Localization of Vibrations by Structural Irregularity

结构不规则性引起的振动局部化

• 批准号: 8700820
• 负责人: Christophe Pierre
• 金额: $ 15.03万
• 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: 1987
• 资助国家: 美国
• 起止时间: 1987-05-01 至 1990-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8700820&HistoricalAwards=false
• 关键词: Localization; Vibrations; Structural; Irregularity

This research aims to develop the underlying theory and methods for analyzing the effect of irregularities on the dynamics of nearly periodic structures. The research will address two main issues: (1) formulate a general criterion capable of predicting the occurrence of strong localization for structural systems and, therefore, gain a physical insight into mode localization; and, (2) investigate mode localization from two types of nearly periodic structures--namely, assemblies of multi-Degree-of-Freedom (DOF) component systems and one- and two-dimensional multi-span continuous structures--and thereby assess the damaging or beneficial effects of localization for both free and forced responses.

本研究的目的是发展基本的理论和方法， 分析了不规则性对近 周期结构 本研究将解决两个主要问题：（1） 制定一个通用的标准，能够预测的发生 强局部化的结构系统，因此，获得一个 物理洞察模式定位;和，（2）调查模式 来自两种类型的近周期结构的局部化--即， 多自由度（DOF）组件系统和单自由度组件系统的装配 和二维多跨连续结构--从而 评估本地化的有害或有益影响， 和被迫的反应。