A procedure for the size, shape and topology optimization of transmission line tower structures

Souza, Rafael Rodrigues de; Miguel, Leandro Fleck Fadel; López, Rosalía Rodríguez; Miguel, Letícia Fleck Fadel; Torii, André Jacomel

doi:10.1016/j.engstruct.2015.12.005

Cited by 49 publications

(19 citation statements)

References 27 publications

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“…These objectives are suited to topology optimisation (TO), a computer-aided design (CAD) technique. TO has been used previously for designing minimal weight structures [7][8][9] where low mass is critical to high component performance in the end-use application (e.g., in saving fuel [7,9], increasing stability, and decreasing cost [8]). The effectiveness of TO techniques are often limited by conventional manufacturing techniques due to the complex natural form of the resulting geometry, making the optimal design un-manufacturable.…”

Section: Introductionmentioning

confidence: 99%

Design & Manufacture of a High-Performance Bicycle Crank by Additive Manufacturing

McEwen

Cooper²,

Warnett

et al. 2018

Applied Sciences

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A new practical workflow for the laser Powder Bed Fusion (PBF) process, incorporating topological design, mechanical simulation, manufacture, and validation by computed tomography is presented, uniquely applied to a consumer product (crank for a high-performance racing bicycle), an approach that is tangible and adoptable by industry. The lightweight crank design was realised using topology optimisation software, developing an optimal design iteratively from a simple primitive within a design space and with the addition of load boundary conditions (obtained from prior biomechanical crank force–angle models) and constraints. Parametric design modification was necessary to meet the Design for Additive Manufacturing (DfAM) considerations for PBF to reduce build time, material usage, and post-processing labour. Static testing proved performance close to current market leaders with the PBF manufactured crank found to be stiffer than the benchmark design (static load deflection of 7.0 ± 0.5 mm c.f. 7.67 mm for a Shimano crank at a competitive mass (155 g vs. 175 g). Dynamic mechanical performance proved inadequate, with failure at 2495 ± 125 cycles; the failure mechanism was consistent in both its form and location. This research is valuable and novel as it demonstrates a complete workflow from design, manufacture, post-treatment, and validation of a highly loaded PBF manufactured consumer component, offering practitioners a validated approach to the application of PBF for components with application outside of the accepted sectors (aerospace, biomedical, autosports, space, and power generation).

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Section: Introductionmentioning

confidence: 99%

Design & Manufacture of a High-Performance Bicycle Crank by Additive Manufacturing

McEwen

Cooper²,

Warnett

et al. 2018

Applied Sciences

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“…For a more detailed description of the BSA, the reader is referred to Civicioglu (2013) and Souza et al (2016) 1. Initialization Do Generation of the Perturbed/Trial Population 2.…”

Section: Problem Formulationmentioning

confidence: 99%

“…The selection of the BSA was mainly based on two aspects: (a) it was shown to outperform several algorithms in unconstrained optimization (Civicioglu, 2013) and presented promising results for the optimization of transmission line towers structures, studied by Souza et al (2016); (b) it has only one parameter to be set, different from other metaheuristic algorithms. Indeed, one of the main drawbacks of metaheuristic algorithms is that their efficiency depends on the tuning of many parameters usually by trial and error (Lopez et al 2009a, Lopez et al 2009b).…”

Section: Introductionmentioning

confidence: 99%

A Backtracking Search Algorithm for the Simultaneous Size, Shape and Topology Optimization of Trusses

Souza

Miguel

López

et al. 2016

Lat. Am. j. solids struct.

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This paper presents a Backtracking Search Optimization algorithm (BSA) to simultaneously optimize the size, shape and topology of truss structures. It focuses on the optimization of these three aspects since it is well known that the most effective scheme of truss optimization is achieved when they are simultaneously considered. The minimization of structural weight is the objective function, imposing displacement, stress, local buckling and/or kinematic stability constraints. The effectiveness of the BSA at solving this type of optimization problem is demonstrated by solving a series of benchmark problems comparing not only the best designs found, but also the statistics of 100 independent runs of the algorithm. The numerical analysis showed that the BSA provided promising results for the analyzed problems. Moreover, in several cases, it was also able to improve the statistics of the independent runs such as the mean and coefficient of variation values.

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“…To sum up, the related literature review highlights the lack of recent methodological innovation capable of supporting the development of alternative design of pylons, with an enhanced visual quality. The current design method is based on the optimization of reticular structures (or trusses) made of galvanized steel [20][21][22][23][24], focusing on the reduction of the cost of material, transportation, erection, and maintenance. An interesting approach to topology in the pylon design is presented in [25].…”

mentioning

confidence: 99%

“…In the following subparagraphs, a list of suggested criteria for landscape subdivision is proposed, whose resulting symbols are summed up and listed in Table 2. According to the results reported in [24], a better correspondence between the identified shapes and the citizens' requirements can be obtained by involving local residents in participatory design activities [37][38][39]. A survey was conducted among 120 people between the ages of 18 and 65, divided into 54 men and 66 women, from different social backgrounds who live in the Abruzzo region and equally distributed throughout the whole territory.…”

mentioning

confidence: 99%

Design for Visual Quality Enhancement of Artificial Infrastructure Facilities: An Application to Electricity Pylons

et al. 2020

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(1) Background: The visual impact of artificial infrastructures on natural landscapes generates a common negative perception in public opinion. However, as in the case of electrical energy, the increasing demand for power supply and its need for capillary distribution require the installation of new lines, commonly overhead lines with tall tower-like pylons. In most countries, this situation is faced with many attempts of solutions, as participatory workshops and design contests. Nevertheless, the solutions are usually not further developed into real structures due to many limitations (e.g., regulatory, safety, lack of feasibility). (2) Methods: This paper presents a systematic method for the design of tower-like pylons (e.g., electric ones) able to improve the visual quality on the landscape areas in which they will be installed. The method identifies a design strategy that advantageously exploits the inevitable visual impact of pylons on the landscape by integrating the symbolic morphology and the topologically optimized pylon structure from the earliest design phases. (3) Results: The resulting structure is designed in three steps. First, a concept is morphologically developed by integrating symbolic references to the landscape, environment, or cultural society. Second, the concept is topologically optimized, by reducing the structural weight and its visual impact, and respecting regulatory requirements. Third, the resulting structure is engineered and embodied into an industrially feasible layout. (4) Conclusions: The method is able to develop an original, brand new tower-like pylon integrating all the types of requirements, such as regulatory, industrial feasibility, and social components’ needs. The resulting electricity pylon presents an enhanced visual quality according to the citizens’ feedback.

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A procedure for the size, shape and topology optimization of transmission line tower structures

Cited by 49 publications

References 27 publications

Design & Manufacture of a High-Performance Bicycle Crank by Additive Manufacturing

Design & Manufacture of a High-Performance Bicycle Crank by Additive Manufacturing

A Backtracking Search Algorithm for the Simultaneous Size, Shape and Topology Optimization of Trusses

Design for Visual Quality Enhancement of Artificial Infrastructure Facilities: An Application to Electricity Pylons

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