有起落架布置的翼身整体结构机翼载荷测量技术

doi:10.7527/S1000-6893.2023.29525

Abstract

Abstract:

The traditional load calibration constraint method affects the measurement of wing root load on the wing-body integrated structure with landing gear layout. In this paper， a wing load measurement method suitable for this structure is proposed. Firstly， the impact of the change in main landing gear load during ground load calibration on the strain bridge response of the wing root load measurement section is analyzed. An active constraint method is proposed to simulate the actual loading state of the aircraft wing in the air. Secondly， comparative test of wing load calibration is conducted using the active constraint and the traditional landing gear constraint methods. By analyzing the test data， the flight load equations for the two constraint methods are established. The ground checking error of both methods is within 3%， which meets the general requirement for engineering errors. Finally， the symmetrical pull-up maneuver flight test state is selected to verify the effectiveness of the wing load measurement method for the wing-body integrated structure with landing gear layout， and the reason for the large error in load measurement using the traditional landing gear constraint method is also given.

Key words: landing gear layout, wing-body integrated structure, wing root section load, active constraint, load calibration test, flight test

CLC Number:

V217⁺.32

Wenlong LI, Bo WU, Shuai XIE. Technology of wing load measurement for wing-body integrated structure with landing gear layout[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(1): 229525-229525.

Figures/Tables 12

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References 20

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主动约束方法			起落架约束方法
建模误差	验模误差		建模误差	验模误差
2.03	2.51		1.53	2.37

应变电桥编号	起落架约束/（με·kN^-1）	主动约束/（με·kN^-1）	误差/%
G1	7.8	9.6	18.8
G2	9.6	10.8	11.1
G3	9.1	10.4	12.5
G4	-5.7	-5.4	-5.6
G5	-5.2	-6.2	16.1

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Technology of wing load measurement for wing-body integrated structure with landing gear layout

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