The effects of porous media selection on the performance of a porous-valve-based magnetorheological (MR) damper are evaluated. Important media parameters affecting the damper performance, i.e. porosity and morphology (shape), are identified using flow analysis. The relationship between the controllable force of the damper and the porous valve characteristics is studied for three types of porous media. Equivalent damping is determined, and damping performance is compared. Effects of piston-valve area ratio on damper performance are also evaluated. A nonlinear hysteretic biviscous model is applied to the damper and the experimental results are compared with predicted results.

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