Modal Analysis of Lenses Used in Automotive Lighting Industry and Obtaining MAC Matrix

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ID: 5447
2019
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Abstract
In this study, 4 different pieces of automotive rear lamp lenses which are made of Polymethylmethacrylate (PMMA) and have different geometries have been inspected. Free-free natural frequencies and mode shapes of lenses have been estimated by the help of ANSYS WB® Finite Element Analysis (FEA) software. Meanwhile, by the help of Experimental Modal Analysis (EMA) methods; natural frequencies, damping ratios and mode shapes of the lenses have been determined. Finally, mode shapes calculated by FE and measured by EMA were compared and Modal Assurance Criteria matrix (MAC) was determined. After experimental modal tests, FRF’s were calculated by DEWESoft® X3 software then natural frequencies, damping ratios and mode shapes were calculated by the use of ME’scope® VESVT-570 Visual Modal software. In addition, MAC was calculated by the help of MEScope® software. The main reason for the use of such experimental methods was to understand if the assumptions made before theoretical analysis were satisfied in reality or not.
Reference Key
erhan2019modalinternational Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Erhan Ay;Barış Ediz;Birhat Sönmezay;Sevda Telli Çetin and
Journal international journal of engineering and applied sciences
Year 2019
DOI
10.24107/ijeas.571192
URL
Keywords
Auotomotive Lighting Polymethylmethacrylate Finite Element Modal Analysis Experimental Modal Analysis Modal Assurance Criteria

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