Metamaterial beam with embedded nonlinear vibration absorbers

被引：111

作者：

Casalotti, Arnaldo ^{[1
,3
]}

El-Borgi, Sami ^{[1
,2
]}

Lacarbonara, Walter ^{[3
]}

机构：

[1] Texas A&M Univ Qatar, Mech Engn Program, Engn Bldg,POB 23874, Doha, Qatar

[2] Univ Carthage, Tunisia Polytech Sch, Appl Mech & Syst Res Lab, BP 743, La Marsa 2078, Tunisia

[3] Sapienza Univ Rome, Dept Struct & Geotech Engn, via Eudossiana 18, I-00184 Rome, Italy

来源：

INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS | 2018年 / 98卷

关键词：

Metamaterial beam; Vibration absorbers; Nonlinear vibration damping; Multi-mode control; WAVE-PROPAGATION; PERIODIC-SYSTEMS; NATURAL-MODES; BAND-GAPS;

D O I：

10.1016/j.ijnonlinmec.2017.10.002

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In this work the multi-mode vibration absorption capability of a nonlinear metamaterial beam is investigated. A Euler-Bernoulli beam is coupled to a distributed array of nonlinear spring-mass subsystems acting as local resonators/vibration absorbers. The dynamic behavior of the metamaterial beam is first investigated via the classical approach employed for periodic structures by which the frequency stop bands of the single cell are determined. Subsequently, the frequency response is obtained for the metamaterial beam to study a multi-frequency stop band system by adding an array of embedded nonlinear local resonators. A path following technique coupled with a differential evolutionary optimization algorithm is adopted to obtain the optimal frequency-response curves of the metamaterial beam in the nonlinear regime. The use of the local absorbers, via a proper tuning of their constitutive parameters, allows a significant reduction of the metamaterial beam oscillations associated with the lowest three vibration modes. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：32 / 42

页数：11

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