Abstract.
This paper considers discrete mass-spring structure identification in a nonlocal continuum space-fractional model, defined as an optimization task. Dynamic (eigenvalues and eigenvectors) and static (displacement field) solutions to discrete and continuum theories are major constituents of the objective function. It is assumed that the masses in both descriptions are equal (and constant), whereas the spring stiffness distribution in a discrete system becomes a crucial unknown. The considerations include a variety of configurations of the nonlocal parameter and the order of the fractional model, which makes the study comprehensive, and for the first time provides insight into the possible properties (geometric and mechanical) of a discrete structure homogenized by a space-fractional formulation.
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Szajek, K., Sumelka, W. Discrete mass-spring structure identification in nonlocal continuum space-fractional model. Eur. Phys. J. Plus 134, 448 (2019). https://doi.org/10.1140/epjp/i2019-12890-8
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DOI: https://doi.org/10.1140/epjp/i2019-12890-8