International Journal of Automotive Technology

The Korean Society of Automotive Engineers (한국자동차공학회)
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COMPARISON OF RIDE COMFORTS VIA EXPERIMENT AND COMPUTER SIMULATION

  • Yoo, W.S. (Mechanical Engineering, Pusan National University) ;
  • Park, S.J. (CAE Lab, Pusan National University) ;
  • Park, D.W. (Graduated School, Mechanical Design Engineering, Pusan National University) ;
  • Kim, M.S. (Graduated School, Mechanical Design Engineering, Pusan National University) ;
  • Lim, O.K. (Mechanical Engineering, Pusan National University) ;
  • Jeong, W.B. (Mechanical Engineering, Pusan National University)
  • Published : 2006.05.15
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Abstract

In this paper, the ride comfort from a computer simulation was compared to the experimental result. For measuring ride comfort of a passenger car, acceleration data was obtained from the floor and seat during highway running with different speeds. The measured acceleration components were multiplied by the proper weighting functions, and then summed together to calculate overall ride values. Testing several passenger cars, the ride comforts were compared. In order to investigate the effect of vibration signals on the steering wheel, an apparatus to measure the vibrations and weighting functions on the steering wheel were designed. The effect of the steering accelerations on the ride comfort were investigated and added for the overall ride comfort. For the computer simulations, Korean dummy models were developed based on the Hybrid III dummy models. For the Korean dummy scaling, the national anthropometric survey of Korean people was used. In order to compare and check the validity of the developed Korean dummy models, dynamic responses were compared to those of Hybrid III dummy models. The computer simulation using the MADYMO software was also compared to the experimental results.

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References

  1. BS6841 (1987). Guide to Measurement and Evaluation of Human Exposure to Whole-Body Mechanical Vibration and Repeated Shock. British Standards. London
  2. Cheung, W. S., Cho, Y. G., Yoon, Y. S. and Park, S. J. (1997). Evaluation of the ride values of passenger cars on the unevenness and endurance roads. Trans. KSNVE 7, 6, 1025−1030
  3. Griffin, M. J. (1986). Evaluation of vibration with respect to human response. SAE Paper No. 860047
  4. Griffin, M. J. (1996). Handbook of Human Vibration. Academic Press. London
  5. Gurram, R. and Vertiz, A. M. (1997). The role of automotive seat cushion deflection in improving ride comfort. SAE Paper No. 970596
  6. ISO2631-1 (1997). Mechanical Vibration and Shock Evaluation of Human Exposure to Whole-body Vibration. Int. Organization for Standardization. Geneva
  7. Janeway, R. N. (1948). Vehicle vibration limits to fit the passenger. SAE Paper No. 480061
  8. KRISS (1997). National Anthropometric Survey of Korea 1997. KRISS-97-114-IR. Korea Research Institute of Standards and Science
  9. MADYMO (1999). Database Manual 5.4 Version. TNO Automotive. Delft
  10. Mansfield, N. J. (2004). Human Response to Vibration. CRC Press. London
  11. Woo, C. K., Cheung, W. S., Park, S. J. and Kim S. H. (1997). Ride quality assessment of automotive seats by simultaneous 3-axis excitation. Trans. KSNVE 7, 1, 143-152
  12. Yoo, W. S., Park, D.W., Kim, M. S. and Hong, K. S. (2005). Optimum air pressure for an air-cell seat to enhance ride comfort. Int. J. Automotive Technology 6, 3, 251-257