Calculation method for transmission loss of pipeline with straight-through perforated silencer

Abstract

The invention discloses a method for calculating and optimizing a transfer matrix and transfer loss of a silencing pipeline by combining a micro-perforated plate theory and a micro-perforated plate model on the basis of a traditional transfer matrix method aiming at a silencer pipeline structure with a straight-through perforated hole, which comprises the following steps of: aiming at the problem of aerodynamic noise in an automobile air conditioner pipeline, calculating the transfer matrix and the transfer loss of the silencing pipeline; a silencer pipeline structure with a straight-through perforated hole is designed, and the basic composition and related parameters of the silencing structure are defined. The method has the following positive effects: aiming at the problem of aerodynamic noise generated in an automobile air conditioner pipeline, the silencer pipeline structure with the straight-through perforated holes is designed, and on the basis of a traditional transfer matrix method, calculation of a transfer matrix and transfer loss of a silencing pipeline is carried out by combining a micro-perforated plate theory and a micro-perforated plate model, so that the design of the silencer pipeline structure with the straight-through perforated holes is realized. According to the method, the transmission loss can be efficiently and accurately calculated, so that compared with a finite element calculation method, the calculation result is accurate, and meanwhile, the calculation time and the calculation amount are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of pipeline noise control, in particular to a method for calculating the transmission loss of pipelines with straight-through perforated mufflers. Background technique [0002] As an important system for adjusting the temperature inside the car and defrosting and defogging, automotive air conditioning plays an important role in ensuring temperature comfort and driving safety. There is air turbulence in the pipeline system of automobile air conditioning, which produces aerodynamic noise. The air-conditioning pipeline is directly connected to the cockpit, and aerodynamic noise is directly transmitted to the cockpit through the air-conditioning pipeline, becoming one of the main noise sources in the cockpit. For the problem of aerodynamic noise, installing a muffler can effectively reduce the transmission of noise along the pipeline. [0003] Aiming at the problem of aerodynamic noise in the automobile air-co...

AI Technical Summary

Problems solved by technology

[0007] (1) Aiming at the problem of aerodynamic noise in the automobile air-conditioning pipeline, a muffler pipeline structure with straight-through perforation is designed;

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