A two-step method for determination of mode order in structural damage identification

作者：Fei Qingguo^*; Jiang Dong; Han Xiaolin; Wu Shaoqing

来源：Journal of Vibroengineering, 2013, 15(1): 247-253.

• structural damage identification
• mode order determination
• modal effective mass
• stabilization diagram
• numerical simulation

Varieties of structural damage identification methods have been proposed in the past years. Most of the methods adopt modal information including modal frequencies and mode shapes. These methods provide excellent references for researchers and engineers in this field. However, there is still an unsolved critical problem regarding the number of modes that should be used in the identification. To circumvent this problem, a two-step method for determination of mode order is proposed. Modal effective mass analysis is used to estimate the range of mode orders in the first step. Stabilization diagram analysis is then employed in the second step to decide the reasonable mode order. In the numerical simulation, the proposed method is used to determine the mode order in the damage localization of a truss structure. Results demonstrate that all of the damaged elements are correctly identified when adopting reasonable mode order determined by the proposed method.

• 出版日期2013-3
• 单位东南大学