서지주요정보
커넥팅 로드 베어링의 성능 해석에 관한 연구 = A study on the performance analysis of connecting rod bearings
서명 / 저자 커넥팅 로드 베어링의 성능 해석에 관한 연구 = A study on the performance analysis of connecting rod bearings / 김병직.
저자명 김병직 ; Kim, Byung-Jik
발행사항 [대전 : 한국과학기술원, 2001].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8012235

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 01013

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Comprehensive method of thermo-elastohydrodynamic lubrication analysis is proposed to predict performance of connecting rod bearing such as minimum film thickness, maximum film pressure, heat dissipation rate and oil flow rates. This method appropriately deals with elastic and thermal distortion of the bearing surface as well as cavitation phenomenon, temperature and viscosity variation in the lubrication film. Relationship between the elastic deformation of the bearing surface and the pressure generated in the lubrication film is determined by three-dimensional finite element stress analysis. Newton-Raphson iterative method is used to solve the nonlinear Reynolds equation and the equations of motion of the journal center simultaneously. Mass-conserving cavitation algorithm is used to solve the Reynolds equation taking into account the effect of the cavitation phenomenon in the oil film. The algorithm is based on the idea of the biphase mixture lubricant with properties intermediate between those of its two constituents. In this algorithm, the lubrication film is divided into pressure-generated region and cavitation region on the basis of lubricant density value. The time derivative of the lubricant density is treated as unknown value which must be determined from the Reynolds equation as well as the film pressure. Lubrication film temperature is treated as a time-dependent, two-dimensional variable which is averaged over the film thickness, while temperature of connecting rod big end is assumed to be time-independent and three-dimensional. It is assumed that a portion of the heat generated by viscous dissipation in the lubrication film is absorbed by the film itself, and the remainder flows into the bearing surface. The proportion of the heat absorbed by the lubrication film is determined so that the average film temperature over one load cycle and the average temperature of the bearing surface are identical. Thermal distortion of the bearing surface is also determined by three-dimensional finite element stress analysis. The effect of variable viscosity is included with the appropriate temperature-viscosity relationship to solve the Reynolds equation. Simulation results of the connecting rod bearing of internal combustion engine are presented. It is shown that the cavitation phenomenon, temperature and viscosity variation in the lubrication film, and elastic and thermal distortion of the bearing surface have significant effects on the performance of connecting rod bearing. It is concluded from the simulation results that the thermo-elastohydrodynamic lubrication analysis is strongly recommended to predict the bearing performance of connecting rod big end in internal combustion engine, and that the proposed method can be used as a design tool of connecting rod bearings.

서지기타정보

서지기타정보
청구기호 {DME 01013
형태사항 xi, 145 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Byung-Jik Kim
지도교수의 한글표기 : 김경웅
지도교수의 영문표기 : Kyung-Woong Kim
수록잡지명 : "Thermo-elastohydrodynamic analysis of connecting rod bearing in internal combustion engine". Transactions of the ASME, journal of tribology
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 140-145
주제 커넥팅 로드 베어링
열 탄성 유체 윤활 해석
유량 보존 캐비테이션 알고리즘
탄성 변형
열 변형
connecting rod bearing
thermo-elastohydrodynamic lubrication
mass-conserving cavitation algorithm
elastic deformation
thermal distortion
QR CODE qr code