Dynamic Analysis and Vibration Reduction of Articulated Silicone Gel Column With Varying Geometry

Abstract

Abstract To improve the vibration reduction effect in low-frequency band of dynamic vibration absorber (DVA), a novel type of articulated silicone gel column (SGC) is introduced in the design of the tuned dynamic vibration absorber. The nonlinear variation of frequency of SGC with varying geometry is obtained by both finite element simulation and experiments. The most sensitive mode is located, which has a wider frequency range by varying the geometry. The polynomial fitting is used to describe nonlinear relation between frequency and geometry. By tuning the geometry, the equivalent stiffness and then resonance frequencies can be manipulated to behave as an active vibration absorber. The vibration reduction experiment of SGC vibration absorbers is investigated. It is found that SGC has better vibration reduction effect in the low-frequency band. The experimental results in the current design demonstrate that the vibration reduction effect can reach 94.03% when tuning SGC to the first-order main resonance. The dimensions and material parameters of SGC should be altered for the specific frequency range and vibration strength.