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中文摘要：
在对MRD进行力学性能试验研究的基础上，提出一个新的力学模型—双sigmoid模型。该模型的突出优点是考虑了施加电流、激励性质等因素的影响，且参数识别容易、物理概念清晰。在不同激励性质和电流下，该模型与试验结果相比均能较准确地描述MRD低速区的滞回非线性及在高速区的饱和特性。
英文摘要：
Magnetorheological damper （MRD） is a new kind of intelligent actuator for vibration suppression developed recently in the world, which shows an immense potential in the field of engineering structure. The mechanical behavior of MRD are introduced, and a new mechanical model—double-sigmoid is proposed based on the experimental study of MRD. The outstanding feature of the proposed model is a fact that both the magnitude of control current and a wide range of excitation conditions are under consideration. Through this method, the identification of parameters is relatively easy and the physical concept of the model is clear. Under different excitation conditions and control current,the comparsion between the results given by this model and the experimental data shows that via the proposed model ,the phenomena of the hysteresis nonlinear properties in higher velocity region and the saturation characteristic in lower velocity region of MRD can be described accurately.
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