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Dual extreme value response surface method for calculating leaf disc vibration reliability

A response surface method and reliability technology, applied in calculation, computer-aided design, complex mathematical operations, etc., can solve problems such as large amount of calculation, low efficiency, unsatisfactory accuracy and efficiency, etc., to reduce calculation cost and facilitate use , The effect of convenient ANSYS analysis function

Inactive Publication Date: 2017-03-08
HARBIN UNIV OF SCI & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The analysis of vibration reliability of aero-engine blisks is a complex dynamic probability analysis, which is actually a random process problem. The traditional response surface method is still very large in calculation for the vibration reliability of aero-engine blisks, and the efficiency Not high, can not meet the needs of its accuracy and efficiency

Method used

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  • Dual extreme value response surface method for calculating leaf disc vibration reliability

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Embodiment 1

[0025] A double extremum response surface method for calculating the reliability of blade disk vibration, comprising the following steps:

[0026] a. Determine the factors that affect the reliability of the blisk vibration;

[0027] b. Analyze the transfer process of fluid-thermal-structural coupling load among the influencing factors;

[0028] c. Perform vibration modal analysis and harmonic response analysis on the blade disk under the influence of flow-heat-structure coupling load to obtain the basic parameters of blade disk vibration reliability analysis;

[0029] d. Construct the mathematical model of the dual extreme value response surface method for the reliability analysis of the blisk vibration;

[0030] e. Analyze the vibration reliability of the blisk by using the dual extreme value response surface method;

[0031] f. Verify the validity of the dual extreme value response surface method.

Embodiment 2

[0033] According to the dual extreme value response surface method for calculating the vibration reliability of the blisk described in embodiment 1, in the step a, according to the analysis of the vibration failure of the blisk of the engine, determine the external load factors and the structure itself that affect the vibration reliability of the blisk parameter.

Embodiment 3

[0035] According to the double extremum response surface method for calculating the vibration reliability of the blisk described in embodiment 1, in the step b, the aerodynamic pressure data obtained by the fluid analysis is transmitted to the blisk structure through the interpolation method using the internal program of the ANSYS software, Use the element shape function and element node displacement to obtain the value required for the analysis object, use it as the input load, transfer it to the temperature field through the interface of the finite element software, and use the finite volume method to conduct flow-thermal coupling analysis; according to Fourier's heat conduction law and energy Conservation law, establish a three-dimensional heat conduction equation, conduct thermal analysis on the blisk combined with heat convection Newton cooling equation, and then use the finite element method to transfer the obtained coupling interface load data to the blisk structure, and ...

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Abstract

The invention discloses a dual extreme value response surface method for calculating leaf disc vibration reliability. The dual extreme value response surface method comprises the following specific processes of: determining a factor which influences the leaf disc vibration reliability; analyzing a transferring process between fluid-thermal-structural coupling loads in the influence factor; under the influence of the fluid-thermal-structural coupling loads, carrying out vibration modal analysis and harmonic response analysis on a leaf disc, and obtaining basic parameters for vibration reliability analysis; constructing a dual extreme value response surface method mathematical model for the leaf disc vibration reliability analysis; adopting the dual extreme value response surface method to carry out the leaf disc vibration reliability analysis; and carrying out effective verification on the dual extreme value response surface method. The method is high in calculation speed and accuracy, the change relationship of output response can be visually displayed, and a new approach is provided for reliability engineering analysis.

Description

technical field [0001] The invention relates to a design method for calculating the vibration reliability of an aeroengine blisk, which is a design method capable of considering the randomness of external loads and structural parameters, and belongs to the technical field of industrial technology reliability theory. Background technique [0002] When an aero-engine is working, the deformation of the blisk is affected by mechanical loads, centrifugal loads, temperature loads, aerodynamic loads, etc. The accidents that occur account for about 25% of the total failures and accidents, which seriously affect the safety, reliability and robustness of the engine. Performance, efficiency and other performance and engine detuning structure identification and prediction, and with the increasing gas temperature, speed, thrust-to-weight ratio, dynamic strength, etc. There are more and more faults, therefore, it is very necessary to analyze the vibration reliability probability of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/18
CPCG06F17/18G06F30/23G06F2119/08
Inventor 张春宜刘宝升王爱华孙田李志飞
Owner HARBIN UNIV OF SCI & TECH
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