Sound elimination element position optimization design method based on acoustic mode of air inflow system

Abstract

The invention discloses a sound elimination element position optimization design method based on an acoustic mode of an air inflow system. The method includes the steps that air inlet noise of an initial scheme of the air inflow system is acquired; whether peak noise with the sound pressure level larger than a set sound pressure level threshold value exists in the air inlet noise of the initial scheme or not is analyzed, and if yes, the problem frequency corresponding to the peak noise with the sound pressure level larger than the set sound pressure level threshold value is determined; simulating calculation of the acoustic mode of the air inflow system is carried out; sound pressure cloud picture distribution of the acoustic mode of the air inflow system at the problem frequency is checked, and top three good positions, aiming at the problem frequency, of a sound elimination element are preliminarily determined; and the optimum position, aiming at the problem frequency, of the sound elimination element is determined in combination with the arrangement space of a cabin, and then optimization design is finished. By the adoption of the method, precision of the positions of the soundelimination element can be achieved, the maximum sound elimination effect can be conveniently exerted, and the sound quality of a whole vehicle is improved.

Description

technical field [0001] The invention belongs to the field of automobile air intake systems, and in particular relates to a position optimization design method for muffler elements based on the acoustic mode of the intake system. Background technique [0002] The low-frequency roar and mid-frequency resonance of the air intake of the naturally aspirated engine are particularly prominent, and often become the main contributors to the roar in the car. In order to solve the problem of low-frequency roar and mid-frequency resonance at the air intake, it is usually necessary to add noise reduction components to the air intake system. The position of the muffler element directly affects the muffler effect of the muffler element in the entire air intake system, which in turn affects the sound quality of the vehicle and the cost of the entire air intake system. The traditional way of anechoic element layout is: based on the existing layout space of the engine room, it can be added w...

AI Technical Summary

Problems solved by technology

This arrangement is difficult to ensure the maximum noise reduction effect of the noise reduction components, and it is difficult to optimize the best position in the later stage or the cost of modification is huge

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