高超声速飞行器模型弹性特性影响的机理分析

摘要

Elastic effects on aerodynamics and the coupling of the propulsion system is important in hypersonic vehicle modeling.Based on hypersonic vehicle geometry and mechanism analyses,the aerodynamics and the thrust after elasticity of the vehicle and some other parts were computed.Simulations show that the elastic vibration can change flexible modes and the aerodynamic layout,and lower flexible modes play a leading role in affecting the vehicle.The influence of the elastic effects cannot be neglected in air vehicle modeling.%针对高超声速飞行器的弹性效应对气动及推进系统的耦合影响,基于一类高超声速飞行器构型,采用机理分析方法,分析飞行器弹性形变,计算飞行器机身和控制面发生弹性形变后的气动布局及发动机推进系统的推力,研究了弹性效应对气动及推进系统的耦合影响.仿真分析表明:当飞行器机身发生弹性形变时,升力、阻力、俯仰力矩及推力变化明显.低阶弹性模态对飞行器的影响起主导作用,弹性效应的影响在建模中不容忽视.