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Nuclear power plant metal part environment promotion fatigue life evaluation method

A technology for metal parts and fatigue life, applied in the field of structural integrity assessment of nuclear power equipment, can solve the problems of inability to objectively assess the fatigue life of metal parts, lack of analysis details, etc., to remove conservatism, optimize calculation processing algorithms, improve efficiency and The effect of precision

Pending Publication Date: 2021-08-06
SUZHOU NUCLEAR POWER RES INST +2
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Problems solved by technology

This case recommends a method for evaluating the fatigue life of metal parts in nuclear power plants, but the lack of necessary regulations and descriptions for the analysis details makes it impossible for technicians to use this method to evaluate the fatigue life of metal parts more objectively

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  • Nuclear power plant metal part environment promotion fatigue life evaluation method
  • Nuclear power plant metal part environment promotion fatigue life evaluation method
  • Nuclear power plant metal part environment promotion fatigue life evaluation method

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Embodiment Construction

[0082] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0083] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a nuclear power plant metal part environment promotion fatigue life evaluation method, which comprises the following steps: carrying out metal part fatigue life analysis to obtain a fatigue accumulation use factor corresponding to an analysis position on a metal part; determining a corresponding environmental impact factor calculation formula according to the material type of the metal part; obtaining a time period in a tensile stress state through stress analysis, and obtaining environmental influence factors corresponding to different time points in the tensile stress state according to the calculation formula; obtaining environment influence factors corresponding to one or more stress peak-valley value pairs of the metal part through integral summation operation; and according to the fatigue accumulation use factor and the stress peak-valley value, pairing the corresponding environmental influence factor, and obtaining the environmental promotion fatigue life of the metal part. The nuclear power plant metal part environment promotion fatigue life evaluation method provided by the invention considers the influence of the service environment on the fatigue life of the metal part, so that the evaluation is more objective and accurate.

Description

technical field [0001] The invention relates to the technical field of structural integrity assessment of nuclear power equipment, in particular to an environment-promoted fatigue life assessment method for metal components of a nuclear power plant. Background technique [0002] Studies have shown that the service environment has a great influence on the fatigue life of metal parts in nuclear power plants. However, the existing nuclear power design codes, such as ASME Code III, use the fatigue life curves of materials measured in air at room temperature to evaluate the fatigue life of metal components, and do not consider the influence of the service environment of materials. In order to solve this problem, the American Society of Mechanical Engineers published "ASME Code Case N-792 Fatigue Evaluations Including Environmental Effects" in 2010. This case recommends a method for evaluating the fatigue life of metal parts in nuclear power plants, but the lack of necessary regu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/2045G06F30/23
CPCG01N33/2045G06F30/23
Inventor 吕峰张晏玮黄平陈志林薛飞王俊
Owner SUZHOU NUCLEAR POWER RES INST
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