Definite life extension method of key structural elements of in-service mechanical equipment under fatigue load

A technology of structural elements and fatigue loads, applied in the field of fatigue, can solve the problems of high test cost, low reliability, and lack of complete methods, etc., achieve significant economic and social benefits, improve calculation accuracy, and reduce fatigue test time and cost Effect

CN111027208BActive Publication Date: 2022-02-01CHINA AERO POLYTECH ESTAB
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-02-01

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Abstract

The invention provides a method for determining life extension of key structural elements of in-service mechanical equipment under the action of fatigue load. The method splits complex mechanical equipment into independent structural elements, and analyzes the history of key structural elements by determining the key structural elements of mechanical equipment. Use conditions, determine the main failure parts of key structural elements and their fatigue loading conditions, carry out damage detection and evaluation of structural elements and mechanical performance tests of materials, and use different evaluation models for different damage characteristics to evaluate the remaining life, so as to realize the The definite life extension of key structural components of mechanical equipment achieves the purpose of providing data support for the definite life extension of mechanical equipment; this method realizes definite life extension based on the damage status of key structural components and the fatigue potential of its materials, which can greatly reduce the fatigue test time and cost, and improve This ensures the accuracy of life-defining and prolonging results.
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Description

technical field

[0001] The invention belongs to the technical field of fatigue, and relates to a life extension method under the fatigue load of key structural elements of in-service mechanical equipment. Background technique

[0002] Modern high-tech complex mechanical equipment, especially weaponry, often consists of hundreds or even thousands of parts. Due to the many functional systems and strong correlations of mechanical equipment, the work of determining and prolonging the life of mechanical equipment is a huge engineering system. For higher reasons, it is more difficult to determine and prolong life. At present, some equipment in our country has reached the design life one after another. Since these equipment are generally conservative in the design stage, they still have great life potential, so there is an urgent need for a suitable life extension method. However, the current domestic methods to determine or extend the life of mechanical equipment mainly include ...

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Embodiment Construction

[0055] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0056] The embodiment of the present invention aims at the outer shell of the in-service mechanical equipment, and proposes a method for determining the life extension of the key structural elements of the in-service mechanical equipment under the fatigue load. The implementation process of the method is as follows figure 1 As shown, it includes the following steps:

[0057] S1. Analyze the structural elements according to the structural characteristics of the mechanical equipment, and select the key structural elements as the life extension objects;

[0058] S2. Collect the field use data of the mechanical equipment or collect the field use data of the same type of equipment, and determine the historical service life of the key structural elements N 0 ;

[0059] S3. Determine the fatigue loading conditions of the key structural elements;

[0060] S4. Dismantling the...