MRE阻尼器减振特性的仿真

Study on vibration reduction simulation of MRE damper

为了获得自主设计的MRE阻尼器的减振特性,设计了一款基于挤压工作模式的MRE阻尼器减振实验平台。根据该振动系统的动力学模型,运用Matlab,在磁场强度为0~0.8 T,激振频率为5~45 Hz的条件下,对其进行编程仿真以分析其减振效果。结果表明：该MRE阻尼器可使振动幅值最大降低54.05%,初相位最大偏移量为64.22%,系统固有频率移频量7.07 Hz。该MRE阻尼器可以通过改变其绕组线圈控制电流的大小来改变磁流变弹性体的弹性模量,进而调整整个系统的刚度,具有良好的磁控性能并能对振动进行有效控制。

Magnetorheological elastomer（MRE） emerging as a new kind of intelligent material, has become the focus of widespread attention in many fields of vibration control. This paper is aimed at identifying the vibration damping characteristics of the independently designed MRE damper. The identification is performed by designing a damper damping experiment platform based on the extrusion working mode; and performing the programming simulation using the dynamic model of the vibration system and Matlab to analyze the effect of vibration reduction as in the case of the magnetic field intensity of 0 0.8 T and vibration frequency of 5 ~ 45 Hz. The simulation demonstrates that the MRE damper provides the maximum vibration amplitude reduction （54. 05% ）, the maximum offset of the early phase （64.22%）, and the shift frequency of system natural frequency （ 7.07 Hz）. The MRE damper may exhibit a better magnetic control performance and a more effective vibration control, thanks to its ability to change the elastic modulus of the MRE by changing the control current size in the coil, and thereby to adjust the stiffness of the whole system.