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Interval Calculation Method of Structural Failure Probability Considering Interval Uncertainty

A technology of failure probability and calculation method, applied in design optimization/simulation, special data processing application, CAD numerical modeling, etc., can solve problems such as poor calculation accuracy, and achieve the effect of ensuring calculation accuracy and improving calculation efficiency

Inactive Publication Date: 2020-12-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the structural failure probability interval calculation method considering the interval uncertainty provided by the present invention solves the technical problem of poor calculation accuracy in the prior art

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  • Interval Calculation Method of Structural Failure Probability Considering Interval Uncertainty
  • Interval Calculation Method of Structural Failure Probability Considering Interval Uncertainty
  • Interval Calculation Method of Structural Failure Probability Considering Interval Uncertainty

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Embodiment Construction

[0021] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0022] refer to figure 1 , figure 1 shows the flow chart of the structural failure probability interval calculation method considering the interval uncertainty; as figure 1 As shown, the method includes steps S1 to S4.

[0023] In step S1, the random design variables and interval design variables of the structure are analyzed, and the functional function of the structure is constructed:

[0024] g=g(X,Y)

[0025] Among ...

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Abstract

The invention discloses a structural failure probability interval calculation method considering the interval uncertainty, which includes analyzing the random design variables and interval design variables of the structure, and constructing the functional function of the structure; converting the random design variables into standard normal random variables, Establish a mixed reliability design model; decouple the mixed reliability design model into a probability analysis model and an interval analysis model, combine the conjugate finite step method and Taylor approximation method to iteratively solve the probability analysis model and interval analysis model; calculate the failure of the structure probability interval. Using the calculation method of this method to carry out the reliability design of the structure can analyze the reliability of the structure more scientifically and reasonably. While ensuring the calculation accuracy, it also has high calculation efficiency and greatly improves the reliability design level of the structure.

Description

technical field [0001] The invention relates to the assessment of structural reliability, in particular to a method for calculating the structural failure probability interval considering the interval uncertainty. Background technique [0002] In traditional engineering structure design, the commonly used methods are mostly based on deterministic mathematical models, that is, design variables are treated as deterministic variables. However, uncertain factors generally exist in the actual structural design process, such as the uncertainty of material parameters, the uncertainty of geometric parameters, the uncertainty of the magnitude of the load and the uncertainty of the initial boundary conditions. In order to analyze and deal with these uncertain variables to ensure the safety and reliability of structures, structural reliability design methods have gradually received attention and application, and have always been a research hotspot in the field of reliability. [0003]...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/10
CPCG06F30/20G06F2111/10
Inventor 黄洪钟黄鹏李彦锋米金华钱华明
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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