The influence of variable piston structure on the performance of magnetorheological dampers

Magnetorheological dampers (MRD) are widely used in many fields due to their fast response, high adjustability, and excellent vibration reduction performance. As a key component that directly affects the transmission of damping force within MRD, the optimization of the piston structure is of great significance for improving the damping adjustment range. In order to study the influence of piston structure on the damping performance of MRD output, a new type of MRD was designed based on the variable clearance piston structure in this paper. An experimental platform was built to test its performance under an external magnetic field. The damping clearance width D and piston plate length H were studied separately. The results showed that the maximum damping force that the damper with variable piston diameter D could output increased exponentially with the increase of D , while the maximum damping force that the damper with variable piston length H could output increased slowly with the increase of H .