A New Damage Index for Structural Health Monitoring: A Comparison of Time and Frequency Domains

Fergyanto E. Gunawan*, Tran Huu Nhan, Muhammad Asrol, Yasuhiro Kanto, Insannul Kamil, Sutikno

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)

Abstract

With the adoption of the damage tolerance design principle, the health monitoring system has become an integral part of the operation of engineering structures. For the system to work, a damage indicator that describes the structural integrity level should be established and monitored. The damage indicator is usually derived from structural responses. Many quantities have been proposed for damage indicator including natural frequency, mode shape, curvature, strain energy, and t-, F-, and z-statistics. In this paper, we propose a new damage indicator in the time and frequency domains derived from the Euler-Bernoulli beam theory. We evaluate the method by using data obtained from a numerical simulation of a cracked beam. The beam deformation is nonlinear due to the contact between the crack faces during vibration. The proposed damage index is estimated in the domains for various observation points on the beam. Besides, the existence of the crack is also predicted by the widely used traditional method based on the change of the natural frequency and mode shape. A comparison is made between the present method and the existing ones. We conclude the present proposal is more sensitive to detect the crack.

Original languageEnglish
Pages (from-to)930-935
Number of pages6
JournalProcedia Computer Science
Volume179
DOIs
Publication statusPublished - 2021
Event5th International Conference on Computer Science and Computational Intelligence, ICCSCI 2020 - Virtual, Online, Indonesia
Duration: 19 Nov 202020 Nov 2020

Keywords

  • Damage Indicator
  • Euler-Bernoulli Beam
  • Finite Element Method
  • Natural Frequency
  • Structural Health Monitoring

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