大型客机刚弹耦合分析技术研究及验证

doi:10.7527/S1000-6893.2024.30972

Abstract

Abstract:

The difference in the frequency of rigid-body mode and the elastic mode of modern large passenger aircraft is becoming smaller， and the problem of rigid-elastic coupling during maneuvering is becoming increasingly apparent. Traditional flight dynamics simulation with six degrees of freedom cannot simulate this rigid-elastic coupling process， which is unfavorable for the optimization of control laws or the development of flight training simulators. By analyzing the basic motion characteristics of large passenger aircraft， we use the mean axis system method to extend the traditional flight dynamics equation， and construct a rigid-elastic coupling flight dynamics simulation model for large passenger aircraft， significantly simplifying the analysis process while inheriting the original simulation system. Meanwhile， the rigid-elastic coupling simulation model is used to analyze the typical rigid-elastic coupling problem of large passenger aircraft under pitch and roll maneuvers， with comparison with flight test results to verify the accuracy of the model. The model is then adopted to study the rigid-elastic coupling characteristics of large passenger aircraft under typical pitch and roll maneuvers， as well as the impact characteristics of rigid-elastic coupling on dynamic stability and elastic modes.

Key words: rigid-body mode, elastic mode, rigid-elastic coupling, pitch maneuver, roll maneuver, flight test

CLC Number:

V212.12

Kun MAO, Wuxing JING, Shi CHEN, Jun LIU, Dawei WU, Jiangtao SI. Research and verification of rigid-elastic coupling analysis technology for large passenger aircraft[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(12): 130972.

Figures/Tables 18

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类别	网格数量
总体	1 817
升力面	1 757
细长体	30
干扰体	30

序号	振型	频率（归一化）
1	机翼对称垂直一弯	1.00
2	机翼反对称垂直一弯	1.32
3	发动机对称侧向弯曲	1.36
4	发动机反对称侧向弯曲	1.43
5	机身水平一弯	1.82
6	发动机对称俯仰	1.83
7	发动机反对称俯仰	2.20
8	机身垂直一弯	2.31

Research and verification of rigid-elastic coupling analysis technology for large passenger aircraft

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