Performance evaluation of small-scale modified MR damper under cyclic loading: experimental evaluation

In numerous engineering domains, the magnetorheological damper, a semi-active device for vibration control is employed to generate a damping force with little power demand. This paper presents a novel approach to enhance the seismic and cyclic excitation resistance of MRD by incorporating a 3D-printed accumulator within the chamber. The proposed modified accumulator MRD (AMRD) is then compared to conventional small-scale MRD (CMRD) which already exists. The experiment utilizes the displacement control approach, with fixed displacements of 5 mm and 10 mm. The excitation frequency is varied within the range of 0.1–1 Hz. Higher excitation frequencies in both conventional MRD (CMRD) and modified accumulator MRD (AMRD) resulted in a linear rise in damping force and energy dissipation. The dissipation of energy exhibited a substantial increase when both frequency and displacement were concurrently elevated. In comparison with CMRD, AMRD resulted in a 23.76