Bouc Wen modified model for MR damper

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Bouc Wen modified model for MR damper

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The Bouc Wen modified model is a widely used approach for characterizing the hysteretic behavior of Magneto-Rheological (MR) dampers in semi-active control systems. This model extends the classical Bouc Wen formulation to better capture the nonlinear dynamics of MR fluids under varying magnetic fields.

The modified Bouc Wen model accounts for the force-velocity and force-displacement characteristics unique to MR dampers, incorporating adjustable parameters to represent the controllable yield stress of the MR fluid. Key features include a smooth transition between pre-yield and post-yield regions, as well as accurate representation of the damper's hysteresis loops under different excitation frequencies and amplitudes.

Compared to the original Bouc Wen model, the modified version introduces additional terms to improve fidelity in predicting the damper's response, particularly in low-velocity regions where MR fluids exhibit complex viscoelastic-plastic behavior. This makes it particularly valuable for applications in structural vibration control, automotive suspensions, and seismic protection systems where precise modeling of MR damper performance is critical.

The model's parameters can be identified through experimental data fitting procedures, enabling customization for specific MR damper designs. This adaptability has made the Bouc Wen modified model a preferred choice for both academic research and industrial applications involving semi-active damping systems.