Robust Aeroelastic Tailoring for Highly Flexible Aerostructures using Composite Material

我提出的项目名为“使用复合材料的高柔性飞机结构的鲁棒气动弹性剪裁”，由Jie Yuan博士监督，目的是开发用于气动弹性分析的鲁棒数值工具。在现代飞机设计中，需要使用数值工具来考虑结构响应于流体流动的动态特性，当还考虑复合材料时，模型可能变得极其复杂。这是一个令人兴奋的研究领域，需要进一步的工作，我的目标是做出贡献。这将通过深入的研究、数值分析、编码和计算实验来实现。将解决的主要挑战是开发工具，以有效地考虑气动弹性分析中复合材料和非线性带来的结构不确定性。利用这些工具，将进行分析以预测航空航天结构的颤振特性，并研究减轻任何负面响应的方法。一旦一个工具完成，它将有望能够准确预测复合材料制造的柔性航空航天结构，如大展弦比机翼，倾转旋翼系统和发动机风扇叶片系统。该领域有许多领域需要参与，但在开始任何工作之前，将进行广泛的文献综述，以加深我对颤振建模的了解和该领域最新的研究。一旦获得了自信的理解，并深入了解了最现代的研究方向，数字工具的开发将开始。与我以前的项目工作中所采用的方法类似，这些工具将基于为描述特定飞机结构而构建的数学模型的集成，采用拉格朗日能量方程和空气动力特性方程。首先，将考虑建立一个基础，但一旦建立了信心和坚定的方法，将调查和模拟更高的自由度。处理非线性是项目中的一个关键因素，极限环振荡将有助于。量化复合材料中不确定性的影响是该工具必须发挥的另一个重要作用，其中需要对材料进行复杂的建模和理解。实施国家的最先进的数值求解器与随机多项式混沌扩展（PCE）模型来处理不确定性是一种可能性。最后，如果需要，将进行FEA和CFD实验，以支持从构造工具获得的结果或与它们合作。希望通过这项工作，为大学未来的研究人员继续和进一步扩展奠定基础，同时开发符合行业标准的工具。

The project I am proposing is titled 'Robust Aeroelastic Tailoring for Highly Flexible Aerostructures using Composite Material 'under the supervision of Dr Jie Yuan, with the aim of developing robust numerical tools for aeroelastic analysis. In modern aircraft design numerical tools are required to consider the dynamic characteristics of structures in response to fluid flows and when composite materials are also taken into account the models can become extremely complex. It is an exciting area of research, where further work is required that I aim to contribute to. This will be achieved through in-depth research, numerical analysis, coding, and computational experimentation.The main challenge that will be tackled is development of tools to effectively consider structural uncertainties that come with composite materials and nonlinearities in aeroelastic analysis. With these tools' analysis will be performed to predict the flutter characteristics of aerospace structures and methods of mitigating any negative response will be investigated. Once a tool is completed it will hopefully be capable of accurate predictions in composite-made flexible aerospace structures such as high aspect ratio wings, tiltrotor systems and fan blade systems in engines.There are many areas of the field to engage with, but before starting any work an extensive literature review will take place to deepen my knowledge of flutter modelling and the most up to date research in the area. Once a confident understanding is achieved and an in-depth knowledge of the direction the most contemporary research is heading is reached, the development of numerical tools will start. Similar to the methods carried out in my previous project work, the tools will be based around integration of mathematical models constructed to describe specific aircraft structures, employing Lagrange's energy equations and characteristic equations of aerodynamic behaviour. At first, low degrees of freedom will be considered to set up a base, but once confidence and a firm methodology has been built, higher degrees of freedom will be investigated and modelled. Dealing with nonlinearities is a key factor in the project that Limit Cycle Oscillations will aid with. Quantifying the effects of uncertainties in composite materials is another important role the tools must play, where complex modelling and understanding of materials will be required. Implementing state of the art numerical solvers with stochastic polynomial chaos expansion (PCE) models to handle uncertainties is a possibility. Finally, if required, FEA and CFD experimentation will take place, either to support results obtained form the constructed tools or collaborate with them. Hopefully through this work groundwork will be set for future researchers at the University to continue and expand further, while also developing tools that are to an industry standard.