International Journal of Automotive Technology

The Korean Society of Automotive Engineers (한국자동차공학회)
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SIZE OPTIMIATION OF AN ENGINE ROOM MEMBER FOR CRASHWORTHINESS USING RESPONSE SURFACE METHOD

  • Oh, S. (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Ye, B.W. (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Sin, H.C. (School of Mechanical and Aerospace Engineering, Seoul National University)
  • Published : 2007.02.28
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Abstract

The frontal crash optimization of an engine room member using the response surface method was studied. The engine room member is composed of the front side member and the sub-frame. The thicknesses of the panels on the front side member and the sub-frame were selected as the design variables. The purpose of the optimization was to reduce the weight of the structure, under the constraint that the objective quantity of crash energy is absorbed. The response surface method was used to approximate the crash behavior in mathematical form for optimization procedure. To research the effect of the regression method, two different methodologies were used in constructing the response surface model, the least square method and the moving least square method. The optimum with the two methods was verified by the simulation result. The precision of the surrogate model affected the optimal design. The moving least square method showed better approximation than the least square method. In addition to the deterministic optimization, the reliability-based design optimization using the response surface method was executed to examine the effect of uncertainties in design variables. The requirement for reliability made the optimal structure be heavier than the result of the deterministic optimization. Compared with the deterministic optimum, the optimal design using the reliability-based design optimization showed higher crash energy absorption and little probability of failure in achieving the objective.

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References

  1. Arora, J. S. (1989). Introduction to Optimum Design. McGraw-Hill. New York
  2. Avalle, M., Chiandussi, G. and Belingrardi, G. (2002). Design optimization by response surface methodology: application to crashworthiness design of vehicle structures. Struct. Multidisc. Optim., 26, 325-332
  3. Barros Jr, P. A., Kirby, M. R. and Mavris, D. N. (2004). Impact of sampling technique selection on the creation of response surface models. SAE Paper No. 2004-01-3134
  4. Choi, K. K. and Youn, B. B. (2001). Hybrid analysis method for reliability-based design optimization. 27th ASME Design Automation Conf. DETC2001/DAC21044, Pittsburgh, PA
  5. Choi, B. L., Choi, J. H. and Choi, D. H. (2005). Reliability-based design optimization of an automotive suspension system for enhancing kinematic and com-pliance characteristics. Int. J. Automotive Technology 6, 3, 235-242
  6. Enevoldsen, I. and Sorensen, J. D. (1994). Reliabilitybased optimization in structural engineering. Struct Safety, 15, 169-196 https://doi.org/10.1016/0167-4730(94)90039-6
  7. Gonzalez, M., Chitoor, K., Kim, H. S. and Tyan, T. (2005). Testing and modeling of metalic multicorner columns in axial crush. SAE Paper No. 2005-01-353
  8. Gu, L., Yang, R. J. and Tyan, T. (2005). Structural optimization for crash pulse. SAE Paper No.2005-01-0748
  9. Kim, B. J., Kim, M. S. and Heo, S. J. (2005). Aluminum space frame B.I.W. optimization considering multidisciplinary design constraints. Int. J. Automotive Technology 6, 6, 635-641
  10. Lancaster, P. and Salkauskas, K. (1986). Curve and Surface Fitting; An Introduction. Academic Press. London
  11. Madsen, H. O., Krenk, S. and Lind, N. C. (1986). Methods of Structural Safety. Prentice-Hall. New Jersey
  12. Myers, H. R. and Montgomery, D. C. (1995). Response Surface Methodology. John Wiley & Sons. New York
  13. Qi, C., Ma, Z. D., Kikuchi, N., Pierre, C., Wang, H. and Raju, B. (2005). Fundamental studies on crashworthiness design with uncertainties in the system, SAE Paper No. 2005-01-0613
  14. Redhe, M., Forsberg, J. and Jansson, T. (2002). Using the response surface methodology and the D-optimality criterion in crashworthiness related problems. Struct. Multidisc. Optim., 24, 185-194 https://doi.org/10.1007/s00158-002-0228-9
  15. Riha, D. S., Hassan, J., Forrest, M. and Ding, K. (2004). Stochastic approach for vehicle crash models. SAE Paper No. 2004-01-0460
  16. Youn, B. D. and Choi, K. K. (2004). A new response surface methodology for reliability-based design optimization. Computers & Structures, 82, 241-256 https://doi.org/10.1016/j.compstruc.2003.09.002
  17. Youn, B. D., Choi, K. K. and Park, Y. H. (2003). Hybrid analysis method for reliability-based design optimization. J. Mech. Des., ASME 125, 2, 221-232 https://doi.org/10.1115/1.1561042
  18. Youn, B. D., Choi, K. K., Yang, R.-J. and Gu, L. (2004). Reliability-based design optimization for crashworthiness of vehicle side impact. Struct. Multidisc. Optim., 26, 272-283 https://doi.org/10.1007/s00158-003-0345-0