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자동차 현가 부품의 유연 다물체 동역학 해석을 이용한 시스템 단위의 내구해석
이철(Chul Lee),강오성(Oh sung Kang),김동석(Dong seok Kim),류영일(Youngil Ryu),이해순(Hae soon Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Being supported by computer power enhancement, we can now extract component input forces from multi-body vehicle model running virtual durability test track directly. Hence, recently, fatigue analysis could get more power because input forces or component dynamic stress history could be calculated from dynamic simulation not from real test. In this paper, a virtual durability test process using multi-body dynamic simulation and fatigue analysis simultaneously is introduced. In dynamic simulation flexible bodies are considered when their natural modes conflict the frequency characteristics of road load. And, in fatigue analysis a seam weld model is considered.