阵风/翼型干涉响应高效分析方法研究
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- 英文论文题名：A High Efficiency Method for Gust/Aerofoil Aeroelastic response Analysis
- 论文作者：周强 ; 陈刚 ; 李跃明
- 英文论文作者：Zhang Zhou Qiang ; Chen Gang ; Li Yueming ; State Key Laboratory for Strength and Vibration of Mechanical Structures ; Xi'an Jiaotong University ; Shannxi Key Laboratory for Environment and Control of Flight Vehicle ; Xi'an Jiaotong University
- 年：2016
- 作者机构：西安交通大学机械结构强度与振动国家重点实验室;西安交通大学先进飞行器服役环境与控制陕西省重点实验室;
- 论文关键词：阵风响应 ; 计算流体动力学 ; 降阶模型 ; 流固耦合 ; 本征正交分解
- 英文论文关键词：gust response ; computational fluid dynamics ; reduced order model ; fluid/structure coupling ; proper orthogonal decomposition
- 会议召开时间：2016-11-25
- 会议录名称：2016年航空科学与技术全国博士生学术论坛摘要集
- 语种：中文
- 分类号：V211.41
- 学会代码：XBHH
- 会议名称：2016年航空科学与技术全国博士生学术论坛
- 会议地点：中国陕西西安
- 主办单位：西北工业大学研究生院、中国高校航空学院院长联席会
- 学会名称：西北工业大学航空学院
- 页数：2
- 文件大小：571k
- 原文格式：D
- 会议级别：全国
摘要
飞行器在大气中飞行,不可避免地受到阵风的影响。阵风所附加的气动载荷引发飞行器飞行状态的改变,过大幅值的阵风影响飞行的性能与安全。如何快速准确预测阵风所引起的载荷和结构响应对飞行器安全具有重要意义。本文提出了一种高效高精度的气弹系统运动阵风降阶模型,该方法将理论分析模型与数值模型结合建立运动阵风ROM,快速预测运动阵风引起的气弹响应,相比于CFD计算将阵风/翼型干涉响应计算效率提高了3-6个量级。所建立的ROM应用于阵风/翼型干涉响应分析中共振阵风工况的寻找,效率提高了约15000倍。数值结果表明不同工况下阵风ROM都能与CFD结果吻合很好。阵风ROM可以快速寻找到阵风/翼型干涉响应中的共振阵风长度和共振阵风运动速度,发现静止阵风的共振阵风长度等于共振阵风速度乘以该阵风长度。此外所建立的运动阵风ROM可以很准确的模拟大气湍流作用下翼型载荷变化和位移响应。
Aircraft flying in the atmosphere, inevitably affected by the gust. During a gust encounter, the forces and moments acting on the aircraft change rapidly, in turn exciting rigid and flexible dynamic responses of the entire aircraft. How to quickly predict the gust load and structural response have a great significance to the aircraft safety. A high efficiency and high accuracy aeroelastic moving gust ROM based on POD method is proposed. The methodology combines an analytical formulation and a numerical approach to identify, or optimise, the unknown parameters of the analytical formulation, the ROM achieves a consistent speed up of more than 3 order compared to CFD simulation. The ability of the ROM is able to search the worst gust length and worst advance ratio in discrete cases, the efficiency of this searching is speed up about 15000. The ability of the method is able to search the worst gust length and worst advance ratio in discrete cases. A relationship between worst gust length and worst advance ratio is found, that is the worst gust length equal to worst advance ratio multiply by that fixed gust length. In addition, the ROM can accurately predicts the vibration caused by discrete gusts and atmosphere turbulence.
Aircraft flying in the atmosphere, inevitably affected by the gust. During a gust encounter, the forces and moments acting on the aircraft change rapidly, in turn exciting rigid and flexible dynamic responses of the entire aircraft. How to quickly predict the gust load and structural response have a great significance to the aircraft safety. A high efficiency and high accuracy aeroelastic moving gust ROM based on POD method is proposed. The methodology combines an analytical formulation and a numerical approach to identify, or optimise, the unknown parameters of the analytical formulation, the ROM achieves a consistent speed up of more than 3 order compared to CFD simulation. The ability of the ROM is able to search the worst gust length and worst advance ratio in discrete cases, the efficiency of this searching is speed up about 15000. The ability of the method is able to search the worst gust length and worst advance ratio in discrete cases. A relationship between worst gust length and worst advance ratio is found, that is the worst gust length equal to worst advance ratio multiply by that fixed gust length. In addition, the ROM can accurately predicts the vibration caused by discrete gusts and atmosphere turbulence.
引文