考虑空气可压缩特性的膜结构-空气耦合振动机理研究

项目名称： 考虑空气可压缩特性的膜结构-空气耦合振动机理研究

项目编号： No.51508238

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 建筑科学

项目作者： 刘平

作者单位： 江苏科技大学

项目金额： 20万元

中文摘要： 与风场的耦合作用一直是膜结构力学分析中最具挑战性的课题之一，受到国内外专家的广泛关注。目前的研究方法普遍采取了“不可压缩空气”假设。此项假设简化了求解难度，却掩盖了真实的物理作用机制。例如在此假设下，膜结构对空气的作用会瞬间影响全部空气域，而实际上，这种作用与时间密切相关。.本项目作者在已有相关研究成果基础上，进一步开展基于空气可压缩特性的膜-空气耦合振动机理研究。主要内容为：采用量级分析方法探讨并限定不可压缩假设在膜-空气耦合振动问题中的适用范围；联合摄动法与变分原理求解耦合振动方程，阐明膜结构振动时，周边空气的运动状态（随时间的变化规律）；连续开展膜结构静力、模态、风洞试验验证并修正理论结果；通过讨论求解结果并结合具体物理过程，构建可压缩空气下膜-空气耦合作用机理理论。.预期成果将丰富膜-空气耦合振动理论，并能够对大跨空间结构等领域的研究提供新的方法与思路，具有较为重要的科学研究价值。

中文关键词： 膜结构；流固耦合；可压缩空气

英文摘要： Vibration of membrane structure interacted with wind flow is a difficult problem in mechanics analysis of membrane structure, and is also got the extensive attention by experts at home and abroad..The current research methods generally assume air as an incompressible fluid. This assumption simplifies the solving difficulty, but changes the physical mechanism. For instance, under this hypothesis, the influents of membrane structure to the air have affected all the air in a moment; in fact, the effect of membrane structure impacting to the air should be time-effected..Based on the related results, applicant will carry out the principle analysis of FSI on membrane structure vibration coupled with compressive air. This research intends to carry the following contents: using dimensional analysis method to explore and reveal the range of incompressible hypothesis; combined with perturbation method and vibration principle to solve coupled equations, according to simplify the solution results, to reveal the mechanism principle of membrane structure vibration in air fluid..The expected results will enrich the FSI theory of membrane structure and provide new analysis methods to the long-span spatial structures and other fields. It may have important value for scientific research.

英文关键词： membrane structure ;fluid-structure interaction;compressible air