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A Minimal Model-Based Approach for the Fast Approximation of Wave Propagation in Complex Structures

Heinze, Christoph and Duczek, Sascha and Sinapius, Michael and Wierach, Peter (2017) A Minimal Model-Based Approach for the Fast Approximation of Wave Propagation in Complex Structures. Structural Health Monitoring, 16 (5), pp. 568-582. SAGE Publications. doi: 10.1177/1475921717697509. ISSN 1475-9217.

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Official URL: http://journals.sagepub.com/doi/abs/10.1177/1475921717697509


Guided wave-based structural health monitoring is a promising technology to continuously monitor aircraft and to identify damage. The simulation of such structures is still a numerically challenging task due to their size and complexity. In this article, a minimal model approach is proposed to allow an approximate but very fast calculation of the wave propagation. The properties being relevant to the propagation of Lamb waves or in general guided waves are determined as part of the preprocessing. These include phase velocities as well as interaction parameters of all discontinuities. The minimal model consists of two steps to calculate a time signal at specific locations. First, a ray tracing algorithm determines suitable wave paths between two points in the reduced model of the structure. Second, wave packets of every incident ray are superimposed to synthesize a time signal. The obtained results are compared with both finite element simulations and experimental measurements.

Item URL in elib:https://elib.dlr.de/107540/
Document Type:Article
Title:A Minimal Model-Based Approach for the Fast Approximation of Wave Propagation in Complex Structures
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Heinze, ChristophChristoph.Heinze (at) dlr.deUNSPECIFIED
Duczek, SaschaIFME; Otto-von-Guericke-Universität MagdeburgUNSPECIFIED
Sinapius, MichaelMichael.Sinapius (at) dlr.deUNSPECIFIED
Wierach, PeterPeter.Wierach (at) dlr.deUNSPECIFIED
Date:20 March 2017
Journal or Publication Title:Structural Health Monitoring
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1177/1475921717697509
Page Range:pp. 568-582
EditorsEmailEditor's ORCID iD
Chang, Fu-KuoStanford University, USAUNSPECIFIED
Prosser, William HNASA Langley Research Center, Hampton, USAUNSPECIFIED
Todd, MikeUniversity of California San Diego, USAUNSPECIFIED
Shultz, MarkUniversity of Cincinnati, USAUNSPECIFIED
Publisher:SAGE Publications
Series Name:Aerospace Engineering
Keywords:SHM, Lamb waves, minimal model, model reduction, ray tracing, aerospace
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials (old)
Location: Hamburg
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Heinze, Christoph
Deposited On:11 Dec 2017 12:47
Last Modified:11 Dec 2017 15:59

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