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Show simple item record Long, Craig S Loveday, Philip W Ramatlo, Dineo AM Andhavarapu, EV 2018-10-19T06:04:45Z 2018-10-19T06:04:45Z 2018-09
dc.identifier.citation Long, C.S., Loveday, P.W., Ramatlo, D.M. and Andhavarapu, E.V. 2018. Numerical verification of an efficient coupled SAFE-3D FE analysis for guided wave ultrasound excitation. Finite Elements in Analysis and Design, vol 149, pp 45-56 en_US
dc.identifier.issn 0168-874X
dc.identifier.issn 1872-6925
dc.description Copyright: 2018 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Finite Elements in Analysis and Design, vol 149, pp 45-56 en_US
dc.description.abstract Numerical verification of a method to simulate piezoelectric transducers exciting infinite elastic waveguides is presented. The method, referred to as SAFE-3D, combines a 3D finite element (FE) model of a transducer with a 2D semi-analytical finite element (SAFE) model of the waveguide and accounts for the dynamics of the transducer. An interpolation procedure is employed to transfer forces and displacements between the SAFE and 3D FE models, and therefore nodes at the interface between the two models are not required to be coincident. An Abaqus/Explicit analysis, employing a thermal equivalent piezoelectric model and absorbing boundary conditions to prevent end reflections, is used to verify the accuracy of the SAFE-3D model. A piezoelectric transducer attached to the web of a rail and driven with frequency content which excites a mode cut-off is considered. A driving signal which does not contain cut-off frequencies is used for comparison. Time domain displacement results computed using Abaqus/Explicit and SAFE-3D are compared directly. Several methods to alleviate the numerical difficulties encountered by the SAFE-3D method, when transforming frequency domain displacements to the time domain, close to cut-off frequencies are evaluated. It is shown that post-processing methods have a similar effect to adding damping, but are less numerically expensive if iterative tuning of parameters is required. A SAFE-based method to extract modal amplitudes from Abaqus/Explicit time domain results is used to evaluate the accuracy of SAFE-3D in the frequency domain. Good agreement between the SAFE-3D method and results computed using Abaqus/Explicit is achieved, despite the Abaqus/Explicit and SAFE-3D models predicting slightly different cut-off frequencies. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Workflow;21319
dc.subject Abaqus/Explicit en_US
dc.subject Cut-off frequency en_US
dc.subject Modal amplitude en_US
dc.subject Piezoelectric transducer model en_US
dc.subject Semi-analytical finite element en_US
dc.subject SAFE en_US
dc.subject Train rail en_US
dc.title Numerical verification of an efficient coupled SAFE-3D FE analysis for guided wave ultrasound excitation en_US
dc.type Article en_US

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