Negative Stiffness Composite Plate Design for Vibration Suppression

This study explores the design and analysis of a negative stiffness plate aimed at enhancing vibration suppression. The concept of the negative stiffness plate is illustrated through the implementation of periodic resonators embedded within a host plate, each incorporating a single vibration absorber. These absorbers generate shear forces and efficiently capture vibration energy when excited resonantly. To validate the effectiveness of these negative stiffness composite plates, numerical experiments were conducted. The findings reveal that the damping of the absorber can significantly influence the frequency stopband created by the absorber’s resonance. Notably, damping has a minor but positive effect on broadening the stopband width and reducing the overall vibration response of the host plate. Furthermore, this study highlights the potential application of negative stiffness plates in mitigating elastic waves induced by earthquakes.