Degradation modeling and life prediction method under impact damage recoverable condition

Abstract

The invention discloses a degradation modeling and life prediction method under an impact damage recoverable condition. The method comprises the following specific steps: step 1, collecting performance index data; step 2, establishing a degradation model; step 3, estimating parameters; and step 4, predicting the service life and reliability. The method has the advantages and effects that A) the condition that impact damage can be partially or completely recovered is considered, and the degradation life and reliability prediction precision of a product meeting the condition are improved; and B)the influence of impact on product performance degradation is considered, that is, the influence of the impact on the performance degradation rate and the performance index is considered at the sametime, so that the prediction method conforms to the reality better, and the prediction precision is improved; C) many existing degradation models are special conditions when some to-be-estimated parameters in the model are 0, and different existing degradation models can be represented by substituting the values of different to-be-estimated parameters.

Description

technical field [0001] The invention relates to a degradation modeling and life prediction method under the condition of recoverable impact damage, and belongs to the technical field of degradation modeling and life prediction. Background technique [0002] With the development of science and technology, the reliability of products is getting higher and higher. In view of the characteristics of long life and high reliability of products, the method of performance degradation modeling is usually used to predict the life of products. Traditional degradation modeling methods only consider that the impact damage to product performance indicators is irreversible. However, during the actual use of the product, the damage caused by the impact on the performance indicators of some products may recover partially or completely over time. Therefore, there may be errors in the life prediction of the product using the traditional method, which may result in the remaining Mistakes in maj...

AI Technical Summary

Problems solved by technology

[0009] In product degradation modeling and life prediction, most models only consider the irreversible damage caused by impact to product performance indicators, but in actual situations, many products can partially or completely recover from impact damage over time. As a result, traditional methods cannot solve practical engineering problems well

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