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진동내구 해석기법을 이용한 유닛 브라켓류 단품 시험모드 결정
문성인(Seongin Moon),전재욱(Jaewook Jeon),윤성식(David Yoon) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Unit brackets, suspending some sensors, subjected to acceleration loads, often fail due to self-vibration. To prevent such failures, it is necessary to understand the fatigue failure mode and to evaluate the fatigue life using tests or analysis techniques. The objective of this study is to develop the component test specifications, which are applicable to predict fatigue life at initial product design step, for unit brackets using vibration fatigue technique. To fulfill the obective, the necessity of the fatigue analysis considering resonant effect was reviewed. Also, a series of vibration fatigue analyses was carried out according to the variation of acceleration direction and magnitude. Then, the optimum vibration fatigue test specification for component, which shows equivalent failure mode with vehicle test condition, was constructed.