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안내궤도 차량부품 피로수명 예측을 위한 해석 모델 개발
송하종(Ha Jong Song),우준성(Jun Sung Woo),윤지원(Ji Won Yoon),박태원(Tae Won Park),박중경(Joong Kyung Park),조동협(Dong Hyub Cho),김혁(Hyuk Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
A guideway vehicle is used in the automotive, semiconductor and LCD manufacturing industries for transportation of products. Recently, as guideway vehicle has required more light-weight and higher operating speed, fatigue life prediction of components becomes the major contents. To predict the fatigue life, it is necessary to obtain the dynamic stress time history of components. In this study, Dynamic model of guideway vehicle is developed by using the multi body dynamic analysis program and finite element models of wheels and main frame are developed. The result of dynamic analysis was verified by the vehicle traveling test. And a finite element model is verified by the wheel compression test. With these results, the reliable dynamic and finite element model are developed for the fatigue study.
유한요소법을 이용한 냉각홴의 진동 및 간섭에 관한 연구
서종휘(Seo, Jong-Hwi),송하종(Song, Ha-Jong),박태원(Park, Tae-Won),김주용(Kim, Joo-Yong),정일호(Jung, Il-Ho) 한국소음진동공학회 2004 한국소음진동공학회 논문집 Vol.14 No.9
A CFA(cooling fan assembly) is composed of a fan, motor and shroud, which is at the back of the automotive radiator. By forcing the wind to pass, the CFA controls the cooling performance of the radiator. The noise and vibration of the CFA may be primarily due to the resonance between the CFA and engine. The Interference among the fan, shroud and radiator by deformation is considered when the CFA is designed. In this paper, in order to analyze the structural vibration of the CFA for automobiles, a finite element model of the CFA is established by using a commercial FEM code. After the finite element modeling, the natural frequencies and the mode shapes are obtained from the FE analysis. The natural frequencies are obtained from the vibration test as well. Then, the results of the vibration test are compared with those of the FE analysis. The natural frequencies obtained by experiment have a great similarity to the results from FE model. We have confirmed the validity of the FE model and verify the structural safety for the resonance. The stress and displacements are obtained from FE analysis. We have confirmed the safety for the interference and failure.