Post Buckling Behavior And Imperfection Sensitivity Of Space Trusses With Multiple Eigenmodes

多本征模态空间桁架的后屈曲行为和缺陷敏感性

• 批准号: 9103227
• 负责人: Ralf Peek
• 金额: $ 11.98万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-05-01 至 1994-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9103227&HistoricalAwards=false
• 关键词: Post; Buckling; Behavior; Imperfection; Sensitivity

The proposed investigation will develop a methodology to determine the worst shape of imperfection for any lattice type structure, as well as a simple relationship between the magnitude of the imperfection and the corresponding drop in a load carrying capacity that is a asymptotically exact for small imperfections. This will be achieved by means of the Lyapunov-Schmidt-Koiter decomposition followed by asymptotic results, as well as by an iterative numerical technique which allows the limit point for the imperfect structure to be traced while changes in the size and/or shape of the imperfection (or other design parameter) are made.

拟议的研究将开发一种方法来确定任何晶格类型结构的最坏缺陷形状，以及缺陷大小和相应的承载能力下降之间的简单关系，对于小缺陷来说，这种关系是渐近精确的。 这将通过 Lyapunov-Schmidt-Koiter 分解和渐近结果以及迭代数值技术来实现，该技术允许在结构尺寸和/或形状发生变化时追踪不完美结构的极限点。存在缺陷（或其他设计参数）。