电流变减振器可控阻尼非线性响应及能量耗散的实验研究

Experimental Studies on Nonlinear Response and Energy Dissipation of Controllable Damping in Electrorheological Damper

对电流变减振器模型在正弦位移信号作用下的阻尼力响应及阻尼耗散能量进行了实验研究。结果表明，电流变流体在电场作用下其阻尼是可控的，当无电场作用时，电流变流体的阻尼是线性粘性阻尼，随着电场强度的增加，其阻尼由线性向非线性转变，属于滞后型阻尼，同时，阻尼耗散能量随之增加。通过对响应的频谱分析发现，其响应的高次谐波的频率均为基频的奇数倍。

In this paper, the damping force response and energy dissipation of an electrorheological were been studied by applying sinusoidal signal.The results show that the electrorheological damping can be controlled by the electric field. As the strength of electric field increased, the damping changed from linear to nonlinear and the dissipative energy increased. By analyzing the frequency spectrum of the response, it was found that the frequencies of harmonics are odd times of the fundamental frequency. As the strength of electric field increased, the shape of the hystersis loop of the energy dissipation changes from elliptical to rhombic, and the damping of electrorheological fluid is hystersis damping. 