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Probabilistic statistical analysis method for solving the non-uniqueness of dam concrete mechanics parameter inversion

A technology of mechanical parameters and probability statistics, applied in the fields of calculation, complex mathematical operations, electrical digital data processing, etc., can solve the problems of non-unique multi-parameter inversion and non-unique inversion of dam concrete mechanical parameters, and achieve multi-parameter inversion. Inverting non-unique effects

Active Publication Date: 2019-01-01
CHINA THREE GORGES UNIV
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  • Abstract
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a probabilistic statistical analysis method to solve the non-unique inversion of mechanical parameters of dam concrete, which can overcome the defects of large differences in the inversion values ​​of mechanical parameters under different calculation conditions and different initial values , to obtain stable and robust inversion parameter values, so as to solve the problem of non-unique multi-parameter inversion

Method used

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  • Probabilistic statistical analysis method for solving the non-uniqueness of dam concrete mechanics parameter inversion
  • Probabilistic statistical analysis method for solving the non-uniqueness of dam concrete mechanics parameter inversion
  • Probabilistic statistical analysis method for solving the non-uniqueness of dam concrete mechanics parameter inversion

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Experimental program
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Embodiment 1

[0041] Project Overview

[0042] A water conservancy project is located in the alpine region of Northwest China, and it is a large-scale water conservancy project. The total storage capacity of the hub reservoir is 2.419 billion m 3 , the normal storage level of the reservoir is 739.00m, and the stagnant water level is 680.00m. The main dam of the hub is a full-section roller compacted concrete gravity dam with a length of 1489m, a maximum height of 121.50m and a crest elevation of 745.50m. The scale of the water conservancy project is a large (1) project of class I. The average temperature at the dam site for many years is 2.7°C. Historically, the extreme minimum temperature has been observed to reach -49.8°C, and the extreme maximum temperature has reached 40.1°C. The environmental conditions are extremely harsh.

[0043] Monitoring arrangement

[0044] A typical retaining dam section is selected as the analysis dam section. Three vertical monitoring points are arranged i...

Embodiment 2

[0114] Rationality verification of inversion results

[0115] In order to verify the correctness of the inversion calculation, the obtained physical and mechanical parameters of the dam body and dam foundation were input into the finite element for forward analysis calculation, and the calculated relative displacement and the measured relative displacement were obtained.

[0116] Table 5 Comparison of measured displacement and calculated displacement of hydraulic components

[0117]

[0118]

[0119] From the calculation results, the displacement calculated by the finite element method is close to the measured displacement of the hydraulic component. Since the measured displacement is relatively small, it affects the inversion accuracy to a certain extent, but overall, the calculated displacement based on the inversion value and the measured displacement of each measuring point have basically an error of less than 5%, which shows that the patent inversion of the dam body...

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Abstract

The invention relates to a probability statistical analysis method for solving non-uniqueness of dam concrete mechanical parameter inversion, which comprises the following steps: step 1, separating measured water pressure displacement component; 2, for a plurality of sets of value of parameters to be inverted; 3, obtaining the calculated relative displacement under the action of the water level attwo different times before and after a certain calculation work condition; 4, obtaining a trained neural network model; 5, obtaining the corresponding mechanical parameter inversion value under the selected calculation condition; 6: getting the rest n-1 group of inversion values of corresponding mechanical parameters at different water levels under different computational conditions; 7: determining the final mechanical parameter inversion value with 80% guarantee rate, so as to solve the non-uniqueness problem of multi-parameter inversion. The invention provides a probability statistical analysis method for solving the non-uniqueness of dam concrete mechanics parameter inversion, which can overcome the defect that the mechanics parameter inversion value has great difference under different calculation conditions and different initial values.

Description

technical field [0001] The invention relates to the research field of dam concrete mechanical parameters, in particular to a probability statistical analysis method for solving the inversion non-uniqueness of dam concrete mechanical parameters. Background technique [0002] The environmental conditions of the dam are complex and changeable, which leads to the complex working behavior of the dam during the operation period. When the concrete mechanical test is carried out indoors, due to the size effect of the specimen, wet screening, standard maintenance and "point parameters", etc., the dam There is a big difference between the actual mechanical parameters of concrete and the indoor test parameters. In order to obtain the current real physical and mechanical parameters of the dam, inversion analysis of the physical and mechanical parameters of the dam body and dam foundation based on prototype observation data is widely used in concrete dam engineering. The acquisition of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/18
CPCG06F17/18G06F30/13G06F2119/06
Inventor 黄耀英肖磊万智勇王嵛蔡忍周勇丁宇
Owner CHINA THREE GORGES UNIV
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