Aircraft wheel vibration analysis method based on finite elements

A vibration analysis, finite element technology, applied in computer-aided design, special data processing applications, instruments, etc., can solve problems such as affecting braking efficiency, destroying structural strength, affecting passenger comfort, etc.

Active Publication Date: 2019-09-17
CENT SOUTH UNIV
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  • Application Information

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Problems solved by technology

If the excitation frequency of these exciting forces coincides with a certain natural frequency of the wheel, resonance will occur, which will cause some structures on the wheel to generate a large resonant vibration load, which will affect the comfort of passengers and seriously It will even destroy the structural strength and affect the braking efficiency

Method used

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  • Aircraft wheel vibration analysis method based on finite elements
  • Aircraft wheel vibration analysis method based on finite elements
  • Aircraft wheel vibration analysis method based on finite elements

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Experimental program
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Effect test

Embodiment Construction

[0087] 1. Establishment of finite element model of aircraft wheel assembly

[0088] 1.1 Establishment of CATIA 3D solid model

[0089] 1- Based on the design drawings of a certain type of aircraft wheel, the actual 3D solid model of the aircraft wheel is obtained through CATIA software. See the wheel assembly Figure 6 (1-wheel hub; 2-movable rim), brake device see 7 (1-housing; 2-cylinder seat; 3-pressure disc; 4-pressure bearing disc; 5-static disc; 6-moving disc ), the simplified model is obtained by removing tiny components.

[0090] 1.2 Finite element model establishment

[0091] Import the obtained simplified solid model into the Hypermesh finite element software for meshing, and then use the software to perform 2D meshing on all structural surfaces. After completing the 2D meshing, first perform quality inspection to obtain structural meshes that meet the accuracy requirements , so as to establish a finite element model, such as Figure 8 shown.

[0092] 2 Contact ...

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Abstract

The invention provides an aircraft wheel vibration analysis method based on finite elements. The method is used for analyzing vibration characteristics of an aircraft wheel. The method comprises the following steps: 1, establishing an airplane wheel geometric model, and importing airplane wheel geometric model to software to establish a finite element model; 2, establishing a contact model of each assembly part of the airplane wheel; 3, setting material parameters of each part of the airplane wheel; 4, calculating a wheel static lateral load, an inflation load, a bearing supporting force and a piston applied pressure; 5, carrying out modal analysis on the airplane wheel under prestress; 6, importing the modal analysis result into a harmonic response analysis module; carrying out harmonic response analysis to obtain displacement frequency domain curves, speed frequency domain curves and acceleration frequency domain curves of the airplane wheel and components thereof, analyzing vibration types through the frequency curves, and judging frequencies of three main vibration modes of flutter, howling and vortex motion to obtain vibration characteristics of the airplane wheel, so that anti-vibration design and optimization can be conveniently carried out in the later period.

Description

technical field [0001] The invention relates to a finite element-based aviation wheel vibration analysis method, which is mainly used for the analysis of the vibration characteristics of the aircraft wheel and has certain value for the anti-vibration design and optimization of the wheel structure. [0002] technical background [0003] Aviation wheels are an important part of aircraft landing gear. During the landing and take-off process of the aircraft, it will be impacted by various loads, resulting in severe vibration. As far as aviation wheels are concerned, the factors that cause various disturbances can be summarized into three categories: one is the random vibration of the wheels caused by the uneven road surface when the aircraft is driving on the ground; rotation; the third is the intermittent excitation caused by the engine running. If the excitation frequency of these exciting forces coincides with a certain natural frequency of the wheel, resonance will occur, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23Y02T90/00
Inventor 刘文胜杨肃马运柱陈梦樵李奇宏
Owner CENT SOUTH UNIV
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