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Full-Scale Simulations of Magnetorheological Damper for Implementation of Semi-Actively Structural Control

Published online by Cambridge University Press:  02 August 2018

Y. B. Peng ,
Z. K. Zhang ,
J. G. Yang  and
L. H. Wang
Y. B. Peng*
Affiliation:
State Key Laboratory of Disaster Reduction in Civil Engineering Tongji University Shanghai, China Shanghai Institute of Disaster Prevention and Relief Tongji University Shanghai, China
Z. K. Zhang
Affiliation:
College of Civil Engineering Tongji University Shanghai, China
J. G. Yang
Affiliation:
College of Civil Engineering Tongji University Shanghai, China
L. H. Wang
Affiliation:
School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai, China
*
* Corresponding author (pengyongbo@tongji.edu.cn)
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Abstract

Full-scale simulations of a (Magnetorheological) MR damper are carried out for revealing its hysteretic behaviors associated with implementation of semi-active control using the routine of computational fluid dynamics. By virtue of the structural symmetry of the MR damper, a two-dimensional configuration for finite element simulation is built up. Herschel-Bulkley model is employed to represent the property of the MR fluid, of which the control parameters and their relevances to the input current are addressed. Typical cases involving sinusoidal and irregular displacements, steady and transient currents loaded upon the MR damper are investigated. Numerical investigations reveal that the damper force has a positive correlation with input current, excitation amplitude and excitation frequency. The full-scale simulation is proved to exhibit a sound accuracy through the validation of experimental data. It provides a logical manner revealing the true performance of MR dampers under desirable operating modes in practice, and can be readily integrated with the gain design of the associated semi-actively controlled structure. This progress bypasses the technical challenge inherent in the traditional tests with low-frequency cyclic loadings due to the limitation of experimental setup. Besides, comparative study between two-dimensional and three-dimensional configuration simulations of the MR damper shows that former has a better applicability, which can be carried out on a low-cost platform.

Keywords

MR damperFinite element simulationHysteretic behaviorsComputational fluid dynamicsHerschel-Bulkley modelSemi-active control
Type
Research Article
Information
Journal of Mechanics , Volume 35 , Issue 4 , August 2019 , pp. 549 - 562
Copyright
© The Society of Theoretical and Applied Mechanics 2018 

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