Two-stage local optimization of lattice type support structures for offshore wind turbines

Schafhirt, Sebastian; Zwick, D.; Muskulus, Michael

doi:10.1016/j.oceaneng.2016.03.035

Cited by 17 publications

(11 citation statements)

References 7 publications

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“…As jackets gained in popularity, different gradient‐free methods have also been applied in the design thereof . A different approach to efficient optimization is shown in Schafhirt et al By using a two‐stage approach where the optimization of tube geometry and stress concentration factors (SCFs) are assumed independent of the structural analysis, the computational effort needed in the jacket optimization is greatly reduced.…”

Section: Introductionmentioning

confidence: 99%

On gradient‐based optimization of jacket structures for offshore wind turbines

et al. 2018

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Aims and ScopeWind power is one of the major energy resources that are important components of future energy scenarios. Wind Energy offers a major forum for the reporting of advances in this rapidly developing technology with the goal of realising the world-wide potential to harness clean energy from land-based and offshore wind. The journal aims to reach all those with an interest in this field from academic research, industrial development through to applications, including individual wind turbines and components, wind farms and integration of wind power plants. Contributions across the spectrum of scientific and engineering disciplines concerned with the advancement of wind power capture, conversion, integration and utilisation technologies are essential features of the journal.

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Section: Introductionmentioning

confidence: 99%

On gradient‐based optimization of jacket structures for offshore wind turbines

et al. 2018

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“…A comprehensive study of optimization with fatigue constraints is given in Oest. 15 Similar to the recent works, 6,7,13 this paper deals with gradient-based optimization of jackets under both ultimate and fatigue limit state constraints. However, since the methodology presented in this paper is based on a static analysis model instead of a quasi-static or dynamic, there are some important differences.…”

Section: Introductionmentioning

confidence: 94%

“…The most accurate analysis model is coupled aero‐servo‐hydro‐elastic simulations, run in the time domain for multiple hours. This approach was used for gradient‐free optimization in Schafhirt et al A common, but less accurate, approach is to use a decoupled model, where the rotor loads are extracted from an aero‐servo‐elastic software and subsequently applied to the structure. This approach was used for gradient‐based optimization in Oest et al for a quasi‐static analysis and in Chew et al for a dynamic analysis.…”

Section: Introductionmentioning

confidence: 99%

Conceptual jacket design by structural optimization

2018

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We present an approach for sizing optimization of jacket structures and apply it to investigate the conceptual design of jackets for offshore wind turbines. Conceptual design is an input to early structural and financial models, and we assume simplified analysis and load models. A four‐legged jacket for the DTU 10‐MW wind turbine in 50‐m water depth is modelled by Timoshenko beam finite elements, and the structural dimensions of the beam cross sections are considered as continuous design variables. A structural optimization problem is formulated to minimize the jacket mass, with constraints on fatigue and ultimate limit states. The optimal design problem is then used to investigate how the optimized mass depends on the number of bays and the jacket leg distance. The conceptual design investigation led to a new conceptual design with 14% lower mass compared with the original conceptual design. We conclude that structural optimization can provide useful insights in the conceptual design phase and lead to a better starting point for the further design and planning processes.

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“…В зарубежной практике изучением работы башенных сооружение занимались следующие ученые: A. Khokakaki [13], а также ряд других ученых по всему миру [14][15][16][17][18][19].…”

Section: обзор опыта проектирования башен сотовой связиunclassified

Determination of the rational constructive form of cellular communication towers

Golikov

Владимирович²,

Михальчонок

et al. 2019

Vestn. Ross. univ. družby nar., Ser. Inž. issled.

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The need for reliable supports for locating and maintaining the equipment of cellular opera-tors is increasing every year. The classic version of the supports are lattice towers. At present, optimization of the parameters of lattice towers, which is one of the ways to improve the efficiency of their design and construction, is of great importance. The purpose of the work is chosen definition of a rational constructive form of lattice cellular communication towers. In the work, the calculation and analysis of the tower supports of a prismatic and pyramidal form are made with varying basic geometric parameters of the structure and the ratio of parameters between them. To create basic dependencies, numerical modeling methods are used. According to the results of a critical analysis of the literature on the calculation of lattice supports of high-rise buildings, the absence of recommended optimal values of the geometric parameters of structures and the relationship between them was established. The stress-strain state of the design models of lattice towers of a prismatic and pyramidal shape was assessed with variation of the main overall geometric parameters of the structures. To achieve the goal of finding a rational structural form of lattice supports, two rationalization criteria have been tested and applied - the simultaneous fulfillment of the requirements of both limiting states and minimization of the mass of the structure. The results of the study of lattice tower supports are presented in dimensionless parameters, which can be applied by the engineer when assigning the overall dimensions of the structure at the initial design stage.

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Two-stage local optimization of lattice type support structures for offshore wind turbines

Cited by 17 publications

References 7 publications

On gradient‐based optimization of jacket structures for offshore wind turbines

On gradient‐based optimization of jacket structures for offshore wind turbines

Conceptual jacket design by structural optimization

Determination of the rational constructive form of cellular communication towers

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