Lamb波在复合材料板中传播的谱有限元建模和仿真

基于谱有限元对Lamb波在复合材料层合板中的传播进行了模拟。结合Gabor小波分析对谱有限元及传统有限元模拟结果与理论结果进行了对比, 并对相控阵法结构探伤的扫描过程进行了模拟和分析, 给出了Lamb波的传播和扫描图像。结果表明, 在得到更精确模拟结果的同时, 谱有限元较传统有限元法能大大缩短计算时间, 证实了该方法在模拟Lamb波在复合材料板中的传播方面的优越性。同时, 谱有限元法能很好地模拟相控阵法探伤的扫描过程, 模拟结果与实际结果吻合, 证实了本文建模方法的可行性和精确性。 

Modeling and simulation of Lamb wave propagation in composite panels based on the spectral finite element

The propagation of Lamb wave in a composite panel was modeled based on the spectral finite element (SFE). Combined with Gabor wavelet analysis, the simulated results obtained by the SFE and by the classical finite element method (FEM) were compared to the theoretical result. The scanning process of the Phased Array damage detection was simulated by the SFE, and the propagation and scanning images of Lamb wave were presented. The results show that besides getting more accurate results, the SFE is able to immensely save computing time compared with the classical FEM. Thus, the advantage of the SFE in modeling the Lamb wave propagation in composite panels is verified. The results also show that the SFE method can accurately simulate the scanning process of the Phased Array damage detection. The coincidence of the simulated results with the actual situation verifies the feasibility and veracity of the present modeling method.