http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Iding 진동특성을 고려한 자동차 조향계의 최적화 연구
윤희욱(Hee-Wook Yoon),강성종(Sung-Jong Kang) 한국자동차공학회 1992 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1992 No.11
In this study, the analytical method was investigated in order to predict and optimize the idling vibrational characteristics of steering system at the Initial stage of new car development using steering subsystem finite element model. Steering subsystem model which consisted of steering wheel, steering column and cowl cross member assembly was built and its validity was analyzed in order to verify usefulness of the subsystem model in predicting steering local vibration modes, modal parameters of the analysis and test results have been analyzed. And then the applications of the verified method to the design of various type of steering system under development have been described.
윤희욱(Yoon Hee-Wook),강성종(Kang Sung-Jong) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In order to evaluate and improve the Idle vibrational characteristics of A-Car steering systems, the finite element models of front body and<br/> steering systems are constructed. Using these models, dynamic<br/> characteristics (natural frequencies, modeshapes, and frequency response functions) of the initial designs are obtained. And to reduce the weight or to move salle critical natural mode into safe region, optimal redesign analysis is performed.<br/>
3기통 엔진 NVH 개선을 위한 신개념 엔진마운팅 시스템 개발
방정환(Jung-Hwan Bang),김도현(Do-Hyun Kim),윤희욱(Hee-Wook Yoon),이민섭(Min-Sup Lee),이병혁(Byung-Hyuk Lee) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
To reduce fuel cost and vehicle weight, non BSM 3-cylinder engine is increasing, but non BSM 3-cylinder engine has C1 pitch and yaw moment excitation. So compare to 4-cylinder engine vehicle, non 3-cylinder engine vehicle has more NVH problems. In this paper to solve 3-cylinder engine vehicle’s NVH problem, engine exciting force and moment equations were derived. The most effective engine mount design method was selected by engine motion equation analysis. To reduce the engine pitch moment response, engine yaw moment excitation was removed by using outer balancer and the main engine mounts were positioned powertrain pitch axis. To consider engine firing C1.5 roll excitation response, front and rear roll mount span was reduced. The new engine mount system vehicle’s idle vibration was better than 4-cylinder engine vehicle.
방정환(Bang-Jung Hwan),박재현(Park-Jae Hyun),윤희욱(Hee-Wook Yoon),이민섭(Min-Sup Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Driving response and tip-in shock vibration are conflicting performances. To improve driving response, tip-in shock problem should be solved. This study illustrates, tip-in shock’s main cause, transfer mechanism, engine mount roll stiffness compare to competitors. To solve tip-in shock, test and simulations were performed in the aspect of source, engine mount, chassis, driveline. By changing EMS, engine mount, chassis, driveline, The following conclusions were reached, to settle tip-in shock, Engine mount total roll stiffness should be increased, Turbine and Engine rpm difference should be decreased.