International Journal of Automotive Technology

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

MULTI-OBJECTIVE OPTIMIZATION OF THE INNER REINFORCEMENT FOR A VEHICLE'S HOOD CONSIDERING STATIC STIFFNESS AND NATURAL FREQUENCY

  • Choi, S.H. (Department of Mechanical Engineering, Graduate School, Hanyang University) ;
  • Kim, S.R. (Department of Mechanical Engineering, Graduate School, Hanyang University) ;
  • Park, J.Y. (Department of Mechanical Engineering, Graduate School, Hanyang University) ;
  • Han, S.Y. (School of Mechanical Engineering, Hanyang University)
  • Published : 2007.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

A multi-objective optimization technique was implemented to obtain optimal topologies of the inner reinforcement for a vehicle's hood simultaneously considering the static stiffness of bending and torsion and natural frequency. In addition, a smoothing scheme was used to suppress the checkerboard patterns in the ESO method. Two models with different curvature were chosen in order to investigate the effect of curvature on the static stiffness and natural frequency of the inner reinforcement. A scale factor was employed to properly reflect the effect of each objective function. From several combinations of weighting factors, a Pareto-optimal topology solution was obtained. As the weighting factor for the elastic strain efficiency went from 1 to 0, the optimal topologies transmitted from the optimal topology of a static stiffness problem to that of a natural frequency problem. It was also found that the higher curvature model had a larger static stiffness and natural frequency than the lower curvature model. From the results, it is concluded that the ESO method with a smoothing scheme was effectively applied to topology optimization of the inner reinforcement of a vehicle's hood.

Keywords

References

  1. Bendsoe, M. P. and Kikuchi, N. (1988). Generating optimal topologies in structural design using a homogenization method. Comp. Methods Appl. Mech. Eng., 71, 197-224 https://doi.org/10.1016/0045-7825(88)90086-2
  2. Bureerat, S. and Limtragool, J. (2006). Performance enhancement of evolutionary search for structural topology optimisation. Finite Elements in Analysis and Design, 42, 547-566 https://doi.org/10.1016/j.finel.2005.10.011
  3. Chu, D. N., Xie, Y. M. Hira, A. and Steven, G. P. (1996). Evolutionary structural optimization for problems with stiffness constraints. Finite Elements in Analysis and Design, 21, 239-251 https://doi.org/10.1016/0168-874X(95)00043-S
  4. Lee, T. H., Lee, D. K., Koo, J. K., Han, S. Y. and Lim, J. K. (2000). Optimization of the path of inner reinforcement for an automobile hood using design sensitivity analysis. Trans. Korean Society of Mechanical Engineers A, 24, 62-68
  5. Li, Q., Steven, G. P. and Querin, O. M. and Xie, Y. M. (2000). Structure topology design with multiple thermal criteria. Engineering Computations, 17, 715-734 https://doi.org/10.1108/02644400010340642
  6. Sigmund, O. and Petersson, J. (1998). Numerical instabilities in topology optimization: a survey on precedures dealing with checkerboards, mesh-dependencies and local minima. Structure Optimization, 16, 68
  7. Swan, C. C. and Kosaka, I. (1997). Voigt reuss topology optimization for structures with linear elastic material behaviours. Int. J. Numerical Methods in Engineering, 40, 3033-3057 https://doi.org/10.1002/(SICI)1097-0207(19970830)40:16<3033::AID-NME196>3.0.CO;2-Z
  8. Wang, S. M., Moon, H. G. and Ki, S. H. (1999). A synthetic procedure for design of reinforcement. Spring Conf. Proc., 2, Korean Society of Automotive Engineers, 405-410
  9. Xie, Y. M., Felicetti, P., Tang, J. W. and Burry, M. C. (2005). From finding for complex structures using evolutionary structural optimization method. Design Studies, 26, 55-72 https://doi.org/10.1016/j.destud.2004.04.001
  10. Xie, Y. M. and Steven, G. P. (1994). Optimal design of multiple load case structures using an evolutionary procedure. Eng. Computations, 11, 295-302 https://doi.org/10.1108/02644409410799290