Inerter-based Metamaterials For Mitigation Of Ultralow-frequency Vibrations

An elastic metamaterial, uniquely incorporating a specially engineered inerter, to effectively address ultra-low frequency vibrations associated with seismic events, providing unparalleled mitigation capabilities.

Seismic dampener manufacturers face market challenges where existing retrofit solutions contribute to complexities in installation, maintenance demands, and reliance on components like buckling-restrained braces that may require frequent replacements. Addressing these issues is crucial for enhancing the efficiency and market competitiveness of seismic dampeners in the retrofit solutions sector.

Our seismic dampener design employs an elastic metamaterial with an inerter, effectively mitigating ultra-low-frequency vibrations associated with seismic events. Overcoming limitations, it reduces material masses, lowers structure weight, ensuring cost-effective development, installation, and long-term maintenance.

• Analytical and numerical analyses were performed to provide clear guidelines for designing elastic metamaterials with ultra-low-frequency band gaps
• Optimal more inert design approach capable of very large inertance and very stiff connections to the base structure
• Inerter-based metamaterial approach helps achieve band gaps at the ultra-low dimensionless frequency
• The efficacy and practicality of this design are proven via numerical studies on two dimensional lattices with embedded inerters

Faisal Jamil, Fei Chen, Bolei Deng, Robert G. Parker, Pai Wang, Inerter-based elastic metamaterials for band gap at extremely low frequency, Extreme Mechanics Letters, Volume 56, 2022, 101847, ISSN 2352-4316, https://doi.org/10.1016/j.eml.2022.101847.

Jonathan Tyler
801-587-0515
jonathan.tyler@utah.edu