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Analysis and judgment method for fatigue life of fusion reactor divertor

A fatigue life analysis and fatigue life technology, applied in the field of divertors, can solve problems such as the inability to fully evaluate the response and operating life of divertors

Active Publication Date: 2017-05-10
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

Moreover, it is usually aimed at the evaluation without different load superposition effects or without considering the time accumulation effect, so it is impossible to fully evaluate the response and operating life of the divertor under service conditions

Method used

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  • Analysis and judgment method for fatigue life of fusion reactor divertor
  • Analysis and judgment method for fatigue life of fusion reactor divertor
  • Analysis and judgment method for fatigue life of fusion reactor divertor

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Embodiment Construction

[0019] like figure 1 As shown, the fatigue analysis and evaluation method of the fusion reactor divertor in the embodiment of the present invention includes the following steps:

[0020] Step1: According to the complex loads that the divertor bears in the service environment, the temperature and stress distribution cloud map is obtained by finite element software simulation calculation, so that the temperature and stress time change history corresponding to each position of the divertor can be obtained.

[0021] Step 2: Through the rainflow counting method, the calculated stress-time change history is converted into a series of cycle counting segments.

[0022] Step 3: Using the maximum elastic stress of different parts of the divertor in different counting sections obtained from the above analysis and the corresponding temperature at this position, the stress result of the finite element elastic analysis is converted into a cyclic strain range through the calculation formula....

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Abstract

The present invention discloses an analysis and judgment method for the fatigue life of a fusion reactor divertor. According to the method, firstly, a complex load applied onto a divertor in a service environment is converted into a temperature and stress-time changing course. Secondly, a series of cycle counting sections during an irregular stress course are subjected to the rain-flow counting treatment. Thirdly, for each counting section, an elastic stress range thereof is obtained according to a numerical analysis result. Fourthly, based on a stress-strain analysis formula, the stress result of the finite element elasticity analysis is converted into the total cycle strain range of the above counting section. Fifthly, according to the cycle strain fatigue life curve of materials, different stress levels are subjected to the quantization of the fatigue damage. Sixthly, a fatigue damage value corresponding to each cycle of each counting section during the stress course can be obtained. According to the technical scheme of the invention, a given service environment is subjected to result evaluation. Therefore, related protective measures and maintenance recommendations are provided, or improvement opinions are provided for the design of the divertor. As a result, an obtained evaluation result is more objective and more real for engineering practices.

Description

technical field [0001] The invention relates to the technical field of divertors of nuclear fusion devices, in particular to a fatigue life analysis and evaluation method for divertors of fusion reactors. Background technique [0002] As one of the core internal components of the nuclear fusion device, the divertor's main function is to exclude the high heat flow and particle flow from the plasma. In a fusion reactor, the evaluation of the reliability of the performance of the divertor and its damage or failure in the service environment can provide very important reference information for the safe operation and maintenance of the device. [0003] At present, the research on the performance of the divertor mainly focuses on three aspects: (1) High heat load test experiment. The service performance of the divertor under high thermal load can be effectively obtained through the test of the experimental piece; at the same time, through the analysis of the divertor module after...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21B1/25
CPCG21B1/25Y02E30/10
Inventor 宋云涛钱新元彭学兵陆坤卯鑫
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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