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A box-type vibration-damping structure based on the acoustic black hole effect

A vibration-damping structure and black hole effect technology, which is applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., can solve the problems of destroying the strength and stiffness of the main structure, affecting the function of the damped structure, and achieving high-efficiency energy Absorption and vibration damping effect, excellent vibration damping effect, good robustness effect

Active Publication Date: 2020-01-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The purpose of the present invention is to provide a box-type damping structure based on the acoustic black hole effect, which is used to solve the problem that the existing acoustic black hole technology destroys the strength and stiffness of the main structure and affects the function of the damped structure in order to achieve the purpose of vibration reduction question

Method used

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  • A box-type vibration-damping structure based on the acoustic black hole effect
  • A box-type vibration-damping structure based on the acoustic black hole effect
  • A box-type vibration-damping structure based on the acoustic black hole effect

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Embodiment 1

[0063] The effectiveness of the box-type vibration damping structure of the present invention is verified by means of simulation.

[0064] 1. Computational model

[0065] In order to ensure the accuracy of the calculation model, improve the calculation efficiency, and reduce the calculation time, three ABH vibration damping structures are evenly arranged in the middle of the upper main beam 2 and the lower main beam 3. The size of the upper main beam 2 and the lower main beam 3 is 300*20*3mm; the size of the front connecting member 1 and the rear connecting member 6 is 20*5*11mm; The distance between the surfaces is 11mm, the distance between the upper and lower surfaces of the first edge thickness maintaining area 4-1 and the second edge thickness maintaining area 4-2 are both 0.2mm, and the overall length of the ABH damping frame 4 is 80mm and the width is 20mm ; The size of the damping layer 5 pasted up and down the ABH damping member 4 is 20*20*1mm; except that the dampin...

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Abstract

The invention discloses a box-type vibration-damping structure based on the acoustic black hole effect. The box-type vibration-damping structure includes: an upper main beam and a lower main beam arranged in parallel and symmetrically, and the upper main beam and the lower main beam The two ends of the formed space are respectively provided with a first connecting member and a second connecting member, and at least one connecting member is arranged between the upper main beam and the lower main beam and is located between the first connecting member and the second connecting member. ABH damping components between the components, the surface of the ABH damping components is provided with a damping layer. The box-type vibration-damping structure provided by the present invention utilizes the acoustic black hole effect to concentrate the elastic wave energy on the main beam on the ABH vibration-damping component, and utilizes the damping layer attached to the ABH vibration-damping component to absorb and dissipate the vibration energy. It has technical advantages such as simple structure, good robustness, and excellent vibration damping effect, and has broad application prospects in vibration control of box structures and beam structures.

Description

technical field [0001] The invention belongs to the technical field of structural vibration reduction and noise reduction, in particular to a box type vibration reduction structure based on the acoustic black hole effect. Background technique [0002] With the development of aerospace vehicles and other engineering equipment in the direction of high-speed, large-scale, light-weight and extreme operating environments, the resulting vibration and noise problems are becoming more and more serious, which has become one of the important factors restricting the performance improvement of major equipment in our country. . As one of the important components of aerospace delivery equipment, the box structure is widely used in aircraft structures and civil engineering because of its light structural weight and excellent mechanical properties. As an important part of aircraft wings, building walls and floors, the box structure often needs to withstand complex load environments and vib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F7/00
CPCF16F7/00
Inventor 季宏丽裘进浩何璞王小东张超吴义鹏陶骢翀
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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