Reduction of the vibration amplitudes of a harmonically excited sandwich beam with controllable core

被引：15

作者：

Bajkowski, Jacek M. ^{[1
]}

Dyniewicz, Bartlomiej ^{[2
]}

Gebik-Wrona, Maja ^{[3
]}

Bajkowski, Jerzy ^{[4
]}

Bajer, Czeslaw, I ^{[2
]}

机构：

[1] Warsaw Univ Technol, Fac Prod Engn, Narbutta 85, PL-02524 Warsaw, Poland

[2] Polish Acad Sci, Inst Fundamental Technol Res, Pawinskiego 5b, PL-02106 Warsaw, Poland

[3] Inst Aviat, Al Krakowska 110-114, PL-02256 Warsaw, Poland

[4] Polish Air Force Univ, Natl Secur & Logist Fac, Dywizjonu 303 35, PL-08521 Deblin, Poland

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2019年 / 129卷

关键词：

Smart material; Granular structures; Structural control; Semi-active control; Layered beam; VACUUM PACKED PARTICLES; DESIGN; DAMPER;

D O I：

10.1016/j.ymssp.2019.04.024

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

We consider a theoretical analysis and experimental test of a sandwich beam, with a core layer made of controllable material that can change its properties over time. We show that this dynamically excited beam can be sequentially controlled to obtain higher amplitude attenuation and resistance to the amplitude growth in resonant ranges than when the smart beam parameters are constant over time. Numerical simulations were performed to study the possibility of shifting beam vibration frequency towards ranges distant from resonance. An experimental study on a layered beam consisting of two steel bars with a pneumatically controlled core made of pressurized granular material was considered. A simplified control was performed to detune the beam from the resonance frequencies and reduce the vibrations by 30% in simulations and 10% in experiment. (C) 2019 The Author(s). Published by Elsevier Ltd.

引用

页码：54 / 69

页数：16

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