Innovation, Design, and Analysis of Highly Flexible Structures

高柔性结构的创新、设计和分析

• 批准号: 9912482
• 负责人: P. Frank Pai
• 金额: $ 12万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-15 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9912482&HistoricalAwards=false
• 关键词: Innovation; Design; Analysis; Highly; Flexible

Highly Flexible Structures (HFSs) are designed to undergo large displacements without plastic deformation under normal operation conditions. HFSs have been used in many mechanical systems, civil structures, aerospace vehicles, and large space structures to satisfy space limitations, provide special mechanisms, and/or reduce structural weight. However, today's HFSs are very often built by trial and error and full-size testing. The objectives of this project are: (1) to derive and add new geometrically exact structural elements into the nonlinear finite-element code GESA for performing simulation-based design, analysis, and optimization of highly flexible isotropic and composite structures; (2) to derive efficient numerical methods for nonlinear static and dynamic analyses of HFSs; (3) to develop a MATLAB toolbox having graphical input and output for iteration of design, analysis, and dynamic animation; and (4) to perform experiments and establish an adequate database of post-buckling characteristics of HFSs and to derive guidelines for designing HFSs. This work is important for advancing the knowledge of nonlinear statics and dynamics of HFSs and for designing HFSs. This work will solve critical modeling issues, develop accurate modeling techniques for the design and analysis of HFSs, and provide an efficient tool for performing virtual experiments and rapid prototyping of HFSs.

高柔性结构 (HFS) 设计用于在正常操作条件下承受大位移而不会产生塑性变形。 HFS 已用于许多机械系统、土木结构、航空航天器和大空间结构，以满足空间限制、提供特殊机构和/或减轻结构重量。然而，当今的 HFS 通常是通过反复试验和全尺寸测试来构建的。该项目的目标是：（1）导出新的几何精确结构单元并将其添加到非线性有限元代码GESA中，以对高度灵活的各向同性和复合结构进行基于仿真的设计、分析和优化； (2) 导出用于 HFS 非线性静态和动态分析的有效数值方法； (3) 开发具有图形输入和输出的MATLAB工具箱，用于迭代设计、分析和动态动画； (4) 进行实验并建立 HFS 屈曲后特性的适当数据库，并得出 HFS 设计指南。这项工作对于推进 HFS 的非线性静力学和动力学知识以及 HFS 的设计非常重要。这项工作将解决关键的建模问题，开发用于 HFS 设计和分析的精确建模技术，并为执行 HFS 虚拟实验和快速原型设计提供有效的工具。