Turbine rotor creep damage real-time calculation method based on a finite element model

A steam turbine rotor, real-time calculation technology, applied in calculation, computer-aided design, design optimization/simulation, etc., can solve problems such as difficulty in blending real-time performance and high precision

Active Publication Date: 2019-03-26
UNIV OF JINAN
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  • Application Information

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a real-time calculation method for the creep damage of the steam turbine rotor based o...

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  • Turbine rotor creep damage real-time calculation method based on a finite element model
  • Turbine rotor creep damage real-time calculation method based on a finite element model
  • Turbine rotor creep damage real-time calculation method based on a finite element model

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Embodiment Construction

[0047] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0048] see Figure 1 to Figure 8. It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, so that only the components related to the present invention are shown in the diagrams rather than the number, shape and Dimensional drawing, the shape, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the...

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Abstract

The invention provides a turbine rotor creep damage real-time calculation method based on a finite element model. The turbine rotor creep damage real-time calculation method comprises the steps that atemperature field and a stress field of a rotor are calculated through finite element analysis software; Extracting temperature and stress data of the key part; Performing normalization processing ontemperature, pressure, rotating speed and stress data related to creep damage calculation; Establishing a creep stress real-time calculation model by adopting a multivariate regression method; Analyzing and fitting stress; Calculating a damage function relationship, and calculating creep damage in real time; And establishing a creep damage real-time calculation system structure. The problem of real-time calculation of rotor creep damage in the prior art can be solved, and the method has high precision.

Description

technical field [0001] The invention relates to the field of creep damage calculation and evaluation of a steam turbine rotor, in particular to a finite element numerical calculation method and a multiple regression real-time calculation method. Background technique [0002] The rotor is the core component of the steam turbine unit. It usually operates under the harsh working conditions of high temperature and high pressure, which is prone to cracks and damage to metal materials. Rotor damage mainly includes low-cycle fatigue damage and high-temperature creep damage. The effects of low-cycle fatigue damage and high-temperature creep damage on the rotor are coupled. It is necessary to consider the coupling effect of the two types of damage in the actual operation of the unit. Creep damage of metal materials mainly refers to the phenomenon that the plastic strain gradually increases under long-term high temperature environment. The rotor metal material is generally low-carbon...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/17G06F2119/06
Inventor 孙永健王孝红
Owner UNIV OF JINAN
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