승용차용 알루미늄 시트의 경량화 및 내구성능 향상을 위한 최적설계

Optimal Design of the Passenger Vehicle Aluminum Seat for Weight Reduction and Durability Performance Improvement

  • Kim Byung-Kil (8F Fine Bldg., ATES) ;
  • Kim Min-Soo (School of Mechanical and Automotive Engineering, Kookmin University) ;
  • Kim Bum-Jin (Graduate School of Automotive Engineering, Kookmin University) ;
  • Heo Seung-Jin (School of Mechanical and Automotive Engineering, Kookmin University)
  • 발행 : 2005.05.01

초록

In order to minimize weight of vehicle seat, an optimum design of aluminum seat is presented while satisfying stress and fatigue life constraints. In this study, the analysis model is validated by comparing it's stress with that of test. Then, two-level orthogonal array is used to estimate the design sensitivity for 7 design variables. Finally, the sequential approximate optimization (SAO) is performed using the constructed RSM models. The approximate RSM models are sequentially updated using the analysis results corresponding to the approximate optimum obtained during the SAO. After 14 analyses, the SAO gives an optimal design that can reduce 16.7$\%$ of weight while increasing 369$\%$ of fatigue life and satisfying stress constraint.

키워드

참고문헌

  1. M. S. Kim, C. W. Lee, S. H. Son, H. J. Yim and S. J. Heo, 'Shape Optimization for Improving Fatigue Life of a Lower Control Arm Using the Experimental Design,' Transactions of KSAE, Vol.11, No.3, pp.161-166, 2003
  2. Dary L. Logan, Mechanics of Materials, Harper Collins Publisher Inc., U.S .A., 1991
  3. W. M. John Peter, Statistical Design and Analysis of Experiments, SIAM, Philadelphia, pp.184-186, 1998
  4. MSC-Fatigue Quick Start Guide Ver.9, MSC Software, pp.69-73, 2001
  5. M. S. Kim and S. J. Heo, 'Conservative Quadratic RSM Combined with Incomplete Small Composite Design and Conservative Least Squares Fitting,' KSME International Journal, Vol.17, No.5, pp.705-714, 2003
  6. M. S. Kim, R-INOPL Ver. 1.5: User's Guide for Response Surface Modeling and Approximate Optimization, 2003