插入式机翼下壁板对接附加弯矩研究

doi:10.7527/S1000-6893.2018.22436

Abstract

Abstract: The butt-joint of inserted wing lower panel butt-joint has the advantages of stable twin shear force transfer and good fatigue performance, but its structure center line changes obviously in the butt-joint area, bringing additional bending moments. To minimize the additional bending moments in the docking area, a method is proposed to optimize the position of the lower wing surface of the central wing relative to the lower wing surface of the outer wing when establishing the aircraft skeleton model. Based on the characteristics of butt-joint structure of insertion wing lower panel, the origin of eccentricity of butt-joint structure and the formation of additional bending moment are expounded; the eccentricity value of butt-joint structure of a certain type A aircraft is calculated, and the distribution of additional bending moment in butt-joint area is calculated and analyzed by the force method. Based on the docking structure of a certain type A aircraft, four groups of models of inserting lower panel docking structure are established, and the position of the lower wing of each group is different from that of the outer wing. The results show that the additional bending moment in the docking area can be reduced by optimizing the relative position of the lower wing surface of the central wing. The additional bending moments of the other two butt-joint forms of the lower panel are described and compared with those of the insertion type. Finally, the paper summarizes the caveats in the design of docking structures for the reduction of the additional bending moments and their adverse effects.

Key words: butt-joint structure, additional bending moment, force method, finite element, eccentric, center line

CLC Number:

V224⁺.1

TANG Ping, LI Xing. Additional bending moment in lower panel butt-joint of inserted wing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(2): 522436-522436.

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Additional bending moment in lower panel butt-joint of inserted wing

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