http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Development and Verification of Gear Rattle Simulation Model for Agriculture Tractor PTO Gear
( Yongrae Kim ),( Suchul Kim ),( Sanggon Moon ),( Geunho Lee ),( Chanho Choi ),( Hyoungjong Ahn ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
This study shows an example of develop a gear rattle noise of simulation model for agriculture tractor PTO gears. The rattle noise is occurred by idle gear move backwards and forwards in backlash without load. The gear design parameters of the rattle noise are backlash, axial clearance, modulus, friction force of contacted gear pair and so on. A rattle analysis model that can be calculated airborne sound level in real time is developed by using 1D dynamic simulation to gathering transmission information and adopted a calculate process from EKM method. The calculated noise level of the developed simulation model correlates with the measured noise level. The results of gear rattle level that 84.32 dB at the measured transmission and 84.64 dB at the rattle analysis model are indicated by airborne sound level.
김재승(Jaeseung Kim),김수철(Suchul Kim),손종현(Jonghyeon Sohn),문상곤(Sanggon Moon),이근호(Geunho Lee) 한국항공우주학회 2020 韓國航空宇宙學會誌 Vol.48 No.12
본 논문은 회전익기용 엔진 감속기 주 기어열의 기어 웹 형상 최적화에 대해 기술하였다. 최적화 목표는 총중량, 전달 오차, 정렬 오차, 치면 하중 분포 계수 값의 최소화로 설정하였으며, 기어의 웹 두께, 웹과 축의 연결 위치, 웹과 림의 연결 위치를 설계변수로 선정하였다. 최적화 과정에서 기어의 웹, 축, 림은 3D 캐드 모델로부터 유한요소 모델로 변환되었으며, 기어 해석 프로그램 MASTA에 입력되었다. 최적화 알고리즘은 NSGA-Ⅱ를 사용하였다. 최적화 결과 주 기어열의 총 중량, 전달 오차, 정렬 오차, 치면 하중 분포 계수 값은 모두 감소하였으며, 최대 응력도 안전한 수준으로 나타나서 전반적으로 기어 성능이 개선되었음을 확인하였다. This paper presents an optimization of gear web design used in a main gear train of an engine reduction gearbox for a rotorcraft. The optimization involves the minimization of a total weight, transmission error, misalignment, and face load distribution factor. In particular, three design variables such as a gear web thickness, location of rim-web connection, and location of shaft-web connection were set as design parameters. In the optimization process, web, rim and shaft of gears were converted from the 3D CAD geometry model to the finite element model, and then provided as input to the gear simulation program, MASTA. Lastly, NSGA-Ⅱ optimization method was used to find the best combination of design parameters. As a result of the optimization, the total weight, transmission error, misalignment, face load distribution factor were all reduced, and the maximum stress was also shown to be a safe level, confirming that the overall gear performance was improved.