GOALI: Nonlinear Vibration Absorbers for Multi-Frequency Excitation

GOALI：用于多频励磁的非线性减振器

• 批准号: 1100260
• 负责人: Steven Shaw
• 金额: $ 35万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1100260&HistoricalAwards=false
• 关键词: GOALI; Nonlinear; Vibration; Absorbers; Multi

The goal of this Grant Opportunity for Academic Liaison with Industry (GOALI) project is to investigate dynamic interactions in systems composed of multiple vibration absorbers that are tuned to different frequencies. Most tuned absorber devices are designed to reduce vibrations near a given frequency, typically to suppress the resonance of a troublesome vibration mode. If one uses a set of absorbers tuned to different frequencies, for example, to address multiple vibration modes, nonlinear dynamic interactions between absorbers can occur, causing a significant reduction in the effectiveness of the absorber system. Thus, optimal design of multi-frequency absorber systems requires a fundamental understanding of these interactions, so that they can be avoided. The research program is aimed at developing this knowledge base and implementing it to reduce multi-frequency automotive powertrain torsional vibrations that occur, for example, in engines that employ cylinder deactivation. The approach involves a combination of physical modeling, analysis by perturbation methods and computer simulations, experimental verification, and development of guidelines for meeting performance specifications by selection of absorber system parameters, specifically, tunings and inertias.The results obtained will extend the knowledge base for vibration absorbers to situations with multi-frequency excitations, which will allow for improved effectiveness of absorber systems over a wide range of operating conditions. The university and industrial partners will work in close cooperation to develop absorber systems that will facilitate the implementation of fuel-saving technologies for automotive engines, by allowing them to operate in regimes with high efficiency that are otherwise plagued with vibration problems. The results of the research will be made widely accessible by technical publications and presentations. The research activity will also be described, in the general context of energy conservation technologies, by the university PIs and their graduate students in summer outreach programs geared to middle and high school students.

该项目的目标是研究由多个振动吸收器组成的系统中的动态相互作用，这些振动吸收器被调谐到不同的频率。 大多数调谐吸收器装置被设计成减少给定频率附近的振动，通常抑制令人讨厌的振动模式的共振。 如果使用一组调谐到不同频率的减振器，例如，以解决多个振动模式，则可能发生减振器之间的非线性动态相互作用，导致减振器系统的有效性显著降低。 因此，多频吸振系统的优化设计需要对这些相互作用有基本的了解，以便避免它们。 该研究计划旨在开发此知识库并实施它，以减少多频汽车动力传动系扭转振动，例如，在采用停缸的发动机中发生的扭转振动。 该方法包括物理建模、摄动法分析、计算机模拟、实验验证以及通过选择吸振器系统参数（特别是调谐和惯性）来满足性能规范的指南。所获得的结果将扩展吸振器的知识库，使其适用于多频率激励的情况。这将允许在宽范围的操作条件下提高吸收器系统的效率。 大学和工业合作伙伴将密切合作，开发吸收系统，以促进汽车发动机节油技术的实施，使其能够在高效率的条件下运行，否则会受到振动问题的困扰。 研究结果将通过技术出版物和专题介绍广为传播。 研究活动也将在节能技术的一般背景下，由大学PI及其研究生在面向初中和高中生的夏季推广计划中进行描述。