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R. Belevicius¹, D. Jatulis², D. Rusakevicius³ and D. Šešok¹

¹Department of Information Technologies, Vilnius Gediminas Technical University, Lithuania
²Department of Bridges and Special Structures, Vilnius Gediminas Technical University, Lithuania
³Department of Engineering Mechanics, Vilnius Gediminas Technical University, Lithuania

Keywords: evolutionary algorithm, guyed mast, topology optimization, shape optimization, sizing optimization, MATLAB.

Summary

A technique for simultaneous topology, shape and sizing optimization of tall guyed masts is presented in this paper. A typical scheme for telecommunication masts being triangular in-plan and supported by a certain number of guy levels, is examined. The objective function is the total mass of the mast including the mass of the guys. The mast structure is optimized for self-weight and wind loading that is evaluated according to Eurocode 3 using the patch-load methodology. The non-linear behaviour of the guyed mast is simplified by idealizing the non-linear guys as approximate boundary conditions for the mast. The constraints are assessed also using the Eurocode 3 and involve all strength, local and global stability, and slenderness requirements. The design variables include all geometrical parameters of the mast and mast elements along with the pre-stress forces in the guys. The optimization problem is solved using evolutionary algorithms from the MATLAB toolbox. As an example, a typical 96 m guyed broadcasting antenna for mobile-phone networks was designed employing the proposed optimization technique. The optimal scheme of mast and optimal ranges of all design variables were obtained. Comparison of optimal scheme with the typical industrial design shows the possibilities for significant reduction in the cost of the steel.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 108 PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping Paper 169 Optimal Schemes for Tall Guyed Telecommunication Masts R. Belevicius¹, D. Jatulis², D. Rusakevicius³ and D. Šešok¹ ¹Department of Information Technologies, Vilnius Gediminas Technical University, Lithuania ²Department of Bridges and Special Structures, Vilnius Gediminas Technical University, Lithuania ³Department of Engineering Mechanics, Vilnius Gediminas Technical University, Lithuania doi:10.4203/ccp.108.169 purchase the full-text of this paper Full Bibliographic Reference for this paper , "Optimal Schemes for Tall Guyed Telecommunication Masts", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 169, 2015. doi:10.4203/ccp.108.169 Keywords: evolutionary algorithm, guyed mast, topology optimization, shape optimization, sizing optimization, MATLAB. Summary A technique for simultaneous topology, shape and sizing optimization of tall guyed masts is presented in this paper. A typical scheme for telecommunication masts being triangular in-plan and supported by a certain number of guy levels, is examined. The objective function is the total mass of the mast including the mass of the guys. The mast structure is optimized for self-weight and wind loading that is evaluated according to Eurocode 3 using the patch-load methodology. The non-linear behaviour of the guyed mast is simplified by idealizing the non-linear guys as approximate boundary conditions for the mast. The constraints are assessed also using the Eurocode 3 and involve all strength, local and global stability, and slenderness requirements. The design variables include all geometrical parameters of the mast and mast elements along with the pre-stress forces in the guys. The optimization problem is solved using evolutionary algorithms from the MATLAB toolbox. As an example, a typical 96 m guyed broadcasting antenna for mobile-phone networks was designed employing the proposed optimization technique. The optimal scheme of mast and optimal ranges of all design variables were obtained. Comparison of optimal scheme with the typical industrial design shows the possibilities for significant reduction in the cost of the steel. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £75 +P&P)
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