Engine combustion noise optimization prediction method and device and storage medium

Abstract

The invention relates to an engine combustion noise optimization prediction method and device and a storage medium, and the method comprises the steps: carrying out the combustion process simulation through constructing a finite element model of engine combustion, and obtaining an original sample space; performing a Latin hypercube sampling test in the original sample space, obtaining initial sample point data through sample generation and correlation control, and performing weight calculation according to a fuzzy analytic hierarchy process to obtain target sample point data; and generating a noise prediction approximation model according to the target sample point data and a sequence iteration response surface method, determining that a value of a multiple correlation coefficient of the approximation model is not less than a preset coefficient value, fitting a response relationship between the combustion parameters and the combustion noise, determining an optimal combustion parameter combination, and predicting the optimal combustion noise according to the optimal combustion parameter combination. According to the method, through reasonable sampling and weight distribution, combustion noise prediction with relatively high efficiency can be realized only by a small number of samples, and reference is provided for reasonable optimization.

Description

technical field [0001] The present application relates to the technical field of engine combustion noise prediction, in particular to a method, device and storage medium for optimal prediction of engine combustion noise. Background technique [0002] At present, national and industry regulations have increasingly stringent requirements on vehicle noise, and consumers' requirements on vehicle noise level and quality are also constantly increasing. Combustion noise is one of the main noise sources of vehicle engines, and the noise performance of the engine has become its main performance index as well as power, economy, and reliability. Combustion noise is due to the gas pressure in the cylinder rises sharply when the internal combustion engine is working, and the gas pressure in the cylinder rises sharply, resulting in gas pressure dynamic load and high-frequency oscillation, which directly excites the structure of the internal combustion engine to vibrate and transmits the n...

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Problems solved by technology

[0003] However, in the process of studying combustion noise, the noise test has relatively high requirements for the test environment, and must be carried out in a semi-anechoic chamber that meets the requirements.

Moreover, the experiment takes a long time. Finding the optimal and reasonable parameter configuration requires a large number of experiments. At the same time, it has a large uncertainty, and it is difficult to obtain accurate results.

Moreover, the optimization of the combustion process of the engine is often completed through the calibration of the electronic control data after the prototype is manufactured, which is expensive and time-consuming.

With the development of computing science, the simulation technology of internal combustion engine combustion process is becoming more and more mature, but the calculation time of a more accurate combustion model is very large, the calculation of combustion noise is time-consuming and labor-intensive, and the performance requirements of the computer are very high. Harsh

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