Modal Analysis Of Automotive Rear Lamp Lens Produced From Plastic Material

Abstract

In this study; first of all, finite element undamped modal analysis was performed on one of the automotive rear lamp lenses and were obtained natural frequencies and mode shapes. Then, Frequency Response Functions (FRF) of an automotive rear lamp lens, made of polymethyl methacrylate (PMMA) material, were obtained by using Impact Hammer Test Methods. At the same time; dynamic characteristics of the structure, natural frequencies, damping ratios and mode shapes were obtained. Damping ratios were calculated from the FRF’s by using the Half Power Method. Finite Element Analysis (FEA) results and test results were compared and the best test method was determined.