Wave Approach in Vibration Analysis and Control of Complex Built-up Distributed Structures

复杂建筑分布式结构振动分析与控制中的波法

• 批准号: 0825761
• 负责人: Carole Mei
• 金额: $ 21万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-15 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0825761&HistoricalAwards=false
• 关键词: Wave; Approach; Vibration; Analysis; Control

The research objective of this award is to develop methods for vibration analysis and control of complex built-up frame structures. There has been an increasing interest in active vibration control due to the increasing demands for mechanical structures to be lighter and faster - lighter and faster structures are more prone to vibrations. The conventional modal vibration approach is greatly challenged when solving complex practical vibration problems due to the increased model uncertainty caused by the increased complexity of structures and the unavoidable spillover problems caused by modal truncation. In this study, a wave centered view of structures is proposed for vibration analysis and control of complex practical built-up structures. This research consists of theoretical analysis, computer simulation, and experimental verification. Deliverables include exact closed form solutions to vibration problems in planar and three-dimensional frame structures; ?active support? and ?active joint? design strategies for absorbing incoming vibration waves or shunting unwanted vibrations to less important structural members; and guidelines for designing complex periodical frame structures from vibration attenuation viewpoint. If successful, the results of this research will provide practical solutions to vibrations in built-up frame structures and bridge a gap between academic research and real solutions to real world problems. The related experience will be brought back to the classroom for teaching and training the next generation of civil and mechanical engineers. A course on ?Wave Approach in Vibration Analysis and Control? will also be developed to reach engineers from local industry. Furthermore, this research allows the direct participation of undergraduate and graduate students. Hence, this research not only develops a cost-effective, convenient, and practical approach in vibration analysis and control of complex built-up structures, but also provides a vehicle for educating a broad spectrum of students and engineers, in the difficulties associated with suppressing vibrations in complex practical structures.

该奖项的研究目标是开发复杂组合框架结构的振动分析和控制方法。由于对机械结构更轻和更快的需求不断增加，因此对主动振动控制的兴趣越来越大-更轻和更快的结构更容易发生振动。由于结构复杂性的增加导致模型不确定性的增加以及模态截断不可避免的溢出问题，使得传统的模态振动方法在求解复杂的实际振动问题时受到很大的挑战。在这项研究中，一个波中心的结构视图提出了复杂的实际组合结构的振动分析和控制。本研究包括理论分析、计算机模拟和实验验证。包括精确封闭形式的解决方案，振动问题的平面和三维框架结构;？积极支持？然后呢？活动关节？设计策略，吸收传入的振动波或分流不必要的振动，以不太重要的结构构件;和准则，设计复杂的周期性框架结构，从振动衰减的观点。如果成功的话，这项研究的结果将为组合框架结构的振动提供实用的解决方案，并弥合学术研究与真实的世界问题的真实的解决方案之间的差距。相关经验将被带回课堂，用于教学和培训下一代土木和机械工程师。一门课程？振动分析与控制中的波动法还将发展到接触当地工业的工程师。 此外，这项研究允许本科生和研究生直接参与。因此，这项研究不仅开发了一个成本效益高，方便，实用的方法在振动分析和控制的复杂组合结构，但也提供了一个车辆，教育广泛的学生和工程师，在与抑制振动的困难，在复杂的实际结构。