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The authors have investigated the NVH problems of drive system in full vehicle test. However it is difficult to define the NVH problems of driveline system. Since it is hard to measure the rotating part and it is vague that only the drive system induces the NVH problem. Vibration in a driveline is presented in this paper. In the experiment, the rear sub-frame and propeller shafts and axle were composed and mounted with rubber each other. For applying the vibration input instead of the torsional vibration effect of an engine, the shaker was taken. In particular, torsional vibration due to fluctuating forced vibration excitation across the joint between driveline and rear sub-frame was carefully examined. Accordingly, the joint response was checked from experiments and the FE-simulation using FRF (frequency response function) analysis was performed. All test results were signal processed and validated against numerical simulations. In present study, the new test bench for measuring the vibration signal and simulating the vehicle chassis system was proposed. The modal value and the mode shape of components were analyzed using the CAE model to identify the important components affecting driveline noise and vibration. It could be reached that the simplified test bench could be well established and be used for design guide and development of the vehicle chassis components.

참고문헌 (8)

  1. M. Magalhaes, F. Arruda and J. A. S. Filho, "Driveline Structure-Borne Vibration and Noise Path Analysis of an AWD Vehicle Using Finite Elements," SAE 2003-01-3641, 2003 
  2. F. Petrone, G. Fichera and M. lacagnina, "A Numerical Model to Analyze the Dynamic Response of a Vehicle to Variations in Torque Transmitted by the Drive-line," SAE 2001-01-3334, 2001 
  3. R. Capitani and M. Delogu, "Analysis of the Influence of a Vehicle's Driveline Dynamic Behaviour Regarding the Performance Perception at Low Frequencies," SAE 2001-01-3333, 2001 
  4. H. Y. Isaac Du, J. Morgan, J. M. Wong and R. Salmon, "Modeling and Correlation of Driveshaft Whirl Dynamics for RWD Sport Utility Vehicles," SAE 2001-01-1503, 2001 
  5. H. Y. Isaac Du, X. Liu, W. K. Chang and R. Salmon, "Dynamic Stress Correlation and Modeling of Driveline Bending Integrity for 4WD Sport Utility Vehicles," SAE 2002-01-1044, 2002 
  6. W. Exner, "NVH Phenomena in Light Truck Drivelines," SAE 952641, 1995 
  7. G. Steyer, M. Voight and Z. Sun, "Balancing Competing Design Imperatives to Overall Driveline NVH Performance Objectives," SAE 2005-01-2308, 2005 
  8. K.J. Kim, T.W. Park, B.I. Choi and C.W. Sung, "Effect and Reduction Method of Rotating Unbalance Mass on Vibration Characteristics of front Axle," Transactions of KSAE, Vol.15, No.6, pp.165-169, 2007 

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