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| 基于CFD/CSD耦合的飞机阵风动响应机理研究 |
| Research on Dynamic Response Mechanism of Aircraft Gust Based on CFD/CSD Coupling Method |
| 投稿时间：2025-08-16 修订日期：2025-09-22 |
| DOI： |
| 中文关键词: 大展弦比飞机 CFD/CSD耦合 阵风动响应 |
| 英文关键词:high aspect ratio aircraft CFD/CSD coupling gust response |
| 基金项目:中国航空工业集团公司沈阳飞机设计研究所博士创新基金(SBJ004)资助. |
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| 中文摘要: |
| 面向未来航空器结构轻质、大柔度的特点,针对大展弦比飞机在飞行中受到强烈的阵风作用的动响应分析需求,建立了基于6自由度和网格速度法的CFD/CSD耦合的阵风动载荷预示方法。采用网格速度法模拟离散阵风。采用6自由度方程描述飞行器的刚体运动。以大展弦比机翼刚性模型为对象,验证方法的可行性,并应用于飞机的阵风动响应分析,对比研究了刚性模型、弹性模型的响应。研究结果表明：结构弹性振动减小升力、翼根弯矩阵风响应峰值,而刚体俯仰模态在抬头阶段则会导致升力、翼根弯矩增加；阵风响应峰值后,阵风作用逐渐减弱,弹性振动和刚体运动的作用逐渐凸显,未考虑刚体运动的弹性模型最终恢复到无阵风的初始状态,恢复过程相比于刚体模型缓慢,考虑刚体运动的弹性模型的刚体运动、结构振动和气动参数响应与非定常气动力、稳定性和弹性结构特性密切相关。 |
| 英文摘要: |
| Aiming at the characteristics of light weight and great flexibility of aircraft structure in the future, according to the strong gust response of aircraft in flight, a new gust load prediction method based on CFD/CSD coupling method is proposed. The rigid body motion of the aircraft is described by the 6 degrees of freedom equation. Based on the rigid model of wing with large aspect ratio, the feasibility of the method is verified and applied to the analysis of gust response. The responses of rigid model and elastic model are compared. The results show that: The elastic vibration of the structure reduces the peak of the wind response of the lift and the wing root moment, while the elevation mode of the rigid body will lead to the increase of the lift and the wing root moment. After the peak of gust response, the action of gust gradually decreases, and the action of elastic vibration and rigid body motion becomes more prominent. The elastic model without considering the motion of rigid body finally returns to the initial state without gust. The recovery process is slower than that of rigid body model. The rigid body motion, structural vibration and aerodynamic response of elastic model considering rigid body motion are closely related to unsteady aerodynamic force, stability and elastic structure characteristics. |
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