A new structural ER (electrorheological) damper based on the characteristic of controllable force of electrorheological fluid (ERF) is proposed. The positive and negative electrodes of the damper consisted of series of concentric cylinders generate great damping forces. The damper works in a state of hybrid of shearing and flow mode. The damping force is generated when electric field is applied. The Bingham model are used to describe the ERF in the post-yielding regime, the theoretical expressions of damping force are developed based on numerical analysis of several ER dampers. A simple two degree of freedom vibration system is taken as an example to evaluate the vibration attenuation performance of the damper. The system is excited by sinusoidal force with certain frequency and the ER damper replaced the conventional damper. The simulation results of the response of displacement as well as acceleration are illustrated to show the effectiveness and feasibility of the damper in vibration control.
展开▼
