Calculation of the Modulus of Elasticity with Using Natural Frequency Formula and Updated Finite Element Analysis Of Automotive Rear Lamp Lens

Authors : ERHAN AY, Bariş EDİZ, Taner ÇAL, SEVDA TELLİ ÇETİN

Pages : 27-31

Doi:10.30939/ijastech..541253

View : 14 | Download : 9

Publication Date : 2019-06-30

Article Type : Research Paper

Abstract :In this study; the weight of the modal accelerometer used in the Roving Hammer Impact Test Method was added in the finite element analysis insert ignore into journalissuearticles values(FEA); and the undamped modal analysis of the automotive rear lamp lenses were performed. Also, calculated new Elastic Modulus for Polymethylmethacrylate insert ignore into journalissuearticles values(PMMA); material with using natural frequency formula and this value was used in the ANSYS WB program and the undamped modal analysis was repeated. After that, frequency response functions insert ignore into journalissuearticles values(FRFs); of an automotive rear lamp lens were obtained by using Roving Hammer Impact Test Method. 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. Finally, experimental modal analysis insert ignore into journalissuearticles values(EMA); and FEA results were compared.
Keywords : Automotive Rear Lamp, Finite Element Analysis, Frequency Response Function FRF, Half Power Method, Impact Hammer Test Method, Experimental Modal Analysis