Simulation and experiment of the magnetorheological seat suspension with a seated occupant in both shock and vibration occasions

Abstract

The aim of the present work is to develop an magnetorheological (MR) seat suspension for military vehicles to mitigate dynamic responses of seated occupant in both shock and vibration occasions. The main components of the MR seat suspension are tested and modelled. Subsequently, a mathematical model incorporating the MR seat and a seated occupant is established. The vibration and shock simulations based on the established model are carried out, and the results indicate that the proposed MR seat suspension can significantly alleviate the acceleration responses of the seated occupant under vibration input, and simultaneously possess the ability of reducing the spinal injury risk in the presence of severe impact. The systematic experiments of the MR seat prototype with a 50th percentile male hybrid III dummy are conducted, it is found out that the experimental results are in good agreement with the theoretical simulation results, which demonstrates that the developed MR seat suspension is provided with favourable vibration reduction performance and impact resistance.

Geometric nonlinear effect on isolation performance for a scissor-like magnetorheological seat suspension

“…Jiang et al designed a MR seat suspension for military vehicles. The experimental tests showed that it can effectively reduce the human response to shock and vibration [27]. Sun et al introduced a rotary MRD into a seat suspension, which possesses the advantages of less MR fluid and lower cost than that of linear MRD [26].…”

Magnetorheological Fluid of High-Speed Unsteady Flow in a Narrow-Long Gap: An Unsteady Numerical Model and Analysis

“…The field-dependent pressure drop in the activated region can be controlled by adjusting the applied current to change the magnetic field intensity of the activated region, thereby controlling the mechanical properties of the MRA. The MRA has been widely used in vehicle suspension [7,8], landing gear [9,10], and vibration isolation [11,12] research over the last few decades because of its advantages of continuous and adjustable hydraulic resistance, rapid response, and low power consumption. The MR fluid in the gap is a fully developed unsteady laminar flow for the above applications.…”