Shock Tests on Car Daytime Running Light and FEA Validation Study

Main aim of this study is to perform Finite Element Analysis (FEA) on a car Daytime Running Light (DRL) with validated system modal parameters (like damping ratio) and with measured acceleration signals during shock tests. As a result, calculated stress and strain values could be closer to real values. In addition, results and calculation time for transient analysis and Response Spectrum (RS) analysis are compared. Outcome of this comparison is to evaluate feasibility of RS calculation during design stage. In this study, SAE J577 shock and 6ms duration 30g amplitude half sine shock tests have been applied on DRL. During tests; acceleration and strain measurements have been performed. Measured acceleration signals have been applied on updated FEA model as load inputs and transient FEA has been performed. Strain results of FEA and measured strain signals during test have been compared. RS calculations have been done from measured accelerations and RS analysis has been performed. Results and calculation time of transient analysis and RS analysis have been compared