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Acta Aeronautica et Astronautica Sinica ›› 2026, Vol. 47 ›› Issue (3): 232310.doi: 10.7527/S1000-6893.2025.32310

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles    

Hybrid time-dependent reliability analysis of embedded cabin door mechanism

Yi CHEN1, Pan WANG1(), Guijie LI2, Fukang XIN1   

  1. 1.School of Mechanics and Transportation Engineering,Northwestern Polytechnical University,Xi’an 710072,China
    2.School of Mechanics and Aerospace Engineering,Dalian University of Technology,Dalian 116024,China
  • Received:2025-05-27 Revised:2025-06-23 Accepted:2025-08-11 Online:2025-08-19 Published:2025-08-18
  • Contact: Pan WANG E-mail:panwang@nwpu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(52375157)

Abstract:

As a key component of fighter aircraft, the embedded cabin door mechanism has a significant impact on the stealth performance of the fighter’s cabin door. In order to solve the problem of the step difference that may occur in the movement stage of the embedded cabin door mechanism with pre-deformed cabin door in advanced fighter aircraft, this paper analyzes the contact force and aerodynamic load of the embedded cabin door mechanism based on the established rigid-flexible coupling model of the embedded cabin door. On this basis, in order to solve the problem of accuracy reliability analysis of the cabin door mechanism, a time-dependent reliability analysis method based on symbolic misjudgment probability under hybrid uncertainty is proposed, which further improved the reliability analysis efficiency of the cabin door mechanism. First, the formula of the symbolic misjudgment probability is derived. Then, a symbolic misjudgment probability function is established as a learning function to simultaneously update random samples, interval samples, and time nodes. The accuracy and efficiency of the method are verified through a numerical example. Finally, the upper and lower bounds of the time-dependent failure probability of the embedded cabin door mechanism throughout the movement process are calculated using this method, providing a quantitative basis for the safety margin assessment and reliability design optimization of the embedded cabin door mechanism.

Key words: embedded cabin door mechanism, rigid-flexible coupling, symbolic misjudgment, hybrid uncertainties, time-dependent reliability

CLC Number: