Research on the Motion Characteristics of Longitudinal Second Fold Wings

Abstract

Folding wings are flight device structural components that require small space for ammunition seeking, facilitating the storage and transportation of launch boxes (barrels), greatly saving ammunition storage and transportation space, and increasing the delivery and combat capabilities of weapon systems. This article studies the aeroelastic characteristics of longitudinal secondary folding wings during deployment, establishes the dynamic equations of secon-dary folding wings during deformation, calculates the generalized unsteady aerodynamic forces of folding wings during deformation, and conducts aeroelastic flutter analysis of folding wings. The results indicate that due to the uncertainty of the atmospheric environment and the changes in missile flight speed and folding wing opening speed, the folding wing aeroelastic system exhibits an unstable state. During the deformation process, the displacement amplitude and angular degree of freedom changes during the folding wing unfolding process are key factors to ensure the flight stability of missiles and rockets.

Keywords

• |folding wings|aeroelasticity|multi body dynamics|generalized unsteady aerodynamics|flutter