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Multi-life-piece replacement policy search algorithm which considers structural correlation

A strategy search and correlation technology, applied in computing, special data processing applications, instruments, etc., can solve the problem of not considering the influence of the maintenance cost of the unit where the life parts are located.

Active Publication Date: 2017-11-17
威海哈威资产经营有限责任公司 +3
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Problems solved by technology

The current research believes that no matter which life part is replaced, the fixed maintenance cost is the same, and the impact of the unit where the life part is located on the maintenance cost is not considered

Method used

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  • Multi-life-piece replacement policy search algorithm which considers structural correlation
  • Multi-life-piece replacement policy search algorithm which considers structural correlation
  • Multi-life-piece replacement policy search algorithm which considers structural correlation

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with the accompanying drawings.

[0059] The present invention comprehensively considers the structural correlation and economic correlation between multi-life parts, and proposes a multi-life part replacement strategy search algorithm considering structural correlation, which specifically includes the following contents:

[0060] First, an optimization model for the replacement problem of multi-life parts is established, considering that the total life of the engine is T lim, including the chance replacement problem of p(p≥1) units and n(n≥p) life parts. Denote the fixed maintenance cost of the engine as c b,0 , which is independent of the number of life parts replaced. Denote the kth unit body of the engine as M k (k=1,2···,p), which contains n k lifetime parts, then Its assembly and disassembly cost is c b,k . remember for M k the ith k (i k =1,2···n k ) pieces of life, whose life is l...

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Abstract

The invention relates to the technical field of aero-engine repair, in particular to a multi-life-piece replacement policy search algorithm which considers structural correlation. Based on comprehensive consideration of economic correlation and the structural correlation among aero-engine life pieces, and with making the replacement total cost of the life pieces the lowest in a whole life cycle being an optimizing target, a multi-life-piece opportunity replacement problem optimization model is established; aiming at characteristics of the optimization model, a four-model solution space reduction rule is provided, the search algorithm based on the reduction rule is provided based on the provided rule, and the algorithm can obtain an optimal solution of the model. Finally, through the adoption of a numerical number experiment and an application case, the provided algorithm is evaluated and verified. The result shows that the provided algorithm can achieve precise solution of a small-scale multi-life-piece opportunity replacement problem.

Description

Technical field: [0001] The invention relates to the technical field of aero-engine maintenance, in particular to a search algorithm for replacement strategy of multi-life parts considering structure correlation. Background technique: [0002] Aeroengines are complex equipment with high safety requirements, and the maintenance cost is very high. Among them, the replacement cost of life parts is an important part of the engine maintenance cost. Taking the CFM56-5B engine as an example, the cost of replacing a full set of life parts is about 2.6 million US dollars. Life parts are parts in the engine that have a mandatory life limit. During the operation of the engine, the service life of the life parts is not allowed to exceed its life limit, and must be replaced before reaching the life limit. Due to the differences in the materials, structures, and working conditions of each life part, the life limit of each life part varies greatly. For example, the life of the supercha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G06Q10/04G06Q10/00
CPCG06Q10/04G06Q10/20G16Z99/00
Inventor 付旭云钟诗胜张永健林琳王琳
Owner 威海哈威资产经营有限责任公司
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