Open AccessThe Forward Fuselage Rigidity Design Based on Sensitivity Analysis of The Aircraft
Author(s) -
Wang Ming-chun,
Hongwei Zhao,
Xia Hao,
Sumei Sun,
Ruilan Chang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/792/1/012009
Subject(s) - fuselage , rigidity (electromagnetism) , stiffness , structural engineering , sensitivity (control systems) , finite element method , structural rigidity , engineering , electronic engineering
In this paper, structural characteristics of the forward fuselage of an aircraft were analyzed. Loadbearing characteristics of longitudinal members and transverse members of the forward fuselage were summarized. After analysis, longitudinal members were identified as main factors that affected structural deformation. Then, finite element analysis and sensitivity analysis methods were combined to determine accurate stiffness sensitivity parameters of the forward fuselage structure. Through analysis of the displacement sensitivity curve, the law of changes in stiffness of the forward fuselage with changes in sizes of longitudinal members was found out. Design requirements on stiffness of the forward fuselage were well satisfied by controlling parameters on purpose. Then, some experiments were designed to compare calculated displacements of the forward fuselage. Experiment results proved the accuracy of the proposed analysis method, allowing designers to get rid of their experience-based the forward fuselage stiffness design methods and providing a theoretical basis for the forward fuselage stiffness design. The proposed method could also provide some reference for structural design of new or retrofitted planes.