Pipeline noise-reduction method considering section sound energy distribution

Abstract

The invention provides a pipeline noise-reduction method considering section sound energy distribution. The pipeline noise-reduction method comprises the following steps that the frequency spectrum and modal information of pipeline incident sound wave are obtained, and design of sound lining laid on the inner wall surface of a pipeline is performed aiming at the information; the noise-reduction effect of the sound lining on a high-frequency band is evaluated, the specific frequency point targeted by an additional sound absorbing material arranged inside the pipeline is confirmed, and acousticcharacteristic parameters under the specific frequency are calculated; according to the confirmed specific frequency point and acoustic characteristic parameters, the sound energy distribution of theincident sound wave on the pipeline section laid with the sound lining is calculated and obtained; the structure type of the additional sound absorbing material suitable for being arranged inside thepipeline is selected, and according to the principle of placing the additional sound absorbing material where sound energy is concentrated, primary design is performed on structural design parametersof the additional sound absorbing material arranged inside the pipeline; and design parameters of the additional sound absorbing material arranged inside the pipeline and the sound lining laid on theinner wall surface of the pipeline are synthesized and optimized, and a final pipeline noise-reduction scheme is obtained.

Description

technical field [0001] The present disclosure relates to the technical field of pipeline noise reduction, and in particular to a pipeline noise reduction method considering the distribution of sound energy in a section. Background technique [0002] Modern society is more and more concerned about noise control issues. At the industry, national and international levels, some industrial products that people often come into contact with or have a large amount of noise, such as air conditioning systems, automobile engines, aero engines, etc., have formulated more and more stringent regulations. noise emission standards. Many noise sources of these industrial products exist in pipelines, so acoustic treatment on pipelines to reduce noise is a very effective and commonly adopted approach. In pipeline noise control, the traditional technical means is to attenuate the sound wave in the pipeline along the direction of axial propagation by installing an acoustic lining on the inner w...

AI Technical Summary

Problems solved by technology

[0005] The traditional noise reduction technology for installing acoustic lining on the inner wall of the pipeline cannot effectively reduce the high-frequency, low-mode high-transmissible noise in the pipeline, and the existing internal acoustic treatment design of the pipeline lacks the necessary understanding and theory To physically guide this technical problem, this disclosure proposes a pipeline noise reduction method that considers the distribution of sound energy in the section, which is characterized in that it includes the following steps:

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