Open AccessNonlinear Aeroelastic Modeling of a Folding Wing Structure
Author(s) -
Peicheng Li,
Yingge Ni,
Hou Chao-zhen,
Xiaopeng Wan,
Minghua Zhao
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1215/1/012009
Subject(s) - aeroelasticity , hinge , nonlinear system , wing , aerodynamics , folding (dsp implementation) , structural engineering , flutter , stiffness , control theory (sociology) , physics , engineering , computer science , mechanics , control (management) , quantum mechanics , artificial intelligence
The nonlinear aeroelastic response of a folding wing with the hinge free-play nonlinearity is investigated. A nonlinear structural dynamic model is established based on the modal synthesis of free-substructures by modification of the connected relationships, and is unnecessary to re-establish it if the stiffness changes. The nonlinear aeroelastic equation is obtained by rational function approximation of the unsteady aerodynamic force, and solved by Runge-Kutta method to predict the aeroelastic response of the folding wing. The results show that the free-play at hinges changes the aeroelastic characteristic of the folding wing, leading to the occurrence of the limit cycle oscillation within a certain velocity range. Moreover, the sensitivity to the free-play is different for the inboard and outboard hinges. If the free-play is controlled within a certain value, the motion of nonlinear aeroelastic system of the folding wing can be considered linear approximately.