size optimization

Size Optimization is carried out for the decision of the inital member size distribution of a roof structure. We first calculate the deflection and member stress distributions of roof structure. This information is then used to prepare the grouping of structural members for size optimization. In this optimization of roof structure, the strain energy of the roof structure is adopted as objective function to be minimized and the initial volume, allowable stress and maximum displacement are used as constraints. We use 17 design variables. Note that the number of design variables used in this study is the same as the number of structural members decided by structural engineer. However, the grouped members is different to the one designed by structural engineer. The optimum solution is obtained after 19 iterations. From the comparision between the present result and the one desinged by engineer

Publication

1. S.J. Lee and Y.D. Han, Truss size optimization using ant colony optimization algorithm, J. AIK, Vol. 27, n.08,  pp. 21-28, 2011. (in Korean)
2. S.J. Lee and H.J. Lee, Size optimization of dome structures by using genetic algorithm with rebirthing algorithm, J. AIK, Vol. 25, n.04,  pp. 85-92, 2009. (in Korean)
3. S.J. Lee, Consulting advice to CS (2009)
4. S.J. Lee and I.S. Lee, A Study on the Variation of Post Buckling Behaviour of 2-dimensional Shallow Arch Truss after Size Optimization, Proceedings of Spring Congress of KASS,  pp.107-112, 2008. (in Korean)
5. S.J. Lee and H.R. Kim, A Study on the Shape and Thickness Optimization Techniques for Controlling Natural Frequency of Shell Structures, J. AIK, Vol. 22, n.04,  pp. 73-82, 2006. (in Korean)
6. S.J. Lee and H.R. Kim, Optimum thickness distributions of plate structure with different essential boundary conditions in the fundamental frequency maximization problem, Proceedings of Autumn Congress of KASS,  pp.227-232, 2006. (in Korean)
7. S.J. Lee and H.R. Kim, A study on the optimum thickness distributions of plate structures with different essential boundary conditions, J. Korean Asso. Spar. Struc, Vol. 5, n.04, pp. 53-59, 2005. (in Korean)
8. S.J. Lee and H.R. Kim, A comparative study on the optimum thickness distributions of plate structures according to variation of static and dynamic characteristics, Proceedings of Autumn Congress of AIK-PK,  pp.367-372, 2005. (in Korean)
9. S.J. Lee, and G.I. Park ] A study on the optimum thickness distribution of plate structure with different essential boundary conditions, Proceedings of Autumn Annual Conference of AIK (60 years), pp.175-178, 2005.10.24.-2005.10.25 (in Korean)
10. S.J. Lee, A Study on the optimum thickness distribution of plate and shell structures, J. Eng. Resear. Institute, 2004. (in Korean)
11. S.J. Lee, Shape and thickness optimizations of prismatic shells using a simple sweep geometric model, J. Compu. Struc. Eng. Institute of Korea, Vol. 13, n.02, pp. 221-230, 2000. (in Korean)
12. S.J. Lee, A study on the shape and thickness optimization of shells using CAGD through minimization of strain energy with volume constraint,  J. Compu. Struc. Eng. Institute of Korea, Vol. 12, n.04, pp. 551-561, 1999. (in Korean)