Dziedziech Kajetan, Staszewski Wiesław Jerzy, Mendrok Krzysztof, Basu Biswajit
Department of Robotics and Mechatronics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland.
Department of Civil, Structural and Environmental Engineering, School of Engineering, Trinity College Dublin, D02 PN40 Dublin, Ireland.
Materials (Basel). 2022 Apr 7;15(8):2722. doi: 10.3390/ma15082722.
Short-time, abrupt events-such as earthquakes and other shock loadings-often lead to damage that is difficult to detect in structures using output-only vibration measurements. The time-variant transmissibility is proposed to tackle this problem. The approach is based on two-dimensional wavelet power spectra. The time-frequency transmissibility and relevant coherence function are used for structural damage detection in structural elements in buildings. Numerical simulations and experimental tests are used in these investigations. The results are compared with the classical transmissibility and time-variant input-output wavelet approach. The paper shows that output-only measurements and wavelet-based transmissibility can be used to monitor abrupt damage-related changes to structural dynamics.
短时突发事件——如地震和其他冲击载荷——常常会导致结构损坏，而仅利用输出振动测量在结构中很难检测到这种损坏。为此提出了时变传递率来解决这一问题。该方法基于二维小波功率谱。时频传递率及相关相干函数用于建筑物结构构件的结构损伤检测。这些研究采用了数值模拟和试验测试。将结果与经典传递率和时变输入-输出小波方法进行了比较。本文表明，仅基于输出的测量和基于小波的传递率可用于监测与结构动力学中突发损伤相关的变化。
