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

A particle filtering and life prediction technology, applied in artificial life, instruments, electrical and digital data processing, etc. Effect

Active Publication Date: 2021-06-11
NANJING INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment Construction

[0069] The deterministic resampling particle filter concrete freeze-thaw life prediction method of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0070] like figure 1 As shown, a concrete freeze-thaw life prediction method based on deterministic resampling particle filter includes the following steps:

[0071] Step 1. Based on the relative dynamic elastic modulus attenuation model of the single-segment mode, construct the state equation and its noise model describing the law of multi-factor freeze-thaw damage degradation;

[0072] In step 1, the expression of the state equation is:

[0073]

[0074] In formula (1), E t Indicates the relative dynamic elastic modulus at time t of the freeze-thaw cycle; C indicates the damage acceleration, and A indicates the initial damage velocity, both of which can be obtained through experimental fitting; Δt indicates the time interval between time...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06N3/00G06F119/02G06F119/04G06F119/10
CPCG06F30/27G06N3/006G06F2119/02G06F2119/04G06F2119/10
Inventor 杨伟博包永强赵杰潘岳张健朱昊刘婷婷余雨宗昕
Owner NANJING INST OF TECH
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