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为研究基于振动传递率的损伤识别方法的可行性,以一钢悬臂梁为例,进行了多种仿真试验,分别研究了振动传递率的可重复性、损伤敏感性和损伤位置敏感性。仿真试验结果显示:振动传递率不依赖于结构激励荷载;对损伤具有较强的敏感性;能识别结构损伤位置。相对于多位置损伤识别相比,其对于单位置损伤识别具有更好的效果。
In order to study the feasibility of damage identification method based on vibration transfer rate, a kind of steel cantilever beam is taken as an example to conduct a variety of simulation tests. The repeatability, damage sensitivity and damage position sensitivity of vibration transfer rate are investigated respectively. The simulation results show that the vibration transfer rate does not depend on the excitation load of the structure, it has strong sensitivity to damage and can identify the position of structural damage. Compared with multi-location damage detection, it has better effect on single-site damage detection.