Improved damage quantification from elemental modal strain energy change
Improved damage quantification from elemental modal strain energy change
复制标题
DOI：
10.1061/(asce)0733-9399(2002)128:5(521
复制
发表时间：
2002-05-01
期刊：
影响因子：
--
通讯作者：
Zhang, LM
中科院分区：
文献类型：
--
作者：
Shi, ZY;Law, SS;Zhang, LM
提出了一种改进的基于结构损伤前后单元模态应变能变化的结构损伤定量算法。该算法在损伤量化中包含了系统的解析刚度矩阵和质量矩阵。该算法显著减小了计算中高阶解析模态的模态截断误差和有限元建模误差，改善了Shi等（2000）提出的算法的收敛性。“从单元模态应变能变化进行结构损伤检测。“J. Eng. Mech.，126（12），1216-1223]。数值算例和两层门式刚架的试验结果表明，该方法是一种有效的损伤定量方法。
An improved structural damage quantification algorithm is presented based on the elemental modal strain energy change before and after the occurrence of damage in a structure. The algorithm includes the analytical stiffness and mass matrices of the system in the damage quantification. It reduces significantly the modal truncation error and the finite-element modeling error from higher analytical modes in the computation, and it improves the convergence properties of the existing algorithm by Shi et al. (2000). "Structural damage detection from elemental modal strain energy change." J. Eng. Mech., 126(12), 1216-1223]. The effectiveness of the proposed algorithm is demonstrated via a numerical example and experimental results from a two-storey steel portal frame, and it is demonstrated to be an efficient and robust method for damage quantification.