Modal Analysis Of Automotive Rear Lamp Lens Produced From Plastic Material

Yıl 2019, Cilt: 3 Sayı: 4, 84 - 91, 31.12.2019

Erhan Ay Bariş Ediz Taner Çal Sevda Telli Çetin

https://doi.org/10.30939/ijastech..578812

Cited By: 2

Öz

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.

Anahtar Kelimeler

Automotive Rear Lamp, Finite Element Analysis, Frequency Response Function (FRF), Half Power Method, Impact Hammer Test Method, Modal Analysis

Kaynakça

• [1] Avitabile, P. (2001). Experimental Modal Analysis. Sound and Vibration
• [2] Anonymous, Modal Tips: Roving Hammer versus Roving Accelerometer. https://community.plm.automation.siemens.com/t5/Testing-Knowledge-Base/Modal-Tips-Roving-Hammer-versus-Roving-Accelerometer/ta-p/378619
• [3] Ewins, D.J. (1995). Modal Testing: Theory and Practice, John Wiley and Sons, Inc. New York.
• [4] Anonymous, How to calculate damping from a FRF?. https://community.plm.automation.siemens.com/t5/Testing-Knowledge-Base/How-to-calculate-damping-from-a-FRF/ta-p/355050
• [5] He, J., Fu, Z. F. 2001. Modal analysis, Butterworth-Heinemann, Oxford.