研究

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中圖分類號(hào)：TB53；P751 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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號(hào) 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

近年來，聲學(xué)黑洞結(jié)構(gòu)（Acoustic BlackHole，ABH）作為一種新型輕質(zhì)高效的被動(dòng)減振降噪技術(shù)，受到人們越來越多的關(guān)注[1-4]。（剩余10974字）