Fuzzy double response surface method for calculating vibration reliability of blade disk

A dual-response and reliability technology, applied in calculation, complex mathematical operations, design optimization/simulation, etc., can solve the problems that the calculation speed and accuracy cannot meet the requirements, and does not consider the correlation of multiple failure modes, etc., to achieve convenient ANSYS analysis functions, reduced computing costs, and ease of use

Pending Publication Date: 2018-10-26
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

The traditional response surface method does not consider the correlation of multiple failure modes, and the calculation speed and accuracy cannot meet the requirements

Method used

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  • Fuzzy double response surface method for calculating vibration reliability of blade disk

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The multiple response surface method for calculating the vibration reliability of mistuned blisks includes the following steps:

[0031] a. Simulate blade detuning by changing the elastic modulus of each blade;

[0032] b. Determine the basic parameters of the blisk detuning reliability analysis as random input variables;

[0033] c. Analyze the transfer process between fluid-solid coupling loads among the influencing factors;

[0034] d. Under the influence of fluid-solid coupling load, conduct vibration modal analysis and transient response analysis on the blisk to obtain the basic parameters of the blisk vibration reliability analysis;

[0035] e. Constructing the multiple response surface method mathematical model for the reliability analysis of blade disk vibration;

[0036] f. Using the multiple response surface method to analyze the vibration reliability of the blisk;

[0037] g. Verify the effectiveness of the multiple response surface method.

Embodiment 2

[0039] According to the multiple response surface method for calculating the vibration reliability of a mistuned bladed disk described in Embodiment 1, in the step a, the bladed disk structure is divided into hexahedral meshes by using the ABSYS Workbench software.

Embodiment 3

[0041] According to the multiple response surface method for calculating the vibration reliability of mistuned blisks described in Embodiment 1, in the step b, according to the actual working conditions of the blisks of the engine, the external load factors and the structural performance of the blisks that affect the reliability of the blisks are determined. parameter.

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Abstract

The invention discloses a fuzzy double response surface method for calculating the vibration reliability of a blade disk. The method comprises the following steps: building a finite element model of the blade disk; determining a basic parameter which affects the vibration reliability of the blade disk as a random input variable; acquiring the basic parameter for analyzing the vibration reliabilityof the blade disk through static analysis, modal analysis and harmonious response analysis of the model, thus completing the deterministic analysis of the blade disk; building a double response surface mathematical model; building a fuzzy reliability analysis mathematical model, and analyzing the vibration reliability of the blade disk; and verifying the effectiveness of the fuzzy double responsesurface method. The method disclosed by the invention is high in calculation speed and high in the precision, can directly show a varying relation of an output response, and provides a new way for the reliability engineering analysis.

Description

technical field [0001] The invention is a fuzzy dual response surface method for calculating the vibration reliability of an aeroengine blade disc, which combines fuzzy mathematics and conventional reliability design theory, and belongs to the technical field of industrial technology reliability theory. Background technique [0002] As a key component of an aero-engine, the blisk structure directly affects the structural integrity and reliability of the whole machine, and the vibration problem seriously threatens the structural strength and life of the aero-engine. Therefore, it is very necessary to analyze the vibration reliability probability of the blisk of the engine. [0003] In recent years, reliability theories and methods have been widely used in the reliability analysis of engineering structures. With the establishment of various new complex systems and the implementation of engineering projects, the contradiction between conventional reliability design theory and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/18
CPCG06F17/18G06F30/23
Inventor 张春宜李成伟井慧哲
Owner HARBIN UNIV OF SCI & TECH
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