纵向二次折叠翼的运动特性研究

Research on the Motion Characteristics of Longitudinal Second Fold Wings

折叠翼是弹药寻求所占空间小的飞行装置结构件,便于发射箱(筒)式贮存、运输,极大地节省了弹药的储运空间,增加了武器系统的运载、作战能力。本文研究了纵向二次折叠翼在展开过程中的气动弹性特性,建立了二次折叠翼在变体过程中的动态方程,计算出折叠翼在变体过程中的广义非定常气动力,并对折叠翼进行气动弹性颤振分析。结果表明,由于大气环境的不确定性,以及导弹飞行速度与折叠翼展开速度的变化,导致折叠翼气动弹性系统出现不稳定的状态;在变体过程中,折叠翼展开过程中的位移幅度以及角自由度变化是确保弹箭飞行稳定的关键因素。

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.