Design and modelling methodology for a new magnetorheological damper featuring a multi-stage circumferential flow mode

Li, Ziyue; Qiu, Tianyu; Tian, Tianyu

doi:10.1007/s10999-022-09607-8

Cited by 4 publications

(4 citation statements)

References 51 publications

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“…It has been proved that the innerto-outer flow channel ratio is greater than 0.65, and the error in using the plate approximation to convert the annular flow channel to a plate model for analysis is less than 1% [21,22]. In addition, combined with different flow modes (shear mode [23,24], flow mode [25], extrusion mode [26,27], and mixed mode [28,29]) and various channel shapes (multi-coil [30][31][32], spiral channel [33,34], curved channel [35,36], multi-parallel channel [37,38], tapered hole-shaped channel [18], bypass channel [39,40]) the flat-plate approximation still can characterize mechanical models well. However, given the conical channel shape of the CFC-MRD structure, the conventional parallel plate model cannot fully capture its flow characteristics.…”

Section: Introductionmentioning

confidence: 99%

Theoretical switch model of novel asymmetric magnetorheological damper for shock and vibration application

Liang,

Fu,

et al. 2023

Smart Mater. Struct.

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This study proposed a novel asymmetric conical flow channel magnetorheological damper (CFC-MRD) for all-terrain vehicles (ATVs) to handle complex excitations with coexisting shocks and vibrations. CFC-MRD produces adjustable damping forces by utilizing magnetically controlled properties and achieves asymmetric force output (moderate compression force and strong extension force) with conical flow channels. This design could effectively absorb and dissipate energy. The paper first illustrates the structure and asymmetric principle of CFC-MRD. Then, the mechanism of asymmetric force generation in a non-parallel flat plate is derived, and utilizes the hydrodynamic theory to derive the pressure difference of Bingham fluid between the non-parallel plates. Considering the coexistence of vibration and shock, the study proposes a theoretical switch model that distinguishes between low and high velocity states based on the Reynolds number. Finally, the validity of the model is verified by experiments, and the results show that the CFC-MRD achieves the desired asymmetric force output. The asymmetric force ratio rises with higher excitation speed and drops with increased drive current. At a speed of 1 m s−1 without any applied current, the maximum asymmetric force reaches 1.21. The small peak error, averaging only 2.57%, between experimental and theoretical results affirms the accuracy of the proposed switch model.

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Section: Introductionmentioning

confidence: 99%

Theoretical switch model of novel asymmetric magnetorheological damper for shock and vibration application

Liang,

Fu,

et al. 2023

Smart Mater. Struct.

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“…Yuan, X. [19] devised a novel MRD combining a multi-stage circumferential flow mode in external valves. Zhang, J.…”

Section: Introductionmentioning

confidence: 99%

Quasi-Static Modelling of a Full-Channel Effective Magnetorheological Damper with Trapezoidal Magnetic Rings

Wu,

Hu,

et al. 2023

Materials

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Magnetorheological damper (MRD) has been successfully applied to vehicle suspension systems as an intelligent core component. Most conventional MRDs have closed rectangle-shaped magnetic circuits, resulting in a short effective working length and negligible damping force. To address the above issues, a novel full-channel effective MRD with trapezoidal magnetic rings (FEMRD_TMR) is proposed. The trapezoidal magnetic ring can shunt the magnetic circuit, distributing it evenly along the damping channel and increasing the effective working length. Additionally, which has the same variation trend as the magnetic flux through it, makes the magnetic induction intensity distribution more uniform to reduce the magnetic saturation problem. Theoretically analyzing the damping characteristics of the FEMRD_TMR, a quasi-static model is developed to forecast the output damping force. The structural design of MRD is challenging since conventional quasi-static models rely on the yield stress of magnetorheological fluid (MRF) to reflect the rheological property, which cannot be directly observed and is challenging to calculate. The Takagi–Sugeno (T–S) fuzzy neural network and a unique magnetic circuit computation are offered as a novel quasi-static modeling approach to address the issue. The MRF’s yield stress is linearized into magnetic induction intensity functions by the T–S fuzzy neural network and then converted into the MRD’s structural size by the special magnetic circuit calculation. Therefore, the proposed quasi-static model can directly reflect the relationship between the damping force and structure size, simplifying MRD’s structure design. The novel quasi-static model is shown to be more straightforward and understandable than the conventional Bingham quasi-static model and to have approximately accurate damping force prediction when compared to experimental data.

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“…Additionally, to ensure good rheological properties of the MR fluid and avoid channel blockage, the clearance of the damping channel is designed as 1.2 mm, and the specific dimensions of the damper are given in Table 1. Its quasi-static mechanical model is studied [33,34]. According to the force balance conditions, the valve and floating valve are selected for force balance analysis Additionally, to ensure good rheological properties of the MR fluid and avoid channel blockage, the clearance of the damping channel is designed as 1.2 mm, and the specific dimensions of the damper are given in Table 1.…”

Section: Introduction the Gas-compensated Single-rod Mrdmentioning

confidence: 99%

“…According to the force balance conditions, the valve and floating valve are selected for force balance analysis Additionally, to ensure good rheological properties of the MR fluid and avoid channel blockage, the clearance of the damping channel is designed as 1.2 mm, and the specific dimensions of the damper are given in Table 1. Its quasi-static mechanical model is studied [33,34]. According to the force balance conditions, the valve and floating valve are selected for force balance analysis respectively, and neglecting the friction between the components, the mechanical expression of this type of damper can be obtained as in Equation (1).…”

Section: Introduction the Gas-compensated Single-rod Mrdmentioning

confidence: 99%

Multi-Physics Simulation and Experimental Verification of Magnetorheological Damper with Additional Stiffness

Liang

Wang

et al. 2023

Actuators

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Single-rod magneto-rheological dampers (MRD) have the advantages of a simple mechanism, high reliability, and broad application range. They are widely used in various semi-active vibration control fields. However, their working mode requires a compensating mechanism to perform volume compensation on the rod, leading to additional stiffness for the system. Ignoring this point makes it tough to establish an accurate mechanical model to describe its performance in the design stage, affecting its application. To address this issue, this study proposes a multi-physics simulation model based on gas compensation for single-rod MRD to characterize their mechanical performance accurately. Firstly, the mechanism and mechanical model of the single-rod gas compensation MRD are introduced. Secondly, considering that its performance is affected by the coupling effect of multiple physical fields, including magnetic, flow, and solid mechanics fields, the control equations and boundary conditions of each field are analyzed separately, and a multi-physics coupling simulation model is established by COMSOL. In particular, the gas compensation unit is considered in the multi-physics simulation model. The effect of the compensating mechanism on the mechanical performance of the damper under different excitation speeds, currents, and initial pressures is analyzed. Finally, the accuracy of the proposed method is verified through the demonstration power test. The results show that the simulation can describe the additional stiffness in the damper. The average error between experimental value and simulation value is 7%. This demonstrates the degree of agreement between the experiment and simulation.

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Design and modelling methodology for a new magnetorheological damper featuring a multi-stage circumferential flow mode

Cited by 4 publications

References 51 publications

Theoretical switch model of novel asymmetric magnetorheological damper for shock and vibration application

Theoretical switch model of novel asymmetric magnetorheological damper for shock and vibration application

Quasi-Static Modelling of a Full-Channel Effective Magnetorheological Damper with Trapezoidal Magnetic Rings

Multi-Physics Simulation and Experimental Verification of Magnetorheological Damper with Additional Stiffness

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