Design and parameter optimization of a new tunable dynamic vibration absorber

LI Qiang; DONG Guangxu; ZHANG Xinong; LUO Yajun; ZHANG Yahong; XIE Shilin

doi:10.7527/S1000-6893.2018.21721

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2018 , Vol. 39 >Issue 6: 221721 - 221721

DOI: https://doi.org/10.7527/S1000-6893.2018.21721

Solid Mechanics and Vehicle Conceptual Design

Design and parameter optimization of a new tunable dynamic vibration absorber

LI Qiang ,
DONG Guangxu ,
ZHANG Xinong ,
LUO Yajun ,
ZHANG Yahong ,
XIE Shilin

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State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an 710049, China

Received date: 2017-09-06

Revised date: 2018-03-20

Online published: 2018-03-19

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Abstract

To effectively suppress the low-frequency or ultra-low-frequency vibration induced by the disturbances in aerospace equipment, a New tunable Dynamic Vibration Absorber (NDVA) with tuning stiffness is proposed in this paper. The implementation of the NDVA is mainly carried out by connecting a Spiral Flexure Spring (SFS) and a Magnetic Negative Stiffness Spring (MNSS). As the proposed NDVA is applied to suppression of resonance, the steady-state frequency response equations and the stability criterion under harmonic force are derived with the averaging method. Based on stability analysis, a new optimization method is offered to attain the optimal parameters with simple iteration. Robustness of the NDVA is analyzed. The results show that besides attenuating vibration in a large low-frequency range, the proposed NDVA can achieve better vibration reduction effect than the linear absorber due to its advantage of robustness in practical application.

Key words： dynamic absorber; negative stiffness; nonlinearity; saddle-node bifurcation; robustness

Cite this article

LI Qiang , DONG Guangxu , ZHANG Xinong , LUO Yajun , ZHANG Yahong , XIE Shilin . Design and parameter optimization of a new tunable dynamic vibration absorber[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018 , 39(6) : 221721 -221721 . DOI: 10.7527/S1000-6893.2018.21721

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