研究目的
To present a semi-analytical hybrid approach for modelling the interaction of a piezoelectric transducer with a periodic elastic structure with a crack.
研究成果
The hybrid approach combines advantages of the frequency domain spectral element method and the boundary integral approach, providing low computational costs. It can be extended to the three-dimensional case and to other kinds of ultrasonic transducers.
研究不足
The method is currently applied to a two-dimensional case and may require extension to three-dimensional scenarios and other types of ultrasonic transducers.
1：Experimental Design and Method Selection:
The hybrid approach combines the frequency domain spectral element method (FDSEM) and the boundary integral approach.
2：Sample Selection and Data Sources:
A periodic layered composite structure with a piezoelectric transducer attached to its surface and a crack is considered.
3：List of Experimental Equipment and Materials:
Piezoelectric transducer, periodic elastic structure with a crack.
4：Experimental Procedures and Operational Workflow:
The FDSEM is applied to simulate dynamic behavior of the piezoelectric transducer, and the boundary integral method is used to describe wave excitation and propagation in layered periodic structures with internal defects.
5：Data Analysis Methods:
The unknown crack-opening-displacement and the traction vector in the contact area are determined via Galerkin method.
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