A semi-analytical framework for predicting far-field responses of complex elastic waves emitters

Applications of guided waves in various fields of engineering and science rely on elastic wave emitters for
wave generation. Accurate prediction and understanding of the far-field responses of these wave emitters are
crucial for the reliable and efficient application of guided waves-based technologies. In this paper, we propose
a novel semi-analytical framework capable of predicting the far-field response of complex wave emitters of
arbitrary shape and internal structure in any type of substrate. This framework is general, and is not confined to
specific methods, enhancing its versatility. We applied the proposed semi-analytical framework to predict the
directivity patterns of two different macro-fiber composite transducers, accurately modeled using their exact
topologies. The framework’s validity was experimentally confirmed by comparing the predicted directivity
patterns with the results obtained from experimental measurements.