Open Access iconOpen Access

ARTICLE

crossmark

Cost Optimized Non-Contacting Experimental Modal Analysis Using a Smartphone

Jaafar Hallal1,2,3,*, Mohammad Hammoud2,3, Mahmoud Fakih2,3,4, Ali Hallal2,3

1 Mechanical Engineering Department, Faculty of Engineering, Lebanese University, Beirut, Lebanon
2 SDM Research Group, Mechanical Engineering Department, International University of Beirut, Beirut, Lebanon
3 Mechanical Engineering Department, Lebanese International University, Bekaa, Lebanon
4 Civil Engineering Department, Faculty of Engineering, Lebanese University, Beirut, Lebanon

* Corresponding Author: Jaafar Hallal. Email: email

Sound & Vibration 2020, 54(4), 225-236. https://doi.org/10.32604/sv.2020.011513

Abstract

The vibrations behavior analysis is an essential step in the mechanical design process. Several methods such as analytical modelling, numerical analysis and experimental measurements can be used for this purpose. However, the numerical or analytical models should be validated through experimental measurements, usually expensive. This paper introduces an inexpensive smartphone as an accurate, non-intrusive vibrations’ behavior measurement device. An experimental measurement procedure based on the video processing method is presented. This procedure allows the measurement of the natural frequencies and the mode shapes of a vibrating structure, simply by using a smartphone built-in camera. The experimental results are compared to those obtained using an accurate analytical model, where the natural frequencies error is less than 2.7% and the modal assurance criterion is higher than 0.89. In order to highlight the obtained results, a comparison has been done using a high quality and high frame per second (fps) camera-based measurement of material properties. Since the highest recovered natural frequency and its associated mode shape depend on the frame per second rate of the recorded video, this procedure has great potential in low frequencies problems such as for big structures like buildings and bridges. This validated technique re-introduces the personal smartphone as an accurate inexpensive non-contacting vibration measurement tool.

Keywords


Cite This Article

APA Style
Hallal, J., Hammoud, M., Fakih, M., Hallal, A. (2020). Cost optimized non-contacting experimental modal analysis using a smartphone. Sound & Vibration, 54(4), 225-236. https://doi.org/10.32604/sv.2020.011513
Vancouver Style
Hallal J, Hammoud M, Fakih M, Hallal A. Cost optimized non-contacting experimental modal analysis using a smartphone. Sound Vib . 2020;54(4):225-236 https://doi.org/10.32604/sv.2020.011513
IEEE Style
J. Hallal, M. Hammoud, M. Fakih, and A. Hallal "Cost Optimized Non-Contacting Experimental Modal Analysis Using a Smartphone," Sound Vib. , vol. 54, no. 4, pp. 225-236. 2020. https://doi.org/10.32604/sv.2020.011513



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • 4836

    View

  • 2919

    Download

  • 0

    Like

Share Link