A Novel Locally Resonant Variable-Stiffness Metamaterial for Vibration Attenuation

Key Points

• This research aims to develop a novel variable-stiffness metamaterial that allows for continuous and broad adjustments in stiffness during deformation.
• Designed a new unit configuration for variable-stiffness metamaterials.
• Conducted static analysis and experimental validation of the new configuration's stiffness properties.
• Investigated wave and vibration response characteristics by altering unit arrangements in a one-dimensional chain model.
• The maximum stiffness achieved was 200 times the minimum stiffness.
• Experimental tests confirmed the effectiveness of different arrangements in suppressing elastic wave propagation.
• The proposed metamaterial effectively allowed controlled adjustments of vibration isolation frequency.