Concrete freeze-thaw life prediction method based on deterministic resampling particle filtering

Abstract

The invention relates to a concrete freeze-thaw life prediction method based on deterministic resampling particle filtering, and aims to solve the problem of prediction precision reduction caused by lack of particle diversity in standard particle filtering. From the angle of resampling technology improvement, the invention provides a concrete freeze-thaw life prediction method. According to the deterministic resampling algorithm, particle state values are considered, particle space distribution information is increased, and small-weight particles are fused through particle space sampling while original distribution of the particles is guaranteed, so that the small-weight particles cannot be discarded, the phenomenon that the diversity of the particles is deficient is overcome, and the service life prediction precision is improved.

Description

technical field [0001] The invention belongs to the field of concrete durability analysis and evaluation, and relates to a concrete freeze-thaw life prediction method based on deterministic resampling particle filter. Background technique [0002] Affected by many factors such as material properties, loading, chloride ion attack, carbonization, abrasion, alkali-aggregate reaction, and test errors, the evolution process of concrete freeze-thaw damage is highly uncertain. Traditional reliability prediction methods often use a large number of experiments to predict the freeze-thaw life in the form of curve fitting. However, a large number of experiments will consume expensive experimental resources, and it is only applicable to some specific conditions, so the applicability is poor. [0003] The particle filter algorithm can use a large number of "particles" to characterize the deterioration process of freeze-thaw damage under various uncertain factors. It has low requirements...

AI Technical Summary

Problems solved by technology

When the number of iterations is high or the number of particles is small, the accuracy of freeze-thaw lifetime prediction will decrease

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