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The Dynamic Performance of Nonlinear Vibration Absorbers

非线性减振器的动态性能

基本信息

批准号：
0084947
负责人：
Steven Shaw
金额：
$ 23.49万
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：
2000
资助国家：
美国
起止时间：
2000-10-01 至 2004-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0084947&HistoricalAwards=false
关键词：
Dynamic Performance Nonlinear Vibration Absorbers

项目摘要

AbstractSteven W. Shaw and Alan G. Haddow, Michigan State UniversityProposal Number 0084947The Dynamic Performance of Nonlinear Vibration AbsorbersThe objective of the proposed work is to gain an improved understanding ofthe dynamic response and performance of systems that utilize multiplevibration absorbers and to distill this knowledge into design guidelines.Of specific interest are centrifugally driven pendulum absorbers that areused for reducing torsional vibrations in rotor applications. Theseabsorbers consist of masses that are suspended from the rotor in such amanner that their motion counteracts the effects of fluctuating torques thatact on the rotor. This study employs both analysis and experimentation ofsuch absorbers. The analysis focuses on mathematical modeling and theapplication of predictive techniques, including perturbation methods andsymmetric dynamic bifurcation theory. The desired performance of absorbersis achieved by proper selection of design parameters that are included inthe formulation. Experimentation is carried out on an existing torsionalvibration facility that allows for control of the mean rotor speed andfluctuating torque components. Specific topics being investigated include:the application of absorbers to reduce vibrations in rotating beams, the useof absorbers for shake reduction, the avoidance of localization in absorbersystems, absorbers for multi-harmonic excitation, and the transientperformance of absorbers. By systematic investigation of nonlinearbehavior, instabilities, and vibration localization, this study offersstrategies for avoiding effects that limit the performance of absorbersystems, and the results are used to provide useful recommendations forimplementation of systems of absorbers in rotating systems.*******************************************************************

建议编号0084947非线性减振器的动态性能建议工作的目的是更好地了解使用多重振动减振器的系统的动态响应和性能，并将这些知识提炼成设计指南。其中特别感兴趣的是离心式摆式减振器，用于在转子应用中减少扭转振动。这些减振器由悬挂在转子上的质量组成，它们的运动抵消了作用在转子上的波动扭矩的影响。这项研究采用了分析和实验相结合的方法。分析的重点是数学建模和预测技术的应用，包括摄动法和对称动态分叉理论。通过适当选择配方中包含的设计参数来实现所需的吸收性能。实验是在现有的扭转振动设备上进行的，该设备允许控制平均转子速度和波动的扭矩分量。正在研究的具体主题包括：减振器在旋转梁中的应用、减振器的使用、避免减振器系统中的局部化、用于多谐激励的减振器以及减振器的瞬变性能。通过对系统的非线性行为、不稳定性和振动局部化的研究，提出了避免影响减振系统性能的策略，并为旋转systems.*******************************************************************减振系统的实施提供了有益的建议