Structural damage identification method based on step-by-step deletion model

• Main Authors: GUO JIAN, WANG QIMING, ZHENG JINHAI, CHE YUFEI, WANG NING, LUO MENGYAN, ZHU RUIHU, WANG JUNLEI, ZENG HAIKUN
• Format: Patent
• Language: Chinese; English
• Published: 24.04.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a structural damage identification method based on a step-by-step deletion model. The method comprises the following steps of obtaining a curvature modal difference between a current state and an intact state of a structure; establishing a curvature modal difference polynomial regression model; carrying out matrix processing on the regression model, and carrying out parameter estimation; deleting the curvature modal difference of a certain node, re-establishing a polynomial regression model and carrying out matrix processing, and carrying out parameter estimation; analyzing the difference of regression coefficients before and after node deletion by using MWK statistics, and searching a node set which is judged to be possibly damaged; wherein the node with the maximum MWK statistical magnitude absolute value in the possible damage node set is judged as a damage node; and deleting residual sample data of the node with the maximum MWK statistic absolute value in the damage set, and repeat