Fluid-solid interaction mechanical metamaterial pipeline structure for vibration attenuation and noise elimination and manufacturing method thereof

A fluid-structure coupling, metamaterial technology, applied in the direction of pipe components, mechanical equipment, pipes/pipe joints/pipe fittings, etc., can solve the problem of difficult to achieve low-frequency broadband vibration reduction and noise reduction, and achieve good low-frequency effects.

Active Publication Date: 2021-07-09
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem in the prior art that it is difficult to realize the function of low-frequency broadband vibration reduction and noise reduction, so as to provide a fluid-solid coupling mechanical metamaterial pipeline structure and preparation method for vibration reduction and noise reduction

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  • Fluid-solid interaction mechanical metamaterial pipeline structure for vibration attenuation and noise elimination and manufacturing method thereof
  • Fluid-solid interaction mechanical metamaterial pipeline structure for vibration attenuation and noise elimination and manufacturing method thereof
  • Fluid-solid interaction mechanical metamaterial pipeline structure for vibration attenuation and noise elimination and manufacturing method thereof

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Embodiment Construction

[0037] The present invention is based on the innovative design method of mechanical super material, introduces the design idea of ​​the structural low frequency broadband to the pipeline design, overcoming the shortcomings of the traditional noise reduction measures of the pipeline. Mechanical super material refers to a "new material" that can achieve extraordinary physical properties in the subpoope long band in the cycle or non-cycle of continuous media, which can achieve "new materials" that is quite different from substances in nature in the subpoope long band, which can achieve elastic waves and acoustic waves. Emperous manipulation makes it in many areas of application prospects, such as stealth cloaks, lenses, acoustic imaging, sound sieves, vibration and noise reduction.

[0038] In order to make the objectives, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying dra...

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Abstract

The invention provides a fluid-solid interaction mechanical metamaterial pipeline structure for vibration attenuation and noise elimination and a manufacturing method thereof. The pipeline structure comprises a plurality of vibration attenuation and noise reduction pipeline primitive cells which are connected in series. Each vibration attenuation and noise reduction pipeline primitive cell comprises a first connecting pipe, a second connecting pipe and a third connecting pipe, and vibrator piece units, wherein the first connecting pipe, the second connecting pipe and the third connecting pipe are sequentially connected, the vibrator piece units are located on a part of the outer wall of the second connecting pipe and surround the second connecting pipe, the inner diameter of the first connecting pipe is gradually reduced in the direction from the first connecting pipe to the second connecting pipe, the second connecting pipe is in a straight pipe shape, and the inner diameter of the third connecting pipe is gradually reduced in the direction from the third connecting pipe to the second connecting pipe. The fluid-solid interaction mechanical metamaterial pipeline structure for vibration attenuation and noise elimination has good low-frequency broadband vibration attenuation and noise elimination functions.

Description

Technical field [0001] The present invention belongs to the field of piping noise reduction and mechanical supercons, and more particularly to a stream solid coupling mechanical super material pipeline structure and preparation method for damping the noise. Background technique [0002] The filled pipeline system is widely used in aerospace, ship, high-speed rail, automotive and other equipment, and the fluid and pipeline structure generate a stream solid coupling when operating in normal operation: the fluid is in the pipeline structure. The pressure pulsation and speed pulsation generated by circulating flow cause the tube wall vibration of the pipeline structure, and then generate noise, and the vibration of the tube wall causes a change in fluid morphology in the tube. The vibration and noise problem of the stream-solid coupling line system is very serious. According to statistics, in real industrial production, 75% of the pipeline joints in the filling pipeline system or the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/02F16L55/033
CPCF16L55/02F16L55/033
Inventor 郁殿龙胡洋华刘江伟温激鸿张振方胡兵
Owner NAT UNIV OF DEFENSE TECH
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