Flaky acoustic black hole energy harvester set device

Abstract

The invention provides a flaky acoustic black hole energy harvester set device which comprises a plurality of acoustic black hole energy harvesters and an energy harvester set lower bottom face sealing plate. The multiple acoustic black hole energy harvesters are sequentially connected in an attached mode and fastened with the energy harvester set lower bottom face sealing plate. The flaky acoustic black hole energy harvester set device has lots of adjustable parameters, has the good vibration reduction effect and is suitable for solving the problem of low-frequency vibration, the covering frequency range is wide, and the defects of low structural strength and weak bearing performance of traditional acoustic back holes are overcome. In vibration reduction application, the multiple energy harvester set devices can be arranged in a flat laid mode, and the acoustic black hole energy harvesters with the different structural sizes and parameters can be combined at will; the functions of devouring and capturing of vibration of the designated frequency band are conducted on the basis of not destroying the structural integrity and not reducing the structural strength and safety; designingcontrol over low-frequency vibration, medium-frequency vibration and high-frequency vibration can be achieved through the flaky acoustic black hole energy harvester set device; and the acoustic blackhole energy harvesters are small in additional mass, the implementing method is simple and flexible, and the acoustic black hole energy harvesters can be combined at will to adjust the energy absorption efficiency.

Description

technical field [0001] The invention relates to a vibration and noise control and vibration reduction and noise reduction device, in particular to a vibration and noise reduction device based on the acoustic black hole effect and the principle of local resonance. Background technique [0002] Structural acoustic black hole effect (ABH Effect) refers to the phenomenon that when the thickness of the beam and plate shell gradually decays to zero, the bending wave inside the structure decays with the thickness, the wave number increases to infinity, and the wave velocity gradually slows down to zero. [0003] A typical one-dimensional acoustic black hole (Acoustic Black Hole, ABH) follows the power function h(x)=εx for the section thickness m Attenuated wedge structure. Where h(x) is the thickness of the acoustic black hole structure at x, ε is a constant, and the power exponent m is a positive rational number. Mironov proved that when the thickness change of the structure sat...

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Problems solved by technology

[0026] In view of the defects existing in the above-mentioned prior art, the object of the present invention is to provide an acoustic black hole energy harvester group device, which utilizes the structural acoustic black hole effect and the principle of local resonance to gather structural vibration bending waves and reduce the geometrical margin of the acoustic black hole coverage. Structural vibration and noise, solving the problems of the current vibration and noise control devices with few adjustment parameters, large volume and mass, and poor low-frequency vibration damping performance

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