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通过提取波数空间信息的方法,研究二维板结构的相关力学行为及其传播特性。研究结果表明:在中频激励下,加筋板结构会产生导波定向传播现象。据此分别建立正常模型和损伤模型并进行分析,解决了检测结构损伤存在性问题,为后续的试验工作打下了基础。与结构健康监测领域传统的智能材料主动控制与兰姆波相结合的研究方法相比,此检测方法工作频率相对较低且易于操作。
By extracting the wavenumber space information, the correlation mechanics behavior and propagation characteristics of two-dimensional plate structure are studied. The results show that under medium frequency excitation, stiffened plate structure will lead to guided wave propagation. Based on this, the normal model and the damage model are respectively established and analyzed, which solves the problem of the existence of structural damage detection and lays the foundation for the subsequent experimental work. Compared with the traditional smart material active control and Lamb wave combination method in the field of structural health monitoring, the detection method is relatively low frequency and easy to operate.