Open AccessANALYSIS AND PREDICTION OF MULTIPLE-CRACKED PLASTIC BEAM
Author(s) -
Hang Xuan Le,
Luong Nguyen
Publication year - 2009
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v12i18.2381
Subject(s) - cantilever , structural engineering , flexibility (engineering) , stiffness , beam (structure) , stiffness matrix , identification (biology) , flexibility method , fitness function , finite element method , natural frequency , genetic algorithm , materials science , computer science , engineering , acoustics , mathematics , physics , vibration , statistics , machine learning , botany , biology
This paper presents a method for identification of location and depth of a crack in a cantilever beam by means of a genetic algorithm based on the signs of crack identification are beams natural frequencies. The cracked element stiffness matrix is based on the theory that local flexibility goes up because of the appearance of cracks. Crack location and depth is identified by minimizing fitness function, which performs difference between natural frequencies calculated and measured. Results show that this method helps to make prediction with high accuracy and converging speed.