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Fast Approximation of Wave Propagation in Complex Geometries

Heinze, Christoph and Sinapius, Michael and Wierach, Peter (2016) Fast Approximation of Wave Propagation in Complex Geometries. In: Proceedings of the 8th European Workshop on Structural Health Monitoring (EWSHM 2016). NDT.net. 8th European Workshop On Structural Health Monitoring (EWSHM 2016), 5.-8.7.2016, Bilbao, Spanien.

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Official URL: http://www.ndt.net/app.EWSHM2016

Abstract

A minimal model to approximate wave propagation in complex structures has been proposed in previous works of the authors. Core principle of the model is a reduction of inhomogeneities, like stiffeners, to interaction parameters and homogeneous areas to phase velocities. Combined with the plate like shape of aircraft parts relevant for SHM, a two-dimensional model is sufficient to simulate these structures. Paths taken by the waves from actuator to sensor are estimated with ray tracing. Finally, signals at selected sensor positions can be calculated with a signal synthesis algorithm. Several characteristic values of the structure significant to guided waves have to be calculated beforehand. Preparation of such a database can be costly to a certain extent, but is only necessary once per part. With a database in place, the proposed technique offers a very fast way to approximate wave propagation in large and complex structures. This paper discusses effects that influence wave propagation, sensor signals and simulation accuracy. To validate the model, measured signals and FEM solutions are compared to results of the minimal model.

Item URL in elib:https://elib.dlr.de/105386/
Document Type:Conference or Workshop Item (Speech)
Title:Fast Approximation of Wave Propagation in Complex Geometries
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Heinze, ChristophChristoph.Heinze (at) dlr.deUNSPECIFIED
Sinapius, MichaelUNSPECIFIEDUNSPECIFIED
Wierach, PeterUNSPECIFIEDUNSPECIFIED
Date:5 July 2016
Journal or Publication Title:Proceedings of the 8th European Workshop on Structural Health Monitoring (EWSHM 2016)
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmailEditor's ORCID iD
Güemes, AlfredoUniv politecnica de MadridUNSPECIFIED
Publisher:NDT.net
Status:Published
Keywords:Guided waves (Lamb waves), Modeling and simulation, Minimal model, Ray tracing
Event Title:8th European Workshop On Structural Health Monitoring (EWSHM 2016)
Event Location:Bilbao, Spanien
Event Type:international Conference
Event Dates:5.-8.7.2016
Organizer:Univ politecnica de Madrid
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:15 Aug 2016 08:13
Last Modified:31 Jul 2019 20:02

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