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Method for assessing and prolonging life of canopy

A canopy and cockpit technology, applied in the field of fatigue, can solve problems such as grounding of aircraft, long replacement cycle, and failure to consider the fatigue life of the canopy, and achieve the effect of significant economic benefits, comprehensive process system, and easy understanding and mastery.

Active Publication Date: 2014-08-13
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0002] Canopy and windshield replacement costs are high, and the replacement cycle is long. Once the transparent part of the canopy is replaced, the aircraft will be grounded. Therefore, it is very important to reasonably determine the life of the canopy.
In the past, the life of the canopy was only given through full-scale fatigue tests. There was no safe and effective formulation of the fault tolerance of the canopy in the field to ensure the safety of the canopy. The influence of noise on the fatigue life of the canopy was not considered for the oiled aircraft. At the same time The present invention establishes a set of methods for the fixed life extension of the completed canopy, and forms a canopy fixed life extension system, which can cover all aircraft canopies and the newly developed canopy fixed life extension technology

Method used

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  • Method for assessing and prolonging life of canopy
  • Method for assessing and prolonging life of canopy
  • Method for assessing and prolonging life of canopy

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Embodiment Construction

[0055] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0056] The following is an example of life extension of an aircraft canopy.

[0057] First, determine the typical mission profile and flight parameter data of the canopy

[0058] Investigate and analyze all flight programs and flight profiles during aircraft flight, training, and test flight, and determine the typical mission profile of the canopy through the analysis of all flight programs.

[0059] Analyze the take-off and landing flight parameters of the aircraft, and sort out typical flight parameters, including time, altitude, Mach number, and angle of attack.

[0060] Second, temperature calculation and load calculation for the canopy

[0061] According to the typical flight profile and flight parameter data, the temperature-time history calculation and load-time history calculation are carried out for each flight prof...

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Abstract

The invention belongs to the field of airplane fatigue research and relates to the method for assessing and prolonging life of a transparent part of a canopy. The method is characterized by comprising the following steps of 1, determining a typical task profile and flight data parameters of the canopy; 2, computing a temperature and a load of the canopy; 3, charting a temperature / load spectrum of the canopy; 4, performing a ground heating and loading fatigue test on the canopy; 5, computing exposure time of an external field of the canopy and performing an aging test on the external field of the canopy; 6, performing the ground heating and loading fatigue test continuously after aging; 7, making canopy damage tolerance and inspection detailed rules for the external field; 8, performing sound fatigue life analysis on a refueling airplane; 9, giving out service life of the canopy. The method has the advantages that a life assessment and prolongation system of the canopy is established completely, the whole process and method of the life assessment and prolongation of the canopy is included, using safety of the canopy is ensured, and the method is significant and remarkable in economic benefit.

Description

technical field [0001] The invention belongs to the field of fatigue and relates to a method for determining and extending the life of a canopy. Background technique [0002] Canopy and windshield replacement costs are high, and the replacement cycle is long. Once the transparent part of the canopy is replaced, the aircraft will be grounded. Therefore, it is very important to reasonably determine the life of the canopy. In the past, the life of the canopy was only given through full-scale fatigue tests, and there was no safe and effective formulation of the fault tolerance of the canopy in the field to ensure the safety of the canopy. The impact of noise on the fatigue life of the canopy was not considered for the oiled aircraft. At the same time The invention establishes a set of method for determining the life extension of a completed canopy, forms a system of life extension for a canopy, and can cover all aircraft canopies and newly developed canopy life extension technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
Inventor 陆华王佳莹苏昱逢刘汉海
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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