空气动力学学报2024，Vol.42Issue(10)：19-29,11.DOI:10.7638/kqdlxxb-2023.0180
高速飞行器结构/气动/推力耦合动力学建模方法
Dynamic modeling of a hypersonic vehicle with structure,aerodynamic and propulsion coupling
摘要
Abstract
Hypersonic vehicle often uses a propulsion-airframe integrated design,and often has a slender body layout using thin-walled structure and lightweight materials.These factors cause serious coupling effects between propulsion system,aerodynamic force and structural deformation,then lead the ensuing special propulsion-aeroelastic coupling problems.Given these,integrated dynamic modeling and analysis methods were studied.Firstly,dynamic equations were established based on small-perturbation theory of flight dynamics.Then the sub-discipline models with both high accuracy and efficiency were employed,which were aerodynamic model based on local piston theory,structural deformation model based on modal method and quasi-one-dimensional scramjet model.Finally,a dynamic model of air-breathing hypersonic vehicle considering the coupling of propulsion system and structural deformation was established.The dynamic stability analysis of a X-43-liked two-dimensional model is carried out based on the dynamic model.The effects of propulsion and aeroelastic coupling on the dynamic characteristics of the aircraft model are analyzed,and variable parameter analysis of key coupling parameters are conducted.The results validated the feasibility of these dynamic modeling&analysis methods,and demonstrate the special influence of propulsion-aeroelastic coupling on the dynamic characteristics of the example aircraft model.The propulsion coupling can significantly reduce the Phugoid mode stability,the aeroelastic coupling can slightly increase the short period mode stability,and the elevator deflect vibration coupling can significantly reduce the short period mode stability.关键词
高速飞行器/气动弹性/动力学建模/推力耦合/超燃冲压发动机Key words
hypersonic vehicle/aeroelasticity/dynamic modelling/propulsion coupling/scramjet engine分类
航空航天引用本文复制引用
王高瞻,谢长川,刘晨宇,程杰..高速飞行器结构/气动/推力耦合动力学建模方法[J].空气动力学学报,2024,42(10):19-29,11.基金项目
1912项目 （）
