Method for separating noise sources of automobile

Abstract

The invention discloses a method for separating noise sources of an automobile. The method comprises the following steps: firstly measuring exterior vehicle noise of an accelerating automobile under different working conditions so as to obtain first to fifth noise sound pressure level; secondly, calculating sound pressure level of tire noise, sound pressure level of power assembly mechanical noise, sound pressure level of power assembly combustion noise, sound pressure level of exhaust silencer housing noise and sound pressure level of exhaust port noise; and thirdly, calculating energy contribution ratio of tire noise, energy contribution ratio of power assembly mechanical noise, energy contribution ratio of power assembly combustion noise, energy contribution ratio of exhaust silencer housing noise and energy contribution ratio of exhaust port noise, so that five exterior noise sources of the accelerating automobile can be separated, the composition of the noise sources are accurately distinguished so as to accurately select adopted a denoising means and improve the denoising effect; the requirement on engineer experience through noise rectification is reduced, and the cost of manpower training for relevant enterprises is reduced; and a systematized solution is provided for the relevant enterprises through the noise rectification.

Description

technical field [0001] The invention relates to the field of noise control, in particular to an automobile noise source separation method. Background technique [0002] With the improvement of living standards, people have higher and higher requirements on the performance of automobile NVH (Noise, Vibration, Harshness, noise, vibration and harshness). The state has strengthened the requirements for noise regulations. The current noise regulation is "GB 1495-2002 Limits and Measurement Methods of Accelerated Exterior Noise of Automobiles", which has clear requirements for the accelerated exterior noise of various vehicles. Since the composition of the noise outside the vehicle during acceleration is very complex, there is still no clear method to separate it, which is not conducive to the development of noise reduction work. [0003] The automobile noise source separation method of pass-by noise in the prior art mainly relies on the experience of NVH engineers to conduct co...

AI Technical Summary

Problems solved by technology

[0008] ① Solve the problem that the existing noise source separation methods have relatively high requirements on the ability of NVH engineers, and provide a set of programmatic implementation schemes, which can enable young engineers to quickly master the noise source separation method of pass-by noise

[0009] ② Solve the problem that the existing scheme is not systematic

Images