Nonlinear system identification of mechanical interfaces based on wave scattering

Keegan J. Moore; Mehmet Kurt; Melih Eriten; D. Michael McFarland; Lawrence Bergman; Alexander F. Vakakis

doi:10.1007/978-3-319-29763-7_32

Nonlinear system identification of mechanical interfaces based on wave scattering

Keegan J. Moore, Mehmet Kurt, Melih Eriten, D. Michael McFarland, Lawrence Bergman, Alexander F. Vakakis

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We study stress wave propagation in two impulsively forced split Hopkinson bar systems: one with a prestressed interface and one with a frictional interface. We first consider only primary wave transmission and reflection, allowing for reduction of the problem to a first-order, strongly, nonlinear ordinary differential equation. A high-order finite element model is then developed and used to validate the results of the primary-pulse model. A spring that hardens with increasing preload is used to model the prestressed interface while an Iwan element is used to model the frictional interface. Using the primarywave propagation model, we perform nonlinear system identification by matching simulation and experiment results and identify the nonlinear hardening characteristics for the prestressed interface and Iwan parameters for the frictional interface. These parameters are then used in the finite element model to compare the experimentally measured secondary effects with the simulated effects. Our results demonstrate that the primary-wave propagation model can be used as a reduced order model for nonlinear system identification at a fraction of the computational cost of higher-order models.

Original language	English (US)
Title of host publication	Dynamics of Coupled Structures - Proceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016
Editors	Daniel Rixen, Matt Allen, Randall L. Mayes
Publisher	Springer New York LLC
Pages	333-339
Number of pages	7
ISBN (Print)	9783319297620
DOIs	https://doi.org/10.1007/978-3-319-29763-7_32
State	Published - Jan 1 2016
Event	34th IMAC, A Conference and Exposition on Structural Dynamics, 2016 - Orlando, United States Duration: Jan 25 2016 → Jan 28 2016

Publication series

Name	Conference Proceedings of the Society for Experimental Mechanics Series
Volume	4
ISSN (Print)	2191-5644
ISSN (Electronic)	2191-5652

Other

Other	34th IMAC, A Conference and Exposition on Structural Dynamics, 2016
Country	United States
City	Orlando
Period	1/25/16 → 1/28/16

Keywords

Interface dynamics
Iwan elements
Mechanical joints
Nonlinear system identification
Wave propagation

ASJC Scopus subject areas

Engineering(all)
Computational Mechanics
Mechanical Engineering

Access to Document

10.1007/978-3-319-29763-7_32

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Cite this

Moore, K. J., Kurt, M., Eriten, M., McFarland, D. M., Bergman, L., & Vakakis, A. F. (2016). Nonlinear system identification of mechanical interfaces based on wave scattering. In D. Rixen, M. Allen, & R. L. Mayes (Eds.), Dynamics of Coupled Structures - Proceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016 (pp. 333-339). (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 4). Springer New York LLC. https://doi.org/10.1007/978-3-319-29763-7_32

Nonlinear system identification of mechanical interfaces based on wave scattering. / Moore, Keegan J.; Kurt, Mehmet; Eriten, Melih; McFarland, D. Michael; Bergman, Lawrence; Vakakis, Alexander F.

Dynamics of Coupled Structures - Proceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016. ed. / Daniel Rixen; Matt Allen; Randall L. Mayes. Springer New York LLC, 2016. p. 333-339 (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 4).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Moore, KJ, Kurt, M, Eriten, M, McFarland, DM, Bergman, L & Vakakis, AF 2016, Nonlinear system identification of mechanical interfaces based on wave scattering. in D Rixen, M Allen & RL Mayes (eds), Dynamics of Coupled Structures - Proceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016. Conference Proceedings of the Society for Experimental Mechanics Series, vol. 4, Springer New York LLC, pp. 333-339, 34th IMAC, A Conference and Exposition on Structural Dynamics, 2016, Orlando, United States, 1/25/16. https://doi.org/10.1007/978-3-319-29763-7_32

Moore KJ, Kurt M, Eriten M, McFarland DM, Bergman L, Vakakis AF. Nonlinear system identification of mechanical interfaces based on wave scattering. In Rixen D, Allen M, Mayes RL, editors, Dynamics of Coupled Structures - Proceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016. Springer New York LLC. 2016. p. 333-339. (Conference Proceedings of the Society for Experimental Mechanics Series). https://doi.org/10.1007/978-3-319-29763-7_32

Moore, Keegan J. ; Kurt, Mehmet ; Eriten, Melih ; McFarland, D. Michael ; Bergman, Lawrence ; Vakakis, Alexander F. / Nonlinear system identification of mechanical interfaces based on wave scattering. Dynamics of Coupled Structures - Proceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016. editor / Daniel Rixen ; Matt Allen ; Randall L. Mayes. Springer New York LLC, 2016. pp. 333-339 (Conference Proceedings of the Society for Experimental Mechanics Series).

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