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이봉현(Lee, B.H.),김찬중(Kim, C.J.),김기훈(Kim, G.H.) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.12
The vibration of Powertrain are one of the import design characteristics of a vehicle. Powertrain is mostly mounted to the front subframe and powertrain mounting has an important role in determining the vehicle vibration characteristics. In this paper, the accuracy of the vibration analysis for the front subframe is discussed. The dynamic characteristic of subframe are measured from vehicle test and the finite element model updating are performed that natural frequency, mass and MAC of the experimental and theoretical modal analysis are compared. The subframe mounting stiffness are obtained the iteration method based on the vibration of subframe from vehicle test. Finally, the result of dynamic analysis which is operated dynamic load is compared with experimental one of vehicle test.
비선형 현가계 모델을 고려한 승용차 타이어의 동특성 해석
박현만(H. M. Park),이동원(D. W. Lee),김찬중(C. J. Kim),김성래(S. R. Kim),이봉현(B. H. Lee),조춘택(C. T. Cho) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Road noise is becoming more and more important factor in improving customer satisfaction and is not an easy task because of difficulty of compatibility with various performances such as handling, ride comfort and rolling resistance. Vibration properties of suspension system including tire and wheel have a great effect on the vehicle interior noise. Therefore, it is necessary for tire developers to get a knowledge how tire is coupled with suspension in the specific frequency range. Finite element models considering a tire and suspension system have been generally constructed by using spring, damper and concentrated mass elements for the numerical analysis in the low frequency ranges. In this study, the assembly of tire/wheel and suspension system was fully modeled by using continuum elements in order to analyze the coupled dynamic characteristics up to the middle frequency ranges. This finite element model considering the relationship between tire/wheel and suspension system seems to make it effective to predict their dynamic characteristics.