Damage detection in structures using a few frequency response measurements
Damage detection in structures using a few frequency response measurements
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DOI：
10.1016/s0022-460x(03)00190-1
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发表时间：
2004-02
影响因子：
4.7
通讯作者：
H. Hwang;C. Kim
中科院分区：
文献类型：
--
作者：
H. Hwang;C. Kim
提出了利用频率响应函数(FRF)数据识别结构损伤位置和损伤严重程度的方法。基本方法是通过最小化试验频响函数和解析频响函数之间的差异来检测结构损伤的位置和严重程度，这是一种模型修正或优化方法；然而，本文提出的首选方法只使用几个频率的频响函数全集中的一个向量子集，并以显式形式计算刚度矩阵和折减系数。为了验证所提方法的有效性，以简单悬臂梁和直升机旋翼叶片为例进行了数值验证。所提出的方法识别了这些物体中的损伤位置，并以令人满意的精度表征了损伤。
This paper presents methods to identify the locations and severity of damage in structures using frequency response function (FRF) data. Basic methods detect the location and severity of structural damage by minimizing the difference between test and analytic FRFs, which is a type of model updating or optimization method; however, the preferred method proposed in this paper uses only a subset of vectors from the full set of FRFs for a few frequencies and calculates the stiffness matrix and reductions in explicit form. To verify the proposed method, examples for a simple cantilever and a helicopter rotor blade are numerically demonstrated. The proposed method identified the location of damage in these objects, and characterized the damage to a satisfactory level of precision.