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A Determination Method of Aircraft Ground Air Ground Damage

A determination method and technology of open space, applied in the direction of instrument, calculation, electrical and digital data processing, etc., to achieve the effect of simple steps and clear theoretical basis

Active Publication Date: 2019-01-18
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical fatigue analysis cases, there is no proven method for accurately determining ground-air ground damage

Method used

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  • A Determination Method of Aircraft Ground Air Ground Damage
  • A Determination Method of Aircraft Ground Air Ground Damage
  • A Determination Method of Aircraft Ground Air Ground Damage

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Embodiment Construction

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention relates to an aircraft ground-air-ground damage determination method, and belongs to the field of fatigue life tests. The determination method includes the steps: firstly, dispersing a load spectrum curve into a plurality of data points; secondly, determining the relationship between accumulation frequency and stress; thirdly, fitting the exponential equation between the accumulation frequency and the stress; finally, determining the accumulation frequency of a ground-air-ground flight, calculating stress values according to the exponential equation and further determining ground-air-ground damage according to the stress values. The general aircraft ground-air-ground damage determination method is clear in theoretical basis and simple and convenient in step, facilitates automatic calculation by computer programming, can be used for rapidly and accurately determining ground-air-ground cycling damage of key parts of an aircraft, and can be widely applied to determination of ground-air-ground damage of various general aircrafts on the premise of meeting airworthiness certification requirements.

Description

technical field [0001] The invention belongs to the field of fatigue life test, and in particular relates to a method for determining aircraft ground air ground damage. Background technique [0002] General-purpose aircraft is the type with the largest number and models among all types of aircraft, including small aircraft, large turbine and propeller aircraft, etc. According to the requirements of Articles 571 and 572 of Part CCAR23 of Civil Aviation Airworthiness Regulations, general-purpose aircraft should undergo fatigue strength inspection or damage safety strength inspection. [0003] Airworthiness Advisory Bulletin AC23-13A gives the basic method of fatigue strength inspection and load spectrum (including four task segments of gust, maneuvering, taxiing and landing), and proposes that the influence of ground-air-ground damage should be considered. Ground-air-ground damage refers to the damage caused by a load cycle that occurs once in a flight. Taking the root of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG16Z99/00
Inventor 张彦军雷晓欣朱亮宁宇
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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