基于试验模态分析的单损伤检测

Study on single damage detection based on experimental modal analysis

以悬臂梁作为研究对象,对其正常状态以及不同损伤状态进行模态测试.采用了频响函数和固有频率作为结构损伤参数来判定损伤位置与损伤程度,并就这两种不同的损伤参数的敏感性进行了对比.结果表明,以频响函数的变化对结构损伤进行识别是新的有效可行的方法.

Modal tests were done on cantilever beams in their healthy and different damaged conditions.The Frequency response function(FRF) and the natural frequency were adopted as the damaged modal parameters to determine the location and extent of damages.The sensitivities of different damaged modal parameters were also studied.The results illustrated that the damage detection approach using FRF is new,efficient and simple for structures.