用矩阵结构模型进行结构损伤检测和故障诊断

Research on structural damage and fault diagnosis using measured flexibility matrices

研究了利用测量稳态柔度矩阵来识别结构损伤的理论方法 ,通过较少的测量点对高阶的有限元模型进行参数校正来识别结构损伤 ,从而避开模态选择、模态截断等情况的发生 。

In this paper,the theoretical method of structural damage and fault diagnosis using measured flexibility matrices is put forward.Damage is found through a parametric updating of a large order static finite element model using a much smaller order measurement set.This method is accomplished without any model reduction or eigenvector expansion step.Numerical simulation results demonstrate that the method is capable of locating and quantifying structural damage.