Simulation analysis of vehicle collision based on magnetorheological buffer energy absorption device

doi:10.3969/j.issn.1674-8484.2020.04.008

Abstract

Abstract:

A magnetorheological (MR) absorber was proposed based on the MR fluid, which has advantages of fast response and can be easily controlled to address some problems existing in bumpers, such as low energy absorption efficiency and poor adaptive performance. Considering the influence of the pressure difference inside the MR absorber during the collision, a dynamical model was built, followed by the establishment of the whole vehicle finite element model containing the MR absorber. A crash simulation experiment was carried out adopting LS-DYNA. The results show that the deformation of vehicles with the MR absorber can be reduced by 36% compared with that of conventional bumpers. Meanwhile, the peak acceleration of both sides of the B column as well as the peak impact force present a significantly decreasing tendency. The maximum intrusion of the dash board decreases by 47.3 mm. As a whole, the MR absorber is proved to be effective in reducing damage to members during the crash, thus further improving the passive safety of automobiles.

Key words: passive safety, vehicle crash, magnetorheological (MR) fluid, MR absorber

CLC Number:

TH122

QU Xian, LIN Fanguo, ZHANG Jinlong. Simulation analysis of vehicle collision based on magnetorheological buffer energy absorption device[J]. Journal of Automotive Safety and Energy, 2020, 11(4): 487-492.

Figures/Tables 10

References 14

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