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Fuzzy reliability analysis method for turbine tenon connection structure

A technology of connection structure and analysis method, which is applied in the field of fuzzy reliability analysis of turbine tenon connection structure, can solve the problems that cannot meet the needs of the project and low analysis efficiency, and achieve the effect of improving efficiency and accuracy

Active Publication Date: 2020-10-16
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] At present, the Monte Carlo method is generally used to analyze the fuzzy reliability of structures, but the analysis efficiency of this method is low and cannot meet the needs of engineering.

Method used

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  • Fuzzy reliability analysis method for turbine tenon connection structure
  • Fuzzy reliability analysis method for turbine tenon connection structure
  • Fuzzy reliability analysis method for turbine tenon connection structure

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Embodiment Construction

[0069] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0070] The present disclosure provides a fuzzy reliability analysis method for a turbine tenon connection structure. The fuzzy reliability analysis method for a turbine tenon connection structure can transform a fuzzy reliability analysis problem into a traditional reliability analysis problem by adding auxiliary random variables. Therefore, the present disclosure can apply the Kriging model (Kriging model) to solve the fuzzy ...

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Abstract

The invention relates to the technical field of reliability analysis, and provides a fuzzy reliability analysis method for a turbine tenon connection structure, and the invention is characterized in that the method comprises the steps of dividing grids in a three-dimensional model of the turbine tenon connection structure, so as to build a finite element model of the turbine tenon connection structure; determining a performance function of the turbine tenon connection structure according to the finite element model; on the basis of the performance function, adding auxiliary random variables toestablish a generalized performance function, and wherein the auxiliary random variables obey standard normal distribution; constructing a Kriging model according to the generalized performance function; and on the basis of the Kriging model, obtaining the fuzzy failure probability of the turbine tenon connection structure. According to the method, the fuzzy reliability of the turbine tenon connection structure can be efficiently and accurately analyzed.

Description

technical field [0001] The present disclosure relates to the technical field of reliability analysis, in particular to a fuzzy reliability analysis method for a tenon joint structure of a turbine. Background technique [0002] In traditional reliability analysis, the limit state that distinguishes the structural failure state from the safe state is a clear boundary, and we call it a dual state at this time. However, in practical engineering problems, the boundary between the safe state and the failed state is often not clear, and there is a transition process between the safe state and the failed state, which is neither completely safe nor completely ineffective, but with a certain The degree of belonging to safe and failure, respectively, is called fuzzy state. [0003] At present, the Monte Carlo method is widely used to analyze the fuzzy reliability of structures, but the analysis efficiency of this method is low and cannot meet the needs of engineering. [0004] The ab...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F119/02
CPCG06F30/17G06F2119/02
Inventor 张晓博吕震宙员婉莹
Owner NORTHWESTERN POLYTECHNICAL UNIV
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