高超声速气动热弹性分析降阶研究  

Reduced-order modeling research for hypersonic aerothermoelastic analysis

作　　者：晏筱璇 韩景龙[3] 马瑞群 YAN Xiao-xuan;HAN Jing-long;MA Rui-qun(Shanghai Aerospace Control Technology Institute,Shanghai 201109,China;Shanghai Key Laboratory of Aerospace Intelli-gent Control Technology,Shanghai 201109,China;State Key Laboratory of Mechanics and Control of Mechanical Structures,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]上海航天控制技术研究所,上海201109 [2]上海市空间智能控制技术重点实验室,上海201109 [3]南京航空航天大学航空学院机械结构力学及控制国家重点实验室,江苏南京210016

出　　处：《振动工程学报》2022年第2期475-486,共12页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(11472133);江苏高校优势学科建设工程基金资助项目。

摘　　要：高超声速气动热弹性分析涉及流场、结构场和热力场间的相互耦合,计算复杂且耗时长。根据分层求解策略提出了一种基于降阶模型的高超声速气动热弹性分析框架。分别采用系统辨识法和本征正交分解法对高超声速气动力和气动热建立降阶模型,并与模态叠加法耦合实现热配平状态下气动热弹性问题的快速计算。以典型高超声速三维机翼为例,预测热结构的颤振动压,并与全阶流⁃固⁃热耦合计算结果对比吻合较好。所提出的气动热弹性分析框架提高了计算效率,而且精度高,可应用于工程分析中。Aerothermoelastic analysis of hypersonic vehicle involves the coupling of fluid field,structural field,and thermal field,and as a result is complicated and time-consuming.In this paper,a hypersonic aerothermoelastic analysis method based on reduced-order models is developed according to the hierarchical solution strategy.The system identification method and the proper orthogo-nal decomposition method are used to establish the reduced-order models of the hypersonic aerodynamic force and aerodynamic heating,respectively.Then,these reduced-order models are combined with the modal superposition method to realize the rapid cal-culation of aerothermoelastic problems under the static aerothermoelastic trim.Taking a typical hypersonic three-dimensional wing as an example,the flutter speed of the thermal structure is predicted,and is in good agreement with the calculation of the full-order fluid-solid-thermal coupling model.The aerothermoelastic analysis framework proposed in this paper is accurate and greatly im-proves the calculation efficiency,which can be applied to the engineering analysis.

关 键 词：气动热弹性 颤振 高超声速 耦合 降阶模型 

分 类 号：V215.3[航空宇航科学与技术—航空宇航推进理论与工程]