A broadband frequency-tunable dynamic absorber for the vibration control of structures

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Komatsuzaki, T.^1 ; Inoue, T.^2 ; Terashima, O.^2

Kanazawa University, Institute of Science and Engineering, Kanazawa, Kakuma-machi, Ishikawa

920-1192, Japan^1

Honda RandD Co. Ltd., Automobile R and D Center, 4630 Shimotakanezawa, Tochigi, Haga-machi, Haga-gun

321-3393, Japan^2

关键词: Broadband frequency;    Control performance;    Excitation frequency;    Excited vibrations;    Magnetorheological elastomers;    Mass spring systems;    Vibration control devices;    Vibration control of structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012167/pdf
DOI  :  10.1088/1742-6596/744/1/012167

来源: IOP

【 摘 要 】

A passive-type dynamic vibration absorber (DVA) is basically a mass-spring system that suppresses the vibration of a structure at a particular frequency. Since the natural frequency of the DVA is usually tuned to a frequency of particular excitation, the DVA is especially effective when the excitation frequency is close to the natural frequency of the structure. Fixing the physical properties of the DVA limits the application to a narrowband, harmonically excited vibration problem. A frequency-tunable DVA that can modulate its stiffness provides adaptability to the vibration control device against non-stationary disturbances. In this paper, we suggest a broadband frequency-tunable DVA whose natural frequency can be extended by 300% to the nominal value using the magnetorheological elastomers (MREs). The frequency adjustability of the proposed absorber is first shown. The real-time vibration control performance of the frequency-tunable absorber for an acoustically excited plate having multiple resonant peaks is then evaluated. Investigations show that the vibration of the structure can be effectively reduced with an improved performance by the DVA in comparison to the conventional passive- type absorber.