Crack Estimation in Beam Structures Using High-order Finite Element Approach and Immune Algorithm

摘要：

A novel technique has been presented in this article to solve the forward and inverse problems associated with model-based crack identification, which uses immune algorithms combined with the high-order finite element method (HFEM). The HFEM is derived from the introduction of the shifted Legendre polynomials as additional shape functions within beam elements and the linear rotational spring model of crack, which has many outstanding features such as rapid convergence and requiring fewer degrees of freedom. The immune algorithm which possesses the characteristics of simple implementation and avoiding premature convergence is adopted when the crack identification is converted to an optimization problem. The experimental results show that the present strategy can effectively improve the efficiency and accuracy of crack identification problems.

关键词： Crack identification vibrational characteristics high-order finite element method Immune algorithm

作者: YUAN Yuhua YU Zhigang Wu Xun CHU Fulei

作者单位: The third institute, Qinghe Dalou Ziba, Beijing, China, 100085 Department of Precison and Mechanology, Tsinghua University, Beijing, China, 100084

会议类型: 国际会议

会议名称: 第八届国际测试技术研讨会(8th International Symposium on Test and Measurement)

会议地点: 重庆

会议语种:英文

页码: 1902-1905

在线出版日期: 2009-08-01（万方平台首次上网日期，不代表论文的发表时间）