项目名称: 高超声速飞行器气动力-热-结构耦合的非线性力学环境预测及建模技术研究
项目编号: No.11202165
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 安效民
作者单位: 西北工业大学
项目金额: 28万元
中文摘要: 高超声速飞行器在飞行过程中面临非线性非定常气动载荷、非定常气动加热与热传导、复合材料结构弹性振动等多物理场相互耦合作用的复杂非线性力学环境,本项目通过发展计算流体动力学(CFD)/计算结构动力学(CSD)/计算热动力学(CTD)的时域耦合求解技术,实现非定常非均匀气动加热温度场、非定常气动力及热环境耦合影响下的复合材料结构非线性响应特性的预测,分析多场耦合机理;并基于该时域耦合模型利用降阶模型技术建立非定常气动载荷、非定常热传导及复合材料动态响应的低阶耦合动力学模型,实现高超声速飞行器在多场耦合作用下的稳定性及动态响应的快速预测与分析,为高超声速飞行器的设计及多学科优化提供理论参考和技术支持。
中文关键词: 高超声速飞行器;CFD/CTD/CSD耦合方法;气动-热-结构耦合问题;非定常气动力;非线性气动热弹性
英文摘要: Unsteady aerodynamic load、unsteady heat transfer and composite structurelibration are highly coupled and nonlinearly interacted with each other in the flight of hypersonic vehicles. Based on the coupled algorithm of computational fluid dynamics (CFD), computational structural dynamics (CSD) and computational thermo dynamics (CTD) in time domain, the unsteady and uniform temperature distribution, nonlinear and unsteady aerodynamic loads, as well composite structure response are analyzed and discussed. And via the reduced order model techniques, the above coupled system is modeled as low order system in order to quickly solve the flight stability and dynamic response of hypersonic vehicles in nonlinear muti-disciplinary coupled mechanic condition, and will provide theory and support technology for hypersonic vehicles design and optimization.
英文关键词: Hypersonic aircraft;CFD/CTD/CSD coupled method;aero-thermal-structure coupeld problem;unsteady aerodynamic;nonlinear aero-thermal-elasticity