Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X



A comparison of certain elastic dissipation mechanisms via decoupling and projection techniques

Author: David L. Russell
Journal: Quart. Appl. Math. 49 (1991), 373-396
MSC: Primary 73K05; Secondary 35Q72, 73B05, 73D35
DOI: https://doi.org/10.1090/qam/1106398
MathSciNet review: MR1106398
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Abstract: In this paper we study the Euler-Bernoulli elastic beam model, modified in a variety of ways to achieve an asymptotically linear relationship between damping rate and frequency. We review the so-called spatial hysteresis model and then introduce the thermoelastic/shear diffusion model, which is obtained by coupling the originally conservative elastic equations to two different diffusion processes. We then use a decoupling/triangulation process to project the coupled system onto the subspace corresponding to the lateral displacements and velocities and show that the projected system agrees in many significant respects with the spatial hysteresis model. The procedure also indicates some possibly desirable modifications in the elastic term of the spatial hysteresis model.

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DOI: https://doi.org/10.1090/qam/1106398
Article copyright: © Copyright 1991 American Mathematical Society

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