A study of modal strain energy change ratio method for the damage identification of functionally graded Euler-Bernoulli beam

DOI

10.2991/iccet-15.2015.246How to use a DOI?

Keywords

Damage identification; Modal strain energy; Functionally graded Euler-Bernoulli beam; Finite element method.

Abstract

An identification method based on modal strain energy is proposed to identify the damage of a functionally graded (FG) Euler-Bernoulli beam. Based on the strain energy of the FG Euler-Bernoulli beam, the expression of element modal strain energy (EMSE) is developed for the two-node beam element with three degrees of freedom per node. The finite element method (FEM) is employed to compute the element stiffness matrix and the modal parameters of the beam. The EMSE is calculated by using the FEM results. On this basis, the damage indicator for the FG Euler-Bernoulli beam is defined by way of the change of the EMSE before and after the occurrence of damage. A numerical example is given to show the validity of the proposed method for the damage identification of the FG Euler-Bernoulli beam. Numerical results reveal that the proposed method has very good capability for identifying damage in the FG Euler-Bernoulli beam and is robust to the effects of measurement noise.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Lixin Huang
AU  - Shiyan, Yue
AU  - Zhongming Hu
AU  - Zhenzhen Yang
PY  - 2015/11
DA  - 2015/11
TI  - A study of modal strain energy change ratio method for the damage identification of functionally graded Euler-Bernoulli beam
BT  - Proceedings of the 5th International Conference on Civil Engineering and Transportation 2015
PB  - Atlantis Press
SP  - 1312
EP  - 1318
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccet-15.2015.246
DO  - 10.2991/iccet-15.2015.246
ID  - Huang2015/11
ER  -