基于声学黑洞的盒式结构全频带振动控制

doi:10.7527/S1000-6893.2019.23350

Abstract

Abstract: As a new type of efficient wave control technology, the Acoustic Black Hole (ABH) technology is widely used in vibration control of beam and plate structures. However, the traditional acoustic black hole structures have many shortcomings, such as weak local strength and stiffness, large feature size, and high effective frequency, limiting the further application and promotion of acoustical black hole technology. A new type of Acoustic Black Hole Damping (ABHD) absorber is designed for the vibration control of box-type structure. In this paper, the finite element simulation method is used to study the dynamic characteristics of the box-type structure with ABHD absorber. The results show that it has high energy concentration and dissipation ability. By optimizing the design of ABHD absorber at different positions in the middle of upper and lower main beams, the vibration reduction effect of the full-band can be achieved without changing the strength and stiffness of the main structure. The experimental results show that full-band resonance peaks of the box-type structure with ABHD absorbers can be reduced by 5-30 dB, and the weight of ABHD absorbers accounts for 7.87% of the total weight of system.

Key words: full-band, vibration control, box-type beam structure, ABH, dynamic vibration absorber

CLC Number:

V214.3⁺3

HE Pu, WANG Xiaodong, JI Hongli, QIU Jinhao, CHENG Li. Full-band vibration control of box-type structure with acoustic black hole[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(4): 223350-223350.

References 24

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Full-band vibration control of box-type structure with acoustic black hole

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