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

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...

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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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