Open AccessModified gravitational search algorithm and its application to structural damage detection
Author(s) -
Huiyong Guo,
Jiaheng Wei
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1635/1/012018
Subject(s) - gravitational search algorithm , algorithm , gravitational field , modal , search algorithm , gravitation , flexibility (engineering) , computer science , field (mathematics) , function (biology) , mathematics , physics , chemistry , statistics , classical mechanics , astronomy , particle swarm optimization , evolutionary biology , polymer chemistry , pure mathematics , biology
Gravitational search algorithm (GSA) is a novel intelligent optimization algorithm, which can be used in damage detection field. Considering it is difficult for the traditional GSA to avoid the problems of early precocity and low computational efficiency, a modified GSA is proposed to improve the detection efficiency and accuracy. First, Newton’s gravity law is described. Then, a gravitational search algorithm is introduced for damage detection and a modified gravitational search algorithm is proposed to enhance the search efficiency and accuracy. Finally, the objective function based on modal flexibility is proposed, and the modified gravitational search algorithm combined with the model updating technique is presented to detect the damage location and severity. A numerical example is given to verity the effectiveness of this algorithm. The calculated results show that the modified gravitational search algorithm can effectively detect the damage location and severity.