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

Jiang, Rilang; Rui, Xiaoting; Yang, Fufeng; Zhu, Wei; Zhu, Hongtao; Jiang, Min

doi:10.1088/1361-665x/ab9e0a

Cited by 10 publications

(2 citation statements)

References 27 publications

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“…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].…”

Section: Introductionmentioning

confidence: 99%

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

Li,

Dong

2023

Preprint

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Scissor-like seat suspensions (SL-SSs) with magnetorheological damper (MRD) has been commonly studied and applied successfully in vehicle vibration isolation. However, in most cases, modeling for scissor-like isolation structure is still inaccurate because of overlook on MRD’s layout. In this paper, effect of geometric nonlinearity by MRD’s installation position on the vibration isolation performance of a SL-SS is investigated. A dynamic parametric model of the SL-SS with six assembly types is derived considering geometric nonlinearity based on Lagrange equation. Then, the parameter analysis is performed to estimate magnetorheological damping function in SL-SS. The displacement transmissibility is solved via harmonic balance method, and its effectiveness is validated with numerical results. Finally, comparative study on displacement transmissibility for six assemble types is carried out, and metrics are introduced to access the isolation capabilities of the SL-SS. The results show that the system in type 3 has wider isolation band than other types. And the results also reveal that for type 1, 3 and 6, a minimum isolation frequency may realize, meanwhile, the maximum peak transmissibility also inevitably occurs; for type 5, increasing horizontal distance between installation points of MRD broadens isolation band, but leads to increment of peak transmissibility.

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Section: Introductionmentioning

confidence: 99%

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

Li,

Dong

2023

Preprint

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“…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.…”

Section: Introductionmentioning

confidence: 99%

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

2022

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To investigate the unsteady flow field generated by magnetorheological (MR) fluid of a high-speed unsteady laminar boundary layer flow in a narrow-long gap of the magnetorheological absorber (MRA), a new unsteady numerical model is proposed. The gap has magnetic-field-activated and inactivated regions, with MR fluid flowing as bi-viscous (non-Newtonian) and Newtonian fluid. The unsteady flow field is described by the unsteady incompressible governing partial differential equation (PDE) and initial-boundary conditions with the moving boundary. The space-time solution domain is discretized using the finite difference method, and the governing PDE is transformed into implicit partial difference equations. The volume flow rate function is constructed to solve numerical solutions of pressure gradient and fluid velocity based on mass conservation, the continuity equation, and the bisection method. The accuracy of unsteady numerical model is validated by the experiment data. The results show that the fluid acceleration profiles along the gap’s height are non-uniform distribution. Further, the volume flow rate and excitation current has a significant impact on the dynamic distribution of fluid velocity profiles, and the moving boundary makes the flow field asymmetric about the central plane. Furthermore, as the transition stress increases, the thickness of the pre-yield region in the activated region increases. There is also a transition flow phenomenon in the activated region as the volume flow rate increases. Finally, the unsteady numerical model has good stability and convergence.

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Numerical Study of Rotary Magnetorheological Seat Suspension on the Impact Protection

Deng

Sun

Christie

et al. 2021

Lecture Notes in Electrical Engineering

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

Cited by 10 publications

References 27 publications

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

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

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

Numerical Study of Rotary Magnetorheological Seat Suspension on the Impact Protection

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