Damage identification in gravity dams using dynamic coupled hydro-mechanical XFEM
Damage identification in gravity dams using dynamic coupled hydro-mechanical XFEM
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DOI：
10.1007/s10999-017-9367-4
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发表时间：
2018-03-01
影响因子：
3.7
通讯作者：
Lahmer, Tom
中科院分区：
文献类型：
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作者：
Alalade, Muyiwa;Long Nguyen-Tuan;Lahmer, Tom
为了最大限度地提高效率和降低风险的运行大坝，一个有效的和高效的方法，采用反分析的动力耦合水力-力学问题。数值模型是基于扩展的有限元模型。所提出的方法是能够识别裂缝，这可能是有害的结构性能和可靠性。尝试使用基于确定性和启发式的策略来解决不适定的反问题，并确定裂纹的位置，尺寸和方向。此外，研究了搜索空间和代价函数条件对裂纹参数识别的影响。所提出的方法显示出良好的效果，在一个全面运作的大坝裂缝识别。
In order to maximize efficiency and reduce the risk of failure in operational dams, an effective and efficient method which employs the inverse analysis of a dynamic coupled hydro-mechanical problem is proposed. The numerical model is based on the extended finite element model. The proposed method is able to identify cracks which may be detrimental to structural performance and reliability. An attempt is made using both deterministic and heuristic based strategies to solve the ill-posed inverse problem and identify the location, dimension and orientation of the crack. More so, the influence of the search space and conditioning of the cost function in identifying crack parameters are investigated. The proposed method shows promising results in the identification of cracks in a fully operational dam.