Volume 16, Issue 1 (1-2026)
IJOCE 2026, 16(1): 131-143 |
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1- Civil Engineering Department. Shahrood University of Technology, Shahrood, Iran
Abstract: (2433 Views)
This paper presents a method for detecting the location and severity of damage in shell structures. The method relies on extracting time-domain damage-sensitive features from vibrational responses and applying topology optimization. To achieve this, singular values are extracted from the Hankel matrix using singular value (SVD) decomposition and selected as damage-sensitive features. The damage detection problem is formulated as a topology optimization problem in which damage is modeled using the solid isotropic material with penalization (SIMP) method. Sensitivity analysis is carried out using the finite difference method to compute the derivatives of the objective function with respect to the design variables, thereby enabling efficient gradient-based optimization. The objective function is defined to minimize the differences between the singular values of the reference structure and those of the model. Abaqus software is used to perform dynamic finite element analysis of the shell model and to derive acceleration responses at selected nodes, which serve as sensor locations. The results from several numerical examples demonstrate the high capability of the proposed method in accurately identifying both the location and severity of damage.
Type of Study: Research |
Subject:
Optimal design
Received: 2026/01/6 | Accepted: 2026/03/11 | Published: 2026/03/14
Received: 2026/01/6 | Accepted: 2026/03/11 | Published: 2026/03/14
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