基于双参数的结构损伤两阶段检测方法研究

Two-stage Structural Damage Identification Based on Two Index

研究两阶段结构损伤检测方法,建立结构有限元模型,计算曲率模态指标,并根据该指标进行损伤定位。然后计算可能损伤分段每个单元的模态矩参数,估计出损伤分段的损伤程度。对以上2个损伤识别参数进行参数分析,将分析结论用于典型损伤工况的识别并取得成功。文中方法可以确定结构损伤位置,同时针对具体损伤位置给出大致的损伤系数估计值。

The two-stage structural damage identification is a promising scheme in structural damage detection. In this paper, two new damage identification parameters namely modal curvature index （MCI） and modal moment index （MMI） were introduced into the scheme. By this method, structural damages can be located and quantified in the two stages independently. And the method was applied to the FE models of a simple beam. It turns out to be valid and practical by numerical analysis.