Modal Characterization of Additively Manufactured Chiral Structure: Suppression of Its Multiple Responses

In this work, dynamic characterization of a simple cantilever embedded with a chiral lattice is investigated. The complex structure is realized through additive manufacturing technique. The inherent advantage of these lattices is offering a high strength-to-weight ratio. When embedded with vibration suppressing units at the nodes, these lattices aid in alleviating the overall dynamic response of the structure. The base structure is analyzed for its modal behavior by analytical and experimental means. These results are well correlated. This base lattice configuration is embedded with vibration suppression units at node locations in various spatial distribution patterns. All configurations have been subjected to dynamic characterization through experimental modal analysis and evaluated their effectiveness in suppressing the overall modal response. Finally, an optimal spatial distribution pattern is arrived, exhibiting the maximum benefit in terms of overall vibration reduction and with the most negligible weight penalty.