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Maintenance interval evaluation method for aircraft structure damage

A technology for aircraft structure and maintenance interval, applied in the field of performance analysis, can solve the problems affecting the aircraft integrity rate and the maintenance workload of maintenance, etc., and achieve the effect of improving the aircraft integrity rate, reducing the maintenance workload, and saving maintenance costs.

Pending Publication Date: 2022-07-05
中国人民解放军92728部队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the embodiment of the present invention provides a maintenance interval assessment method for aircraft structural damage, to solve the problem that in the prior art, aircraft maintenance intervals are shortened for regular maintenance, resulting in more maintenance workload and impact Aircraft Integrity Questions

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  • Maintenance interval evaluation method for aircraft structure damage
  • Maintenance interval evaluation method for aircraft structure damage
  • Maintenance interval evaluation method for aircraft structure damage

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Embodiment 1

[0044] The embodiment of the present invention provides a maintenance interval assessment method for aircraft structural damage, such as figure 1 shown, including:

[0045] Step S10, setting initial Monte Carlo simulation conditions; the initial simulation conditions include aircraft fleet size, initial use time of each aircraft, aircraft structural maintenance period and aircraft structural failure probability distribution function.

[0046] In this embodiment, the initial simulation conditions are set: the size of the aircraft fleet is n; the initial use time of the i-th aircraft in the fleet is t si , aircraft structure maintenance period T, aircraft structure failure probability distribution function F(t).

[0047] Step S20, compare the initial usage time with the randomly generated failure time.

[0048] In this embodiment, structural damage risk simulation is performed on the i-th aircraft in the fleet. The structural failure probability distribution function F(t) obe...

Embodiment 2

[0076] There are a total of 24 aircraft of a certain type in an airport. Due to the tight development time of this type of aircraft, the fatigue load test of the airframe structure was not carried out in the early stage of development, resulting in frequent structural damage to the current fleet. In order to accurately assess the risk of structural damage to the fleet and formulate a reasonable maintenance interval, this paper takes the fleet as an example and combines the historical structural damage data of the fleet to carry out a risk analysis to verify the risk assessment of the maintenance interval for aircraft structural damage proposed in this paper. method.

[0077] According to the airframe structure crack records found in the maintenance inspection of the aircraft group in recent years, it is found that the structural cracks of the aircraft group are mainly concentrated on the wing structure, so the wing structure is selected as the risk assessment object of this pap...

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Abstract

The invention discloses a maintenance interval evaluation method for aircraft structure damage. The method comprises the following steps: setting Monte Carlo initial simulation conditions; comparing the initial use time with the randomly generated fault time; if the initial time is less than or equal to the fault time, recording the risk level of the structure crack according to the detection condition of the aircraft structure damage in the previous maintenance inspection and the expansion length of the crack; calculating the risk probabilities of the fleet under different levels of risks according to the obtained fleet structure loss risk level times; if the risk probability is within the preset range, indicating that the currently set maintenance interval meets the requirement; otherwise, adjusting the maintenance interval until the risk probability is within a preset range. A reasonable, economical and reliable maintenance interval is formulated through evaluation to control the structural damage risk within a reasonable range, so that the maintenance workload is effectively reduced, the maintenance cost is saved, and the aircraft perfectness ratio is improved.

Description

technical field [0001] The invention relates to the technical field of performance analysis, in particular to a maintenance interval evaluation method for aircraft structural damage. Background technique [0002] Aircraft maintenance is an effective measure to restore flight performance and reduce flight safety risks. Once the aircraft fails in the air, it will threaten the safety of the aircraft, and even cause serious consequences of aircraft crash. Therefore, even if the aircraft does not fail, after the aircraft has been used for a certain period of time, preventive maintenance should be carried out on the aircraft to reduce the flight risk. At present, the commonly used maintenance method for aircraft is a "regular maintenance" strategy based on the life of the aircraft. However, in order to ensure the safety of the aircraft, the regular maintenance interval is usually set conservatively, which wastes maintenance resources. For some aircraft with inherent defects, reg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/15G06Q10/00G06Q10/06G06F119/02G06F119/04
CPCG06F30/20G06F30/15G06Q10/0635G06Q10/0639G06Q10/20G06F2119/02G06F2119/04Y02P90/30
Inventor 张柱柱毛海涛齐小松于善海周圣林林典雄焦鹏刘军张旸胡文林沈沛刘宇麟
Owner 中国人民解放军92728部队