Previous Article in Journal
The Limitations on the Use of the IMO CSS Code in Project Cargo—Case Study: Grillage Design for the Sea Transport of Gas Slug Catchers
Open AccessArticle

Damage Evaluation of Free-Free Beam Based on Vibration Testing

1
Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Faculty of Engineering and Architecture, Ghent University, 9000 Gent, Belgium
2
Department of Bridge and Tunnel Engineering, Faculty of Bridge and Road, National University of Civil Engineering, Hanoi 100000, Vietnam
3
Department of Bridge and Tunnel Engineering, Faculty of Civil Engineering, University of Transport and Communications Campus in Ho Chi Minh, Ho Chi Minh 700000, Vietnam
4
Department of Bridge and Tunnel Engineering, Faculty of Civil Engineering, University of Transport and Communications, Hanoi 100000, Vietnam
5
Department of Civil Engineering, Structural Mechanics, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
*
Author to whom correspondence should be addressed.
Appl. Mech. 2020, 1(2), 142-152; https://doi.org/10.3390/applmech1020010
Received: 25 March 2020 / Revised: 1 May 2020 / Accepted: 4 May 2020 / Published: 9 May 2020
(This article belongs to the Collection Fracture, Fatigue, and Wear)
Damage can be detected by vibration responses of a structure. Damage changes the modal properties such as natural frequencies, mode shapes, and damping ratios. Natural frequency is one of the most frequently used damage indicators. In this paper, the natural frequency is used to monitor damage in a free-free beam. The modal properties of the intact free-free beam are identified based on a setup of 15 accelerometers. A finite element model is used to model the free-free beam. Three models are considered: beam (1D), shell (2D), and solid (3D). The numerical models are updated based on the first five bending natural frequencies. The free-free beam is damaged by a rectangle cut. The experiment is re-setup and the model properties of the damaged beam are re-identified. The cuttings are modeled in the numerical simulations. The first five numerical bending natural frequencies of the damaged beam are compared with the experimental ones. The results showed that the 1D beam element model has the highest errors, while the 2D and 3D models have approximately the same results. Therefore, the 2D representation can be used to model the damaged beam for fast computation. View Full-Text
Keywords: structural health monitoring (SHM); damage detection; vibration-based method; free-free beam; finite element method (FEM) structural health monitoring (SHM); damage detection; vibration-based method; free-free beam; finite element method (FEM)
Show Figures

Figure 1

MDPI and ACS Style

Nguyen, D.H.; Ho, L.V.; Bui-Tien, T.; De Roeck, G.; Wahab, M.A. Damage Evaluation of Free-Free Beam Based on Vibration Testing. Appl. Mech. 2020, 1, 142-152.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Back to TopTop