以未来可重复使用的吸气式高超声速飞行器冲压发动机为背景，鉴于冲压发动机内流道中薄壁结构面临的复杂环境和突出的流固耦合问题，以理论分析、数值模拟和风洞实验研究相结合，建立一套描述和研究冲压发动机内流道薄壁结构流固耦合及其影响的研究框架和体系；重点揭示两个关键科学问题：（1）冲压发动机内流道薄壁结构的流固耦合基本性质和特点；（2）内流道薄壁结构流固耦合对内部流场、燃烧性能的影响机理；通过这些科学问题研究，不仅使得对冲压发动机内流道薄壁结构的流固耦合行为的理解达到一个新的高度，同时通过第二个科学问题研究成果，提出并探索利用壁板流固耦合动力学过程提高冲压发动机性能的新方法。本项目的研究目标是以冲压发动机为背景的内流道薄壁结构流固耦合方面研究达到国际领先的高度。本项目的研究工作不仅能够加强对高超声速吸气式发动机内流道薄壁结构流固耦合力学性质的理解，对于促进冲压发动机性能的提升也具有明确的促进作用。

A set of research framework and system is proposed to describe and study the fluid-solid coupling of thin plate in the internal flow of the ramjet due to the complex environment and the prominent fluid-solid coupling of thin plate in the internal flow of the ramjet, under the background of future reusable air-breathing hypersonic vehicles and combining theoretical analysis, computational simulation and wind tunnel experiment. Two key scientific problems are presented: (1) the basic characteristics of the fluid-solid coupling of thin plate in the internal flow. (2) The effect mechanism of the fluid-solid coupling of thin plate on the internal flow and the combustion performance. Through the study on these scientific issues, the understanding of the fluid-solid coupling of thin plate in the internal flow would achieve a new height. At the same time, through studying the research results of the second scientific issue, a new method to improve the ramjet performance is put forward and explored by use of dynamic processes of the panel fluid-solid. The project aims to make the study on the fluid-solid coupling of thin plate in the internal flow of ramjet reach to the international-leading level. The study not only enables us better understand the mechanical characteristics of the fluid-solid coupling of thin plate in the internal flow of the air-breathing hypersonic vehicles, but also plays a positive role to promote the performance of the ramjet.