Granular Damping Analysis and Design for Structural Vibration Suppression

结构振动抑制的颗粒​​阻尼分析与设计

• 批准号: 0324436
• 负责人: Jiong Tang
• 金额: --
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0324436&HistoricalAwards=false
• 关键词: Granular; Damping; Analysis; Design; Structural

The objective of this GOALI project is to develop a systematic methodology for the analysis and design of a vibration suppression technology damping augmentation using granular materials. Such damping mechanism has unique advantage for harsh environment applications.Advanced computational and experimental techniques will be developed to analyze/design granular damping, which include: (a) In order to efficiently and accurately characterize the granular damping mechanisms, a new Molecular Dynamics based simulation which is specifically tailored for granular damping analysis will be developed. (b) In order to further increase the computatuional efficiency and provide an effective analysis/design tool for complicated structures in practical applications, a novel approach will be taken. This approach involves a highly efficient improved Monte Carlo algorithm that can significantly reduce computational cost as compared molecular dynamics simulation. This new method can prevent the occurrence of unrealistically high granular volume density at certain regions and can directly calculate the impact/friction forces that the granules act onto the enclosure/structure. (c) A systematic theory for contact mechanics model identification, computational complexity reduction, and damper-structure interaction analysis will be established. Using these algorithms, we will have the ability to analyze granular damping for arbitrary multi DOF systems under various loading conditions. We will carry out a series of experimental investigations including benchmark case studies on laboratory plate structures and real blade damping analysis to be performed at GE.Granular damping can suppress vibration under extreme temperatures. The outcome of this research will benefit engine and propulsion, aircraft, and space industries. The algorithms developed and knowledge gained can be further utilized in various scientific resear4ch and industrial applications involving granularly analysis. The collaborative nature of this research will allow involved students to understand real-world engineering problems, and will bring industrial perspective to the university. This project will have a long-term impact on education through the planned curriculum development at both undergraduate and graduate levels, as well as in community education programs

该目标项目的目的是开发一种系统的方法，用于使用颗粒材料进行振动抑制技术抑制作用增强。这种阻尼机制对于苛刻的环境应用具有独特的优势。将开发出高的计算和实验技术来分析/设计颗粒状阻尼，其中包括：（a）为了有效而准确地准确地表征颗粒状阻尼机制，一种基于新的分子动力学的模拟，该模拟是针对粒状阻尼分析而开发的。 （b）为了进一步提高计算效率并为实用应用中复杂结构提供有效的分析/设计工具，将采取一种新颖的方法。这种方法涉及高效改进的蒙特卡洛算法，随着比较分子动力学模拟，可以显着降低计算成本。 这种新方法可以防止在某些区域发生不切实际的颗粒量密度，并可以直接计算颗粒作用于封闭/结构的撞击/摩擦力。 （c）将建立一种用于接触力学模型识别，计算复杂性降低和阻尼结构相互作用分析的系统理论。 使用这些算法，我们将有能力在各种加载条件下分析任意多DOF系统的颗粒阻尼。我们将进行一系列实验研究，包括有关实验室板结构的基准案例研究和将在GE上进行的真实叶片阻尼分析。晶状阻尼可以在极端温度下抑制振动。这项研究的结果将使引擎和推进，飞机和太空行业有益。开发的算法和获取的知识可以进一步用于涉及细粒度分析的各种科学研究和工业应用中。这项研究的协作性质将使参与学生能够了解现实世界的工程问题，并将工业视角带给大学。该项目将通过本科和研究生级别的计划课程发展以及社区教育计划对教育产生长期影响