Application of modal assurance criterion on metallic and composite structures

Authors

  • Raef Cherif Dept. of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, QC J1K2R1, Canada
  • C.K. Amedin Dept. of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, QC J1K2R1, Canada
  • N. Atalla Dept. of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, QC J1K2R1, Canada

Keywords:

Modal analysis, Visualization, Direct use, Experimental methods, Metallic beams, Modal assurance criterion, Modal shape, Modal testings, Mode shapes, Real measured data, Real-life applications, Test and analysis

Abstract

The article presents the use of the Modal Assurance Criterion (MAC) for the purpose of spatially comparing mode shapes to identify differences in the degrees of freedom between test and analysis modes. In modal analysis, direct use of experimental results may include errors due to measurements limitations, for example modes duplications. Most popular applications of modal testing provide direct comparisons of deformed modal shapes between analytical and experimental findings. The responses of modal testing are measured at a number of sensors, which allow visualization of the measured motion. Before performing any operation to assess the quality of the analytical model, it is paramount that a correspondence be established between the analytical and experimental methods. The MAC methodology was evaluated on simple metallic beams, plates and sandwich-composite panels. MAC was verified on real measured data, which lead to the necessity of this algorithm for real life applications especially for sandwich-composite structures.

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Published

2011-09-01

How to Cite

1.
Cherif R, Amedin C, Atalla N. Application of modal assurance criterion on metallic and composite structures. Canadian Acoustics [Internet]. 2011 Sep. 1 [cited 2023 Mar. 28];39(3):216-7. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2488

Issue

Vol. 39 No. 3 (2011)

Section

Proceedings of the Acoustics Week in Canada

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