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Multi-objective robust optimization of tapered lattice towers under geometrical uncertainties using homogenization
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Multi-objective robust optimization of tapered lattice towers under geometrical uncertainties using homogenization

Moussavi, S. H

Multi-objective robust optimization of tapered lattice towers under geometrical uncertainties using homogenization

Moussavi, S. H ; Sharif University of Technology | 2024

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  1. Type of Document: Article
  2. DOI: 10.1007/s12008-024-02175-5
  3. Publisher: Springer , 2024
  4. Abstract:
  5. Lattice-type self-support telecommunication towers are widely used in the communication infrastructure. In recent years, a lot of research has been conducted for the optimal design of this type of telecommunication tower. In general, the design optimization process of a Lattice-type self-support telecommunication tower is either costly or time-consuming, especially under uncertainty. This research focuses on the robust optimal design of pseudo-periodic lattice structures used as telecommunication towers including uncertainties due to dimensional and geometric uncertainties. Tower weight (directly connected with the tower cost), induced deflection due to equivalent static wind load (closely related to serviceability and function quality), and their sensitivities to variations in geometrical design variables are addressed as the main objectives of the optimal design process. An energy-based homogenized model for the structure considering the tapering angle is first derived and a closed-form solution is obtained which enables us to run hundreds of different designs within a second using generating algorithms. Buckling and maximum allowable stress are defined as constraints. Accordingly, the optimization design is formulated into a standard multi-objective optimization. Then a first-order sensitivity analysis is formulated to enhance the design robustness objectives. To solve the optimal design and the robust optimal problems, the Non-dominated Sorting Genetic Algorithm (NSGAII) is used. Pareto fronts for different heights are acquired and subsequently, the Technique for Order of Preference by Similarity to the Ideal Solution (TOPSIS) is used to find the best solution from the obtained Pareto front. Finally, to illustrate the capability of the proposed method, the obtained results of the optimal design and the robust optimal design are compared and discussed. © The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature 2024
  6. Keywords:
  7. Parameter effect analysis ; Robust optimal design ; Telecommunication tower ; Wind-induced deflection ; Deflection (structures) ; Shape optimization ; Structural optimization ; Wind stress ; Effects analysis ; Homogenization
  8. Source: International Journal on Interactive Design and Manufacturing ; Volume 19 , 2024 , pages 5857–5874 ; 19552513 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s12008-024-02175-5