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스퍼 기어의 유한요소해석 조건에 따른 전달 오차 경향성 분석
김재승,손종현,김민근,이근호,김수철,Jaeseung Kim,Jonghyeon Sohn,Min-Geun Kim,Geunho Lee,Suchul Kim 한국전산구조공학회 2023 전산구조공학 Vol.36 No.2
Finite element analysis is widely used to predict the structural stability and tooth contact performance of gears. This study focused on the effect of finite element modeling conditions of a spur gear on the simulation result and the model simplification. The gear body and teeth, teeth width, configuration of mesh, frictional coefficient, and simulation time interval (gear mesh cycle division) were selected for model simplification for gear analysis. The static transmission error during a single-gear mesh cycle was calculated to represent the performance of the gear, and the elapsed time was measured as a simplification factor. Contact stress distribution was also checked. The differences in maximum transmission error and elapsed time depending on the model simplification methods were analyzed. After all simplification methods were estimated, an optimal combination of the methods was defined, and the result was compared with that of the most detailed modeling methods.
하악지 시상 분할골절단술과 동시에 시행되는 우각부 절제술
김재승,장현호,류성호,강재현,이승호,Kim, Jae-Seung,Chang, Hyun-Ho,Ryu, Sung-Ho,Kang, Jae-Hyun,Lee, Seung-Ho 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.3
A prognathic mandible and prominent gonial angle are considered to be unattractive in the Orient because it gives the face a square and muscular appearance. Requests for contouring of the mandibular angle are rare in the other race but are much more common in Korea and, through out the Orient. So, we often encounter a patient with a prognathic mandible and squarish or broad face who wishes to have his or her facial size reduced minimally or to acquire a round or slender appearance. But, mandibular angle is located in the deepest part of the operative field and the strong tension of the lateral soft tissue makes retraction difficult. It is extremely difficult to reduce the gonial angle with sagittal split ramus osteotomy by intraoral approach at the same time. We apply the method of gonial angle reduction during SSRO and had satisfactory results. We will present our results and hope to give some useful information for management of mandibular deformity.