Damage Detection in Beams Using Frequency Response Function Curvatures Near Resonating Frequencies

  • Subhajit Mondal
  • Bidyut Mondal
  • Anila Bhutia
  • Sushanta ChakrabortyEmail author
Conference paper


Structural damage detection from measured vibration responses has gain popularity among the research community for a long time. Damage is identified in structures as reduction of stiffness and is determined from its sensitivity towards the changes in modal properties such as frequency, mode shape or damping values with respect to the corresponding undamaged state. Damage can also be detected directly from observed changes in frequency response function (FRF) or its derivatives and has become popular in recent time. A damage detection algorithm based on FRF curvature is presented here which can identify both the existence of damage as well as the location of damage very easily. The novelty of the present method is that the curvatures of FRF at frequencies other than natural frequencies are used for detecting damage. This paper tries to identify the most effective zone of frequency ranges to determine the FRF curvature for identifying damages. A numerical example has been presented involving a beam in simply supported boundary condition to prove the concept. The effect of random noise on the damage detection using the present algorithm has been verified.


Structural damage detection Frequency response function curvature Finite element analysis 


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Copyright information

© Springer India 2015

Authors and Affiliations

  • Subhajit Mondal
    • 1
  • Bidyut Mondal
    • 1
  • Anila Bhutia
    • 1
  • Sushanta Chakraborty
    • 1
    Email author
  1. 1.Department of Civil EngineeringIndian Institute of Technology KharagpurKharagpurIndia

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