Design of dynamic vibration absorber with gear-based metacell and its research on hull vibration reduction
Hull vibration under complex excitation poses great harm.Traditional dynamic vibration absorber(DVA)lacks of universal applicability because of its narrow working band.Based on the adjustable stiffness of gear-based metacell,a new type of semi-active DVA was proposed.Using the mechanical model,the analytical formula for calculating the meta-cell's stiffness was derived.Based on the dynamic model and FEM,the frequency shift characteristics and vibration absorp-tion performance of the gear-based DVA were analyzed.The results show that the DVA has a wide frequency tuning range and a good damping effect.Through the FEM simulation,the influence of the DVA's mass on the damping effect of the ship hull is explored,which can provide a useful reference for the relevant vibration reduction design.
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