TY - JOUR
T1 - DAMAGE IDENTIFICATION BY USING MODAL EXPANSION AND TOPOLOGY OPTIMIZATION IN THREE DIMENSIONAL ELASTICITY PROBLEMS
TT -
JF - IUST
JO - IUST
VL - 9
IS - 4
UR - http://ijoce.iust.ac.ir/article-1-408-en.html
Y1 - 2019
SP - 543
EP - 560
KW - structural health monitoring
KW - mode expansion
KW - damage identification
KW - SIMP
KW - topology optimization.
N2 - In this paper, topology optimization is utilized for damage detection in three dimensional elasticity problems. In addition, two mode expansion techniques are used to derive unknown modal data from measured data identified by installed sensors. Damages in the model are assumed as reduction of mass and stiffness in the discretized finite elements. The Solid Isotropic Material with Penalization (SIMP) method is used for parameterizing topology of the structure. Difference between mode shapes of the model and real structure is minimized via a mathematical based algorithm. Analytical sensitivity analysis is performed to obtain derivatives of objective function with respect to the design variables. In order to illustrate the accuracy of the proposed method, four numerical examples are presented.
M3
ER -