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A design method of landing gear lock life test

A technology of life test and design method, which is applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc. It can solve the problems of few lock system life tests, lock function failure, and lock reliability cannot be verified.

Active Publication Date: 2016-11-02
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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AI Technical Summary

Problems solved by technology

However, the life test of the lock system is rarely carried out in the previous models, and the reliability of the lock under different conditions cannot be verified.
[0003] The normal work of the lock system is very important, the failure of the lock function will lead to serious accidents, even the plane crash

Method used

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  • A design method of landing gear lock life test
  • A design method of landing gear lock life test
  • A design method of landing gear lock life test

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Experimental program
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Embodiment Construction

[0019] The service life index of a certain type of aircraft is 2000 flight hours / 3000 take-offs and landings, and the first turnaround period is 1000 flight hours. The life test arrangement of the lock system is as follows:

[0020] One, and calculate the total number of cycles for the test:

[0021] The reliability factor is taken as 2.5, and the total number of test cycles is calculated as follows:

[0022] The total number of test cycles = the number of landings × η = 3000 × 2.5 = 7500

[0023] 2. According to the relationship between the number of take-offs and landings and the number of flight hours, determine the relationship between the number of flight hours and the number of test cycles:

[0024] k = 3000 2000 = 1.5

[0025]

[0026] 3. Determine the proportion of high temperature, low temperature and normal temperature test in the life test. The proportional relationship betw...

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Abstract

The invention belongs to the field of aircraft design, and relates to a life test method of a landing gear lock system, which is characterized in that two life calculation methods, flight hours and take-offs and landings, are considered, and test assessment contents of different temperatures are covered. The steps are as follows: first, determine the life index of the lock according to the life index of the number of aircraft landings, and calculate the total number of test cycles; second, establish the relationship between the number of flight hours and the number of test cycles; third, determine the high temperature and low temperature in the life test. , The proportion of normal temperature test, and calculate the corresponding number of cycles; Fourth, determine the test unit cycle. The beneficial effect is that there is a corresponding relationship between the test content and the use in the field, which is convenient for guiding the use in the field and ensures the safety of the system.

Description

technical field [0001] The invention belongs to the field of aircraft design and relates to a method for designing a life test of a landing gear lock. Background technique [0002] Landing gear locks include up locks, down locks, hatch locks and other components, and their function is to ensure that the landing gear and hatches are in the correct position, so as to realize safe takeoff and landing of the aircraft. However, the life test of the lock system is rarely carried out in previous models, and the reliability of the lock under different conditions cannot be verified. [0003] The normal work of the lock system is very important, and the failure of the lock function will lead to serious accidents and even aircraft crashes. Therefore, it is necessary to carry out the life test of the lock to ensure that the lock system is safe and reliable within the aircraft life cycle. At the same time, since the lock system is installed on the fuselage and bears the load of the lan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00
Inventor 周栋杜金柱孟凡星曹莹
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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