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基于结构动力特征的小损伤识别方法研究

, PP. 69-76

Keywords: 频率比,结构损伤诊断,振动测试,小损伤

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Abstract:

为了获取基于结构动力特征的小损伤识别方法,组织实施了钢直管、钢壳及5层钢框架结构的损伤识别试验。试验结果表明,以“频率比”作为结构损伤诊断指标对于识别均匀、规整的一维(杆、索)、二维(板、壳)以及三维钢框架结构的损伤十分敏感;该指标对识别钢直管纵向大损伤及3mm横向切口的小损伤;对钢壳径向损伤及环向损伤,对5层钢框架结构的节点螺栓脱落损伤均敏感有效。

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