
基于岭估计和L曲线的损伤识别技术研究
郭惠勇1 罗乐2 盛懋1 李正良1
Structural damage identification method based on ridge estimation and L-curve
In order to solve the reliability problem of structural damage equation, a damage detection method based on ridge estimation and L-curve is presented. First, a structural damage equation based on modal strain energy sensitivity is given out. Then, considering that measurement noise will cause the ill-posed equation problem, ridge estimation is utilized to solve the damage equation and L-curve is utilized to identify optimal ridge parameter. Finally, an improved ridge estimation method is proposed to enhance the identification precision. Simulation results demonstrate that the proposed ridge estimation and L-curve method can detect structural damage locations and extent with good accuracy, the quantification results of the proposed method are obviously better than those of the basic ridge estimation and L-curve method and the truncated singular value decomposition method.
损伤识别 / 损伤方程 / 岭估计 / L曲线 / 位移模态 {{custom_keyword}} /
damage identification / damage equation / ridge estimation / L-curve / mode shape {{custom_keyword}} /
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