Vibration attenuation in tapered metabeams: Influence of conicity and lattice arrangement on elastic wave dispersion

Sahana, Subhadeep; Singh, Amanpreet; Dwivedi, Ankur; Bhattacharya, Bishakh

Abstract

The transmission characteristics of periodic structural elements have long intrigued researchers due to their critical applications in vibration isolation. Understanding the influence of geometric properties on achieving wide attenuation band gaps while maintaining minimal structural mass remains a key research focus. This study proposes a periodic tapered non-prismatic beam with an integrated resonator system, demonstrating exceptional vibration attenuation capabilities while maintaining lower mass. The concept of the proposed structure lies in changing the distribution of mass so as to enhance the vibration characteristics. Four different metabeams have been investigated which have different order of conicity (prismatic, linear, quadratic and cubic). The proposed structures are analyzed using the finite element method, and spectral element method, and is validated with numerical simulations. A remarkable variation of 627.61% is observed in cubic tapered compared to the prismatic beam, which shows the higher attenuation capabilities of tapered metabeams. The change in the bandwidth for different cross-sections and at various conicity values has also been discussed, which shows the wide design range for such metabeams. This work provides new insights into the relationship between geometry and vibrational characteristics, paving the way for lightweight, efficient structures with wide-ranging applications in aerospace, automotive, and transportation systems.

Citation

Sahana, S., Singh, A., Dwivedi, A., & Bhattacharya, B. (2025). Vibration attenuation in tapered metabeams: Influence of conicity and lattice arrangement on elastic wave dispersion. Engineering Structures, 342, Article 120886. https://doi.org/10.1016/j.engstruct.2025.120886

• Journal Article Type: Article
• Acceptance Date: Jun 27, 2025
• Online Publication Date: Jul 14, 2025
• Publication Date: Nov 1, 2025
• Deposit Date: Jul 23, 2025
• Publicly Available Date: Jul 23, 2025
• Journal: Engineering Structures
• Print ISSN: 0141-0296
• Electronic ISSN: 1873-7323
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 342
• Article Number: 120886
• DOI: https://doi.org/10.1016/j.engstruct.2025.120886
• Public URL: https://durham-repository.worktribe.com/output/4273720