Abstract
The primary goal of this paper is to develop a new phenomenological model which is able to accurately describe the nonlinear behaviors of magnetorheological (MR) dampers with fluid deficiency. A multi-channel bypass MR damper with three working modes is tested on the dynamic testing system and the test results are presented for different excitation amplitudes, excitation frequencies, exciting currents, and MR damper working modes. Based on the experimental curves, the void-like phenomenon caused by fluid deficiency is observed and the essence of the phenomenon is deduced. A new phenomenological model is established accordingly, and the influence of model parameters on force-displacement curves and force-velocity curves are analyzed. The model is validated against experimental data, and the comparisons of this model with commonly used MR damper models, including the Bouc-Wen model and Bingham model, are carried out. It is concluded that the proposed phenomenological model has much higher accuracy than the Bouc-Wen model and Bingham model in describing the dynamic characteristics of fluid-deficient MR dampers.
Published Version
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