柔性飞行器飞行动力学与结构动力学耦合分析方法

柔性飞行器的刚体运动和弹性变形相互之间存在耦合影响.为实现柔性飞行器的运动和结构内力的耦合求解,利用Lagrange方程推导柔性飞行器的刚体运动弹性变形耦合方程,其中弹性变形部分利用柔性体的弹性模态来描述；通过算例研究柔性对飞行器运动轨迹和姿态的影响以度刚体运动对结构内力的影响,验证了刚体运动方程和结构动力学方程耦合求解的必要性.

The Coupled Flight Dynamic and Structural Dynamic Method for the Flexible Flight Vehicle

There is coupling between rigid-body motion and elastic deformation of a flexible flight vehicle.In order to obtain the coupled solution of the motion and internal forces,coupled equation of rigid dynamics and structural dynamics is developed by using Lagrange equation,in which the elastic deformation is characterized by the structural modes.Some numerical examples are also presented to study the effect of structural flexibility on vehicle trajectory and attitude and the effect of rigid-body motions on structural internal forces as well.These examples finally proves the necessity of coupled solution of rigid dynamic and structural dynamic equations.