Theoretical and experimental study of a novel triple-magnet magnetic dynamic vibration absorber with tunable stiffness

Purpose The existing Nonlinear Dynamic Vibration Absorbers (NLDVAs) have the disadvantages of complex structure, high cost, installation space requirements and difficulty in miniaturization. And most NLDVAs not been applied to reality. To address above issues, a novel Triple-magnet Magnetic Absorber (TMDVA) with tunable stiffness, only composed triple cylindrical permanent magnets an acrylic tube, is designed, modeled tested this paper. Design/methodology/approach (1) A TMDVA designed. (2) Theoretical experimental methods. (3) Equivalent dynamics model. Findings It found that adjusting magnet distance can effectively optimize vibration reduction effect under different resonance conditions. When frequency cantilever changes, shows approximately linear relationship which convenient for design optimization TMDVA. Originality/value Both simulation results prove reduce even if strong robustness Given all that, has potential application value passive engineering structures.