Waveform-Based Identification of Structural Damage Using the Combined Finite Element Method and Microgenetic Algorithms
Waveform-Based Identification of Structural Damage Using the Combined Finite Element Method and Microgenetic Algorithms
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DOI：
10.1061/(asce)0733-9445(2005)131:9(1464
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发表时间：
2005-09
期刊：
影响因子：
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通讯作者：
Sang-Youl Lee;S. Wooh
中科院分区：
文献类型：
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作者：
Sang-Youl Lee;S. Wooh
本文提出了一种将有限元法与改进的均匀微遗传算法相结合的结构损伤识别方法。这项研究的新奇在于使用动态加载及其对测试结构中异常情况的响应。本文所述的技术不仅可以检测受损元件，还可以找到它们的数量、位置和损伤程度。为了验证该方法的可行性，将该算法应用于含缺陷的悬臂梁和板结构。此外，采用第一剪切变形理论对复合材料层合板进行了数值试验，并模拟了噪声的影响，研究了测量误差和测量不确定度对测量结果的影响。结果表明，该方法的优越性，从计算效率的角度来看，以及它的能力，以避免过早收敛。
This study deals with a method to identify structural damage using the combined finite element method and the advanced uniform microgenetic algorithm. The novelty of this study is the use of dynamic loading and its response due to the anomalies in a structure under testing. The technique described in this paper may allow us not only to detect the damaged elements but also to find their numbers, locations, and the extent of damage. To demonstrate the feasibility of the method, the algorithm is applied to a cantilever beam and plate structures with defects. In addition, a laminated composite plate is tested numerically using the first shear deformation theory, and the effect of noise is simulated to study the influence of measurement errors and uncertainty of the method. The results demonstrate the excellencies of the method from the standpoints of computation efficiency as well as its ability to avoid premature convergence.