Department of Biomechatronics, Faculty of Electrical and Control Engineering, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.
Institute of Mechanics and Mechanical Engineering, Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.
Sensors (Basel). 2021 Nov 7;21(21):7394. doi: 10.3390/s21217394.
Damage detection in structural components, especially in mechanical engineering, is an important element of engineering practice. There are many methods of damage detection, in which changes in various parameters caused by the presence of damage are analysed. Recently, methods based on the analysis of changes in dynamic parameters of structures, that is, frequencies or mode shapes of natural vibrations, as well as changes in propagating elastic waves, have been developed at the highest rate. Diagnostic methods based on the elastic wave propagation phenomenon are becoming more and more popular, therefore it is worth focusing on the improvement of the efficiency of these methods. Hence, a question arises about whether it is possible to shorten the required measurement time without affecting the sensitivity of the diagnostic method used. This paper discusses the results of research carried out by the authors in this regard both numerically and experimentally. The numerical analysis has been carried out by the use of the Time-domain Spectral Finite Element Method (TD-SFEM), whereas the experimental part has been based on the measurement performed by 1-D Laser Doppler Scanning Vibrometery (LDSV).
结构部件中的损伤检测，特别是在机械工程领域，是工程实践中的一个重要元素。有许多损伤检测的方法，其中分析由于损伤存在而导致的各种参数的变化。最近，基于结构动态参数变化的分析方法，即固有振动的频率或模态形状，以及传播弹性波的变化，得到了快速发展。基于弹性波传播现象的诊断方法越来越受欢迎，因此值得关注这些方法的效率的提高。因此，就出现了这样一个问题：是否可以在不影响所使用诊断方法的灵敏度的情况下，缩短所需的测量时间。本文讨论了作者在这方面进行的数值和实验研究的结果。数值分析是通过时域谱有限元法（TD-SFEM）进行的，而实验部分则基于一维激光多普勒扫描测振仪（LDSV）进行的测量。
