采用网络综合分析的最优惯容型减振器辨识方法研究  

Identification approach of optimum inerter-based absorbers using network synthesis

作　　者：罗建南 景兴建[2] 姜政 LUO Jian-nan;JING Xing-jian;Jason Z Jiang(Department of Automation Engineering,School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China;Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China;Department of Mechanical Engineering,Faulty of Engineering,The University of Bristol,Bristol BS81QU,UK)

机构地区：[1]上海大学机电工程与自动化学院机械自动化工程系,上海200444 [2]香港理工大学机械工程学系,中国香港999077 [3]布里斯托大学工程学院机械工程系,布里斯托BS81QU

出　　处：《振动工程学报》2020年第6期1208-1215,共8页Journal of Vibration Engineering

摘　　要：提出了一种通过网络综合分析来系统地辨识最优惯容型减振器构型的方法。所采用的惯容器为一种两端式机械元件,其特性为所施加于两端的力与相对加速度成正比,其比例系数定义为惯容量。以悬索桥的悬索为例,建立了可表达各种不同构型的减振器-悬索系统通用模型。分析并提出了不同的量化性能指标以合理、有效地评价由阻尼器、弹簧和惯容器组成的不同构型对悬索的减振特性。考虑到对多元构型辨识的难度,采用网络综合分析方法系统地辨识最优惯容型减振器构型及其结构参数。为满足实际应用中对结构复杂性以及惯容量在物理实现中的要求,新引入了一个七元固定尺寸惯容型减振器构型,进而又提出一种简化方法,以获得结构相对简单、且惯容量小的最优构型。所提出的方法不仅可为惯容型软索减振器的构型辨识、结构设计及参数优化等提供有益参考,对其他机械系统及土木结构的振动问题也同样适用。This paper is aiming to studying and proposing a systematic methodology for identifying optimum inerter-based absorbers for suppressing cable vibration,based on network synthesis theory.The inerter is defined as a two-port mechanical element with the property that the applied force is proportional to the relative acceleration between its terminals,with the constant of proportionality termed inertance.Firstly,taking stay-cables of bridges as example,ageneric cable-absorber system model is established.Secondly,different performance measures are investigated and proposed to assess and quantify the damping performance of the inerter-based absorbers for different cases.Then by using the network synthesis approach,beneficial absorber layouts containing inerter,damper and spring elements are identified with their parameter values quantified.Furthermore,considering the difficulties in physical implementation for large inertance and meanwhile to reduce the number of elements to the minimum as possible while not compromising the performance gains,a simplification procedure is adopted.The study results can be used for identifying,designing and tuning the inerter-based absorber for suppressing cable vibration.In addition,the proposed approach can be applied to vibration problems of other mechanical and civil structures.

关 键 词：惯容型减振器 网络综合分析 最优构型辨识 悬索 振动抑制 

分 类 号：TU311.3[建筑科学—结构工程] TU352.1