Research on the Nonlinear Structural Dynamic Characteristics of the Rigid Flexible Coupling Folding Wing Model for Aircraft
Abstract
During the working process of the folding wing, there is not only a large-range rigid body motion but also a deformation motion of the flexible components. The problem of the rigid-flexible coupling of the structure is extremely complex. Aiming at this problem, this study proposes a nonlinear dynamic model of the rigid-flexible coupling structure of the folding wing, revealing the coupling effect between the large-range rotational motion and the flexible deformation. The research results show that the dynamic behavior of the system exhibits significant nonlinear characteristics. In the examples of the structural inherent properties and the transverse excitation response, the rigid-flexible coupling nonlinear numerical model has higher solution accuracy compared with the linear numerical model. Furthermore, the influence of the change of the folding angle on the inherent properties and dynamic response of the structure has been explored. Finally, an experimental model of the folding wing is designed and manufactured based on the similarity principle, which further verifies the accuracy of the rigid-flexible coupling dynamic model in solving the dynamic characteristics of the structure. The establishment of the rigid-flexible coupling model of the folding wing provides a theoretical basis for the dynamic characteristic of the folding wing structure.