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Birfield Joint(BJ)의 내부력에 대한 다물체 동역학 해석
유창범(Changbeom Yu),박정률(Jeonglyul Park),오병기(Byungki Oh) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The purpose of this paper is to analyze internal forces of Birfield Joint(BJ) using multibody dynamics. Calculating internal forces is critical to optimize design of BJ. The dynamic model of BJ is defined by considering relative motions between internal parts which are inner race, ball, cage and outer race. The contact forces between internal parts are modeled by Hertzian contact theory and frictions are modeled by fluid friction using MSC.ADAMS user-written subroutines. Internal forces of BJ with articulation angle variation are studied and verified with experimental results.
Tirpod Constant Velocity Joint(TJ)의 PR에 관한 다물체 동역학 해석
유창범(Changbum Yu),배병철(Byoungchul Bae),박정률(Jeonglyul Park) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Constant velocity joints in automobiles have been used as important parts that transmit touque from a transmission to wheel. They are classified as plunge type and fixed type joints. The plunge type joints have two important phenomena called the GAF(Generated Axial Force) and the PR(Plunging Resistence) to cause NVH(Noise Vribration Harshness) problems of an automobile. Especially the PR is known as the basic cause of an idle booming phenomenon which generates automobile body vibrations and noise in a stopped automatic transmission vehicle with “D”(Drive) mode, which make worse the riding comfort of an automobile. Therefore many manufacturers producing constant velocity joints have researched the way to reduce the PR of their products. In this paper, the dynmaic model of TJ (the typical plunge type joint) including the kinematic, contact and friction model is used to simulate the PR. The multi-body dynamic analysis of TJ is conducted by using MSC.ADAMS and the result of the analysis is compared with the experimental results to verify the dynamic model of TJ. Cosequently the developed dynamic model of TJ is able to predict properly the PR and used to study design parameters.
Tripod형 등속조인트의 축력에 미치는 설계변수 영향 분석
유창범(Changbeom Yu),오병기(Byungki Oh),박정률(Jeonglyul Park) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Low vibration constant velocity joint has been developed for improvement of riding comfort. “Low vibration” means to reduce GAF(Generated Axial Force) at constant velocity joint. There are many problems for developing constant velocity joint to reduce GAF through tests of physical model. In this paper, dynamic analyses of tripod constant velocity joint using virtual model were performed by changing value of design variables which have possibility of affecting GAF. And GAF effect and interaction of design variables were studied by developed calculation method of GAF performance index. From the result of dynamic analyses suitable value and range of the design variables were suggested to reduce GAF.