In this paper, a CAE (Computer-Aided Engineering) methodology to simulate the vibration test and predict fatigue life of head lamp bulb shield is presented. A modal analysis is performed first to determine the critical elements from the strain energy density distribution patterns. A random vibration frequency response analysis is then performed to monitor the stress response power spectral densities (PSDs) for critical elements due to the g-load input PSDs, measured at the mounting point in all three directions. Fatigue life can be estimated based on the stress response PSDs and material S-N curve by using Dirlik's method. The fundamentals for frequency domain fatigue analysis are reviewed and a case study with test correlation is then presented.
Life Prediction for Lighting Bulb Shield Designs Subjected to Random Vibration
Sae Technical Papers
International Congress & Exposition ; 1999
1999-03-01
Conference paper
English
Life Prediction for Lighting Bulb Shield Designs Subjected to Random Vibration
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