Rotor and stator subsystem rub-impact reliability analysis method based on agent model

A proxy model and analysis method technology, applied in the direction of electrical digital data processing, instruments, geometric CAD, etc., can solve the problems of no fast and effective evaluation method, uncertain analysis and quantification, etc., to reduce the number of calculation sample points and improve calculation efficiency Effect

Pending Publication Date: 2021-11-26
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

At present, there is no fast and effective evaluation method for the analysis of the failure probability of rotor-stator rubbing. How to analyze and quantify the uncertainty of rotor-...

Method used

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  • Rotor and stator subsystem rub-impact reliability analysis method based on agent model
  • Rotor and stator subsystem rub-impact reliability analysis method based on agent model
  • Rotor and stator subsystem rub-impact reliability analysis method based on agent model

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Embodiment

[0164] In order to further illustrate the reliability analysis method of this application, a case is used for a specific introduction. Description of drawings: figure 1 The rubbing reliability analysis process of the rotor-stator based on the kriging model proposed by the present invention.

[0165] figure 2 As shown, it is a schematic diagram of the finite element friction rubbing simulation of a double disc and a single rotor. Only the single point rubbing of the left disc is considered. The dynamic motion differential equation of the rotor-stator rubbing model described in step 1 is established by the finite element method as follows:

[0166]

[0167] Among them, M, C, G and K are the system mass, damping, gyroscope and stiffness matrix respectively, H is the Heaviside function, F u is the rotor unbalance excitation, T, and are the displacement, velocity and acceleration vectors respectively, ω is the rotor speed, [ is the vibration displacement of the rotor contac...

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Abstract

The invention discloses a rotor and stator subsystem rub-impact reliability analysis method based on an agent model. The method comprises the steps of 1, establishing a finite element simulation model of rotor and stator rub-impact; 2, finding out uncertain parameters existing in a design stage, processing, assembling and working operation links, determining main uncertain sources influencing rotor and stator rub-impact and probability distribution types of the parameters through sensitivity analysis, and inputting the parameters; 3, adding carefully selected samples near the curved surface based on the limit state by utilizing a self-adaptive experimental design algorithm, and constructing an agent model to replace a finite element simulation model; 4, predicting the function response of the MCS sample point at a given initial rotating speed by using the trained agent model, and calculating the failure probability according to the function response result; and 5, iteratively increasing the rotating speed within the considered rotating speed range, repeating the step 4, sequentially calculating the failure probability at each rotating speed, and finally obtaining a failure probability curve.

Description

technical field [0001] The invention relates to the technical field of reliability, in particular to an agent model-based rubbing reliability analysis method for a rotor-static subsystem. Background technique [0002] Rotating machinery such as aero-engines, marine gas turbines, and compressors require high performance, so that the design gap between the rotor and the stator is getting smaller and smaller, which is likely to cause rubbing failures during the operation of the equipment. Rubbing is inevitable as a secondary fault, and it is difficult to balance the contradiction between no rubbing and reduced clearance in the design of rotating machinery. The rubbing between the rotor and the stator will generate high impact and friction, which will affect the safe operation of the system, and may cause blade breakage or casing containment problems, causing severe vibration and even catastrophic accidents. [0003] The vibration response caused by rubbing of rotating and stat...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/17G06F111/08G06F119/02
Inventor 马新星张振果钟驭才华宏星
Owner SHANGHAI JIAO TONG UNIV
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