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Ground sliding vibrating characteristic analyzing method of large airplane

A technology of vibration characteristics and analysis methods, which is applied in the field of vibration characteristics analysis of large-scale aircraft ground rolling, can solve the problems of no analysis methods given, fewer aircraft, etc., and achieve the effect of speeding up the development progress

Active Publication Date: 2019-06-21
中航通飞华南飞机工业有限公司
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Problems solved by technology

At present, more attention is paid to the analysis of the vibration characteristics of the local structure at home and abroad, and there is less analysis of the whole machine, and no systematic analysis method is given.

Method used

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  • Ground sliding vibrating characteristic analyzing method of large airplane
  • Ground sliding vibrating characteristic analyzing method of large airplane
  • Ground sliding vibrating characteristic analyzing method of large airplane

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Embodiment Construction

[0047] Here, the implementation steps will be described in detail through examples, and the example process is shown in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated.

[0048] Such as figure 1 Shown, in the large-scale aircraft ground taxiing vibration characteristic analysis method of the present invention, be used for obtaining large-scale aircraft ground taxiing vibration characteristic, comprise the steps:

[0049] Step 1. Based on the equivalent section stiffness and equivalent section quality of a large aircraft, a simplified single-beam dynamics model is established;

[0050] Step 2. According to the dynamic model in step 1, perform modal analysis on a large aircraft, and extract the first three modal parameters;

[0051] Step 3. According to the first three-order modal parameters in step 2, establish the vibration n...

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Abstract

The invention relates to the technology of analyzing vibrating characteristics of airplanes and in particular relates to a ground sliding vibrating characteristic analyzing method of a large airplane.The method comprises the following steps: determining an arranging position of a sensor according to a modal analyzing result of a large airplane dynamic model; recognizing modal parameters of the large airplane through a GVT test; acquiring data of a ground sliding vibrating sensor and flying parameters of the large airplane through a ground sliding test and carrying out spectral analysis on thedata of the vibrating sensor to acquire a maximum attribution frequency, and determining a maximum frequency type and a generated cause by comprising the maximum attribution frequency with the modalparameters acquired by the GVT test; and determining a vibrating source by combining the flying parameters and improving a related structure according to a analyzing result. By systematically analyzing the ground sliding vibrating characteristics of the large airplane, the cause of vibration can be acquired quickly, thereby providing a ground for researching vibration generated in the sliding process of the airplane effectively, and accelerating the researching progress of the large airplane.

Description

technical field [0001] The invention relates to an aircraft vibration characteristic analysis technology, in particular to a method for analyzing the vibration characteristic of a large aircraft ground roll. Background technique [0002] During the taxiing process of the aircraft taking off and landing on the ground, the vibration of the aircraft during the taxiing process may be caused by the unevenness of the taxiing ground, the impact during landing, the structural asymmetry of the aircraft itself, the unstable operation of the pilot and the braking. . The abnormal vibration of the airframe generated during the ground roll of the aircraft will affect the normal operation of the pilot, and also affect the comfort of the passengers in the cabin, and will cause damage to the airframe structure in severe cases. Therefore, in general, in aircraft design, it is particularly important to analyze the vibration characteristics of the airframe through vibration data and find the v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/60B64F5/00
CPCY02T90/00
Inventor 杨学良曾毅倪磊
Owner 中航通飞华南飞机工业有限公司
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