11 April 2017 Toward structurally integrated locally resonant metamaterials for vibration attenuation
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In this contribution, we explore the use of locally resonant metamaterials for multi-functional structural load- bearing concepts using analytical, numerical, and experimental techniques. Locally resonant metamaterials exhibit bandgaps at wavelengths much larger than the lattice dimension. This is a promising feature for low- frequency vibration attenuation. The presented work aims to investigate highly integrated structural concepts and experimentally validated prototypes for vibration reduction in load-bearing applications. The goal is to explore and extend the design space of lightweight structural systems, by designing multi-functional periodic structural elements, preserving structural stiffness while concurrently enabling sufficiently wideband damping performance over a target frequency range of interest. Following a generalized theoretical modeling framework for bandgap design and analysis in finite structures, the focus is placed on the design, fabrication, and analysis of a load-carrying frame development with internally resonant components. Finite-element modeling is employed to design and analyze the frequency response of the frame and simplified analytical solution is compared with this numerical solution. Experimental validations are presented for a 3D-printed prototype. The effects of various parameters are reported both based on numerical and experimental findings.
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Jascha U. Schmied, Jascha U. Schmied, Christopher Sugino, Christopher Sugino, Andrea Bergamini, Andrea Bergamini, Paolo Ermanni, Paolo Ermanni, Massimo Ruzzene, Massimo Ruzzene, Alper Erturk, Alper Erturk, } "Toward structurally integrated locally resonant metamaterials for vibration attenuation", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 1016413 (11 April 2017); doi: 10.1117/12.2260306; https://doi.org/10.1117/12.2260306

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