A Stepwise Optimal Design of a Dynamic Vibration Absorber with Tunable Resonant Frequency

Abstract

A new kind of dynamic vibration absorber (DVA) with tunable resonant frequency is presented. The kinematics differential equation about it is built and the stepwise optimization is performed. Firstly, four main system parameters involving the ratios of mass m, natural frequency f, vibration frequency g and damping z are solved by small-step-search method to obtain optimal steady state amplitude. Secondly, the sizing optimization of the dynamic vibration absorber is proceeded to search an optimal damping effect based on the optimal parameters (g, m, z, f). And such the damping effect is simulated in a flat structure, and the results show that the working frequency band and damping effect of the DVA after optimization won 20 % of the effect of ascension compared with that before optimization.

Keywords

• Dynamic vibration absorber
• Optimal design
• Small step search method
• Damping effect
• Working frequency band.