A factor （CIFF）for damage detection of a beam based on the imaginary part of frequency response function was presented. This factor only from structure damaged status which avoided the disadvantage that need the dynamic characteristics of original structures. Furthermore, the system error and noise interference were considered. As a demonstration, the vibration experiment of a steel cantilever beam with local damages at different levels was conducted to validate the effectiveness of this method. The experimental results indicated that this method not only could be used to detect the locations of damages, but also could reflect the level of damages. It was shown that the proposed factor is meaningful for the damage detection in the enginering.
张宇飞 1,王山山 1. 基于频响函数虚部的梁结构损伤检测[J]. 振动与冲击, 2018, 37(2): 38-42.
Yufei Zhang 1 Shanshan Wang 1. The damage detection for a beam based on imaginary part of frequency response function. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(2): 38-42.
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