A semi-analytical approach to design of a transducer for selective wave generation
PBN-AR
Instytucja
Wydział Inżynierii Mechanicznej i Robotyki (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Structural Health Monitoring : an international journal (45pkt w roku publikacji)
ISSN
1475-9217
EISSN
1741-3168
Wydawca
SAGE Publications Ltd.
DOI
Rok publikacji
2017
Numer zeszytu
5
Strony od-do
583--593
Numer tomu
16
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.78
Słowa kluczowe
EN
piezoelectric transducers
guided waves
wave propagation
selective wave generation
Streszczenia
Język
EN
Treść
Piezoelectric transducers are extensively employed for elastic waves–based structural health monitoring and non-destructive testing systems. In those systems, multimodal, dispersive guided waves are generated and acquired through transducers attached to, or embedded into, a structure. Although, guided waves are potentially attractive due to multiple features that can be possibly used for damage detection, there exists significant complexity associated with data analysis. Proper transducer design and/or selection can substantially facilitate damage detection, evaluation and localization through selective wave generation and/or acquisition. This article discusses a topology optimization technique as a prerequisite for transducers design. A semi-analytical approach for wavefield prediction is presented. The method consists in combining analytically calculated spectral characteristics – that is, dispersion and excitability curves – of a medium, and a numerical representation of a transducer, for prediction of the resulting displacement field generated upon application of a time- and space-varying stress field. Furthermore, the model is employed in an optimization strategy, where transducer’s topology is arranged to achieve selective excitation of a guided wave mode.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:108905
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