Numerical and experimental investigation of crack in beams using frequency contour method

 
 
 
  • Abstract
  • Keywords
  • References
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  • Abstract


    Health monitoring of Structures is a vital tool for engineers to ensure the life of important structures like Dams and bridges, Stadiums and buildings and, Platforms and vessels, Wind turbines Airframes, and large machinery and equipments. SHM helps to detect damage at earlier stage before failure occurs by sensing systems. Various damage detection methods are available in accordance with vibrational characteristics of the structure. In this paper Frequency contour method which consumes less time is employed to detect, locate, and characterize damage in structural and mechanical systems.

    Experimental and Numerical modal analysis were carried out on cracked and healthy beams of steel with cantilever support conditions of size 20mmx20mm and of length 300mm using ABAQUS. Three natural frequencies are obtained as a basic criterion for crack detection. To locate the damage of the normalized frequency in terms of location and depth of the crack were designed using MATLAB. The intersection of three contour lines represents crack location and crack depth. Prediction ofdamage using frequency contour method gives good result

  • Keywords


    Damage Detection; Frequency Contour Method; Surface Plot; Normalized Frequency.

  • References


      [1] Deokar A. V. and Wakchaure V. D., (2011) “Experimental Investigation of Crack Detection in Cantilever Beam Using Natural Frequency as Basic Criterion”,Nirma University, Ahmedabad, pp. 08-10.

      [2] Kumar, A., &Mahto, J. N. (2014). Experimental investigation of crack in aluminium cantilever beam using vibration monitoring technique. International Journal of Computational Engineering Research (IJCER).

      [3] Siebel T., et al, (2008) ”Assessment of Mode Shape-Based Damage Detection Methods under Real Operational Conditions” 6th European Workshop on Structural Health Monitoring.

      [4] Cawley, P and Adams, R. D, (1979) “The Location of Defects in Structures from Measurements of Natural Frequencies.” Journal of Strain Analysis, pp. 49-57.https://doi.org/10.1243/03093247V142049.

      [5] Mehdi Salehi, et al, (2010) “A Structural Damage Detection Technique Based on Measured Frequency Response Functions”, Journal of Contemporary Engineering Sciences, 3(5).

      [6] Jae-Hyung Park, et al,” (2008) “GA-based Damage Detection in Structures Using Frequency and Modal Strain-Energy” Pukyong National University, Korea, pp. 608-731,.

      [7] Pandey A. and Biswas M. (1995). Experimental verification of flexibility difference method for locating damage in structures. Journal of Sound and Vibration. 184:2, 311-328.https://doi.org/10.1006/jsvi.1995.0319.


 

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Article ID: 9880
 
DOI: 10.14419/ijet.v7i2.1.9880




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