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The Fast Simulation of Highly Flexible Flight Dynamics

高度灵活的飞行动力学的快速仿真

基本信息

批准号：
1944318
负责人：
金额：
--
依托单位：
University of Glasgow
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2017
资助国家：
英国
起止时间：
2017 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1944318
关键词：
Fast Simulation Highly Flexible Flight

项目摘要

A combined formulation of the finite element method and computational fluid dynamics could be used to simulate the flight dynamics of highly flexible aircraft, but this would result in a very computationally expensive problem which may require many hours to solve even with high performance computing resources. The purpose of the proposed project is to reduce the computational cost of the analysis of combined flight dynamics and aeroelastics for highly flexible aircraft through the use of alternative, lower order methods. The project would initially involve investigation into the state of the art low order structural dynamics and fluid dynamics methods. Based on the outcome of the literature review, methods would be chosen to investigate, extend and implement within a computer code. The code will then be verified, most probably using data collected from a highly flexible model aircraft built by a team at the Institute of Aeronautical Technology in Brazil. It is likely that the code may become complex due to the need to be able to model a full model in comparison to a "toy" case. Once verified, the code will be compared to current methods. The code will also be used to investigate design and control problems. For example, the coupling of large elastic deformations between different parts of an aircraft or stability control methods for flexible aircraft. The motivation for this project is the need to increase aircraft efficiency. In order to do this, lighter airframes and higher aspect ratios must be used. In order for traditional flight dynamics laws to be used, the airframe must be stiff enough that the frequencies of the aeroelastics and the flight dynamics are dissimilar. By removing this stiffness constraint, more efficient aircraft may be designed at the cost of extensive consideration of the coupling between aeroelastics and flight dynamics. Analysing this is currently challenging, and is therefore a constraint the industry's ability to improve aircraft efficiency.

有限元法和计算流体动力学的组合公式可用于模拟高度柔性的飞行器的飞行动力学，但这将导致计算上非常昂贵的问题，即使使用高性能的计算资源也可能需要许多小时来解决。建议项目的目的是通过使用替代的低阶方法来降低高柔性飞机的综合飞行动力学和气动弹性分析的计算成本。该项目最初将涉及调查最先进的低阶结构动力学和流体动力学方法。根据文献综述的结果，将选择方法来研究，扩展和实施计算机代码。然后将对代码进行验证，最有可能使用的数据来自巴西航空技术研究所的一个团队制造的高度灵活的模型飞机。由于需要能够对完整模型进行建模，而不是对“玩具”案例进行建模，因此代码可能会变得复杂。一旦验证，代码将与当前方法进行比较。该代码还将用于调查设计和控制问题。例如，飞机不同部件之间的大弹性变形耦合或柔性飞机的稳定性控制方法。该项目的动机是需要提高飞机的效率。为了做到这一点，必须使用更轻的机身和更高的展弦比。为了使用传统的飞行动力学定律，机体必须具有足够的刚度，使气动弹性频率和飞行动力学频率不同。通过消除这种刚度约束，可以设计出更有效的飞机，但代价是要广泛考虑气动弹性和飞行动力学之间的耦合。分析这一点目前具有挑战性，因此限制了该行业提高飞机效率的能力。