Adaptive order tracking vibration reduction metamaterial shaft structure

A technology of order tracking and metamaterials, applied in the direction of rotation vibration suppression, vibration suppression adjustment, spring/shock absorber, etc., can solve problems such as inability to change, achieve good vibration and noise reduction effects, good dynamic balance, and applicable wide range of effects

Active Publication Date: 2021-12-31
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the fixed-frequency torsional vibration damper is widely used in the domestic market, that is, the frequency of the t

Method used

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  • Adaptive order tracking vibration reduction metamaterial shaft structure
  • Adaptive order tracking vibration reduction metamaterial shaft structure
  • Adaptive order tracking vibration reduction metamaterial shaft structure

Examples

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0028] Such as Figure 1 to Figure 6 As shown, an adaptive order tracking vibration damping metamaterial shaft structure provided by the present invention includes a shaft base 1, a housing 2 and a unit cell unit, and the unit cell unit includes a constant stiffness spring 3, a mass block 4 and a variable stiffness spring 5. Mass blocks 4 are respectively connected to shaft base 1 and housing 2 through constant stiffness springs 3 , and adjacent mass blocks 4 are connected through variable stiffness springs 5 ​​.

[0029] In this embodiment, there are eight mass blocks 4 and they are annularly distributed around the shaft base 1 , the number of constant stiffness springs 3 is sixteen, and the number of variable stiffness springs 5 ​​is eight. During actual use, the number of mass blocks 4 can be increased or decreased according to usage requirements...

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Abstract

The invention discloses an adaptive order tracking vibration reduction metamaterial shaft structure, comprising a shaft base body, a shell and a unit cell unit. The unit cell unit comprises a constant-stiffness spring, mass blocks and variable-stiffness springs; the mass blocks are connected with the shaft base body and the shell through the constant-stiffness springs; and the adjacent mass blocks are connected through the variable-stiffness springs. The number of the mass blocks is eight; the mass blocks are annularly distributed on the periphery of the shaft base body; the number of the constant-stiffness springs is sixteen; and the number of the variable-stiffness springs is eight. The adaptive order tracking vibration reduction metamaterial shaft structure has the low-frequency vibration isolation capacity, the mass blocks with different thicknesses are designed in the circumferential direction of the shaft structure, a plurality of different band gaps are generated, and a wide low-frequency band gap is formed through combination. Adaptive order tracking can be achieved, the formed low-frequency forbidden band changes along with the change of the rotating speed, and the vibration and noise reduction effect is better.

Description

technical field [0001] The invention belongs to the cross technical field of vibration noise control and functional composite materials, and in particular relates to an adaptive order tracking vibration damping metamaterial shaft structure. Background technique [0002] For the NVH performance of rotating machinery, the torsional vibration of rotating components such as engine crankshafts and drive shafts has always been a concern. Torsional vibration will cause corresponding NVH and fatigue problems. For example, torsional vibration of a car will cause fatigue of teeth and tooth surfaces of some meshing gears, fatigue of elastic couplings, etc., causing vibration of steering wheel, seat, and pedals, thus causing vibration comfort question. Torsional vibration will also cause corresponding noise problems, such as engine start and stop noise, drive shaft resonance causing noise in the car, transmission gear meshing noise, etc. In addition to causing NVH and fatigue problems...

Claims

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Application Information

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IPC IPC(8): F16F15/14
CPCF16F15/1421
Inventor 任霞光吴昱东丁渭平杨明亮崔展豪
Owner SOUTHWEST JIAOTONG UNIV
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