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Low frequency broadband local resonant structure with super damping properties

A local resonance and super damping technology, applied in inertial effect shock absorbers, shock absorbers, building components, etc., can solve the problems of narrow vibration band gap, can not bear the vibration isolation effect of wide band gap, etc., and achieve good low frequency vibration reduction. effect, improving low-frequency vibration characteristics, and suppressing transmission

Active Publication Date: 2020-01-17
NAT UNIV OF DEFENSE TECH
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  • Claims
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Problems solved by technology

However, this method only uses a resonance frequency of the local resonance structure, and the vibration band gap is relatively narrow, which cannot withstand the vibration isolation effect of the wide band gap in the low frequency range.

Method used

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  • Low frequency broadband local resonant structure with super damping properties
  • Low frequency broadband local resonant structure with super damping properties
  • Low frequency broadband local resonant structure with super damping properties

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Embodiment Construction

[0036] The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

[0037] The low frequency herein refers to the vibration frequency ≤ 500 Hz. The system in this paper refers to the beam or plate periodically added with the resonant structure of the present invention, and the overall system composed of the two.

[0038] The present invention provides a low-frequency broadband local resonance structure with super-damping characteristics, installed under the base beam 100, including an elastic frame for offsetting vibration by deformation and a rubber strip 210 passing through the center of the elastic frame and equally dividing the elastic frame; The first end 310 of the elastic frame is connected to the base beam 100; t...

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Abstract

The invention provides a low-frequency, broad-band and local-area resonance structure with super damping characteristics. The structure comprises a rhombic frame; a first end of the rhombic frame is connected with a basal body beam through a rubber block; rubber bars are arranged on short diagonal lines in the rhombic frame; and one ends of the rubber bars are connected with the first end of the rhombic frame, and the other ends are connected with a second end of the rhombic frame. Mass blocks are arranged at two ends of the rhombic frame, and the structure is periodically added on a beam unit, so that the low-frequency band gap is widened, and the vibration attenuation is enhanced. The structure is better in geometric nonlinearity, can generate additional damping and mass, and effectivelyimproves low-frequency vibration characteristics of a system.

Description

technical field [0001] The invention relates to the technical field of vibration propagation isolation, in particular to a low-frequency broadband local resonance structure with super-damping characteristics. Background technique [0002] In order to realize the control of mechanical vibration, the prior art mainly controls the vibration source and the propagation of vibration. Vibration source control means: select low-vibration equipment as the vibration source or perform vibration isolation on the vibration generated by the vibration source used, and control the transmission of vibration by changing the way of vibration transmission to achieve vibration suppression. [0003] Controlling the propagation of vibration includes active control and passive control. Using active control to control vibration propagation requires adding a control system to the structure of the vibration propagation path. This control method increases the complexity of the structure. Passive cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F7/10E04H9/02E04B1/98
CPCE04B1/98E04H9/02F16F7/1022F16F7/1028
Inventor 郁殿龙杜春阳刘江伟温激鸿
Owner NAT UNIV OF DEFENSE TECH
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