Reliability analysis method for hydraulic structure

A technology of hydraulic structures and analysis methods, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as cumbersome calculations, difficult control of precision, and unsuitable engineering

Inactive Publication Date: 2013-08-28
HOHAI UNIV
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  • Application Information

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Problems solved by technology

Whether it is based on perturbation solution or stochastic finite element of statistical method, it is inevitable that the calculation is too large and the precision is not easy to control.
The principle of maximum entropy is a method of approximating the probability density function of the functional function, which is cumbersome to calculate and not applicable in engineering

Method used

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  • Reliability analysis method for hydraulic structure
  • Reliability analysis method for hydraulic structure
  • Reliability analysis method for hydraulic structure

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Embodiment 1

[0063] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 as shown,

[0064] (1) The present invention takes Yongji No. 2 control gate as an example. The gate is open as a whole and has two holes in the lock chamber. The calculated working condition adopts the design water level above the gate as 2.6m, and there is no water under the gate. According to the existing experimental data, the internal friction coefficient x between the bottom plate and the foundation is selected 1 , self-weight of reinforced concrete x 2 , upstream water level x 3 and substrate adhesion x 4 As the main factors affecting the anti-sliding stability of the brake system, these four factors are all random variables (see: Document 6 Zou Chunxia. Reliability Analysis of Hydraulic Structures Based on the Principle of Maximum Entropy [D], Inner Mongolia Agricultural University, 2004 .). The functional function g(x) of the brake

[0065] ...

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Abstract

The invention discloses a reliability analysis method for a hydraulic structure. The reliability analysis method comprises the steps of determining distribution of factors affecting the reliability of the hydraulic structure by utilizing stable distribution, then, generating random numbers of the factors, which correspond to a stable distribution model, combining means of the factors, which correspond to experimental data, reducing values of the factors in performance functions, and finally, calculating the failure probability of the hydraulic structure through the preference functions. The reliability analysis method is characterized in that the stable distribution and the random numbers are directly described, information of asymmetry, trailing and the like of the factors affecting the reliability of the hydraulic structure is utilized, values of test times are determined through convergence curves of the failure probability changing along with the test times, so that calculation results of the failure probability are accurate, effects of time scale effects of principal factors on the failure probability are studied, and reference information is provided for formulating reinforcement and maintenance schemes of hydraulic structures.

Description

technical field [0001] The invention belongs to the field of engineering structure reliability, and in particular relates to a method for analyzing the reliability of hydraulic structures. Background technique [0002] The reliability analysis of hydraulic structures is one of the main prerequisites for judging whether hydraulic structures can serve safely. In structural design, there are many factors that affect the reliability of hydraulic structures. How to use the existing data to check the stability is a key concern of designers. [0003] When the existing methods describe the probability distribution of factors affecting the reliability of hydraulic structures, they mostly use statistical distributions such as normal distribution, lognormal distribution, and extreme value type I (see: Document 1 Zhao Zhanbiao, Zou Chunxia, ​​Sun Haiquan. arc On consistent determination of structural capacity statistics for reliability analysis[J].Journal of ship mechanics, 2002.6(3):...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 陈文梁英杰
Owner HOHAI UNIV
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