All-metal enhanced members with extreme dissipation capacity for vibration suppression of grille structures

Abstract

Marine structures are supposed to simultaneously possess high stiffness bearing high loadings and large damping dissipating dynamic energy. Structural impact protection and stiffening approach is achieved via assembling a pre-compressed negative stiffness component and linear members, which not only exhibits high initial stiffness but also dissipation capacity approaching the theoretical limit under small deformation. The effects of design parameters on the energy dissipation characteristics are investigated by the combination of quasi-static, dynamic and finite element analysis. For potential applications, the dynamic responses and vibration suppression of a representative grille structure optimized by the novel design are studied via FE simulations.

Keywords:

• High stiffness
• impact protection
• pre-compressed negative stiffness component
• dissipation capacity approaching the theoretical limit
• vibration suppression

Declaration of competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Data availability

Data will be made available on request.

Additional information

Funding

This work was supported by Science and Technology on Underwater Information and Control Laboratory [2021-JCJQ-LB-030-06]; the National Natural Science Foundation of China [11972138].