TY - JOUR
T1 - A smart passive MR damper with a hybrid powering system for impact mitigation
T2 - An experimental study
AU - Jin, S.
AU - Deng, L.
AU - Yang, J.
AU - Sun, S.
AU - Ning, D.
AU - Li, Z.
AU - Du, H.
AU - Li, W. H.
N1 - Funding Information:
The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research is supported by ARC Linkage Grant (LP150100040).
Publisher Copyright:
© The Author(s) 2021.
PY - 2021/8
Y1 - 2021/8
N2 - This paper presents a smart passive MR damper with fast-responsive characteristics for impact mitigation. The hybrid powering system of the MR damper, composed of batteries and self-powering component, enables the damping of the MR damper to be negatively proportional to the impact velocity, which is called rate-dependent softening effect. This effect can keep the damping force as the maximum allowable constant force under different impact speed and thus improve the efficiency of the shock energy mitigation. The structure, prototype and working principle of the new MR damper are presented firstly. Then a vibration platform was used to characterize the dynamic property and the self-powering capability of the new MR damper. The impact mitigation performance of the new MR damper was evaluated using a drop hammer and compared with a passive damper. The comparison results demonstrate that the damping force generated by the new MR damper can be constant over a large range of impact velocity while the passive damper cannot. The special characteristics of the new MR damper can improve its energy dissipation efficiency over a wide range of impact speed and keep occupants and mechanical structures safe.
AB - This paper presents a smart passive MR damper with fast-responsive characteristics for impact mitigation. The hybrid powering system of the MR damper, composed of batteries and self-powering component, enables the damping of the MR damper to be negatively proportional to the impact velocity, which is called rate-dependent softening effect. This effect can keep the damping force as the maximum allowable constant force under different impact speed and thus improve the efficiency of the shock energy mitigation. The structure, prototype and working principle of the new MR damper are presented firstly. Then a vibration platform was used to characterize the dynamic property and the self-powering capability of the new MR damper. The impact mitigation performance of the new MR damper was evaluated using a drop hammer and compared with a passive damper. The comparison results demonstrate that the damping force generated by the new MR damper can be constant over a large range of impact velocity while the passive damper cannot. The special characteristics of the new MR damper can improve its energy dissipation efficiency over a wide range of impact speed and keep occupants and mechanical structures safe.
KW - Impact mitigation
KW - MR damper
KW - hybrid powering system
KW - rate-dependent softening effect
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U2 - 10.1177/1045389X20988085
DO - 10.1177/1045389X20988085
M3 - Article
AN - SCOPUS:85100036395
VL - 32
SP - 1452
EP - 1461
JO - Journal of Intelligent Material Systems and Structures
JF - Journal of Intelligent Material Systems and Structures
SN - 1045-389X
IS - 13
ER -