基于时域谱单元的三维压电耦合结构波传播分析

Piezoelectric actuators and sensors are widely applied in structural health monitoring (SHM). To simulate the elastic wave propagation in piezoelectric coupled structures, a 3-D piezoelectric coupled solid time-domain spectral element method (SEM) was proposed in this paper. The propagation of guided waves was analyzed in the cases in which the piezoelectric patches work as actuators or sensors by using the proposed method and the traditional finite element method (FEM). The experimental study was carried out to further validate the proposed SEM method. The results show that, compared to the FEM, the proposed SEM can reduce the computational cost and required memory space dramatically, and it has better convergence capability to simulate the A₀ mode wave. The experimental work further validates the proposed method's effectiveness.