Optimization and reliability problems in structural design of wind turbines

2007 ◽  
pp. 13-24
Keyword(s):  
Wind Turbines ◽  
Structural Design

Influence of structural design variations on economic viability of offshore wind turbines: An interdisciplinary analysis

2020 ◽  
Vol 145 ◽  
pp. 1348-1360 ◽  
Author(s):  
Clemens Hübler ◽  
Jan-Hendrik Piel ◽  
Chris Stetter ◽  
Cristian G. Gebhardt ◽  
Michael H. Breitner ◽  
...  
Keyword(s):  
Wind Turbines ◽  
Structural Design ◽  
Offshore Wind ◽  
Economic Viability ◽  
Offshore Wind Turbines

Field Testing of a Wind Turbine Tubular Tower and Structural Design of a Space Frame Steel Tower

2013 ◽  
Vol 405-408 ◽  
pp. 1077-1084 ◽  
Author(s):  
Xiang Yang Wang ◽  
Kao Shan Dai ◽  
Yi Chao Huang
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Structural Design ◽  
Field Testing ◽  
Structural Vibrations ◽  
Space Frame ◽  
Wind Turbine Tower ◽  
Extreme Wind ◽  
Wind Events ◽  
Supporting Structures

Wind energy industry has been growing tremendously in recent years. Tubular steel towers are currently dominant supporting structures for wind turbines. With the increase of the converter capacity, there is a great demand for higher supporting towers. However, structural vibrations in extreme wind events tend to become a major concern during tower design. To study wind turbine tower dynamics, an existing tubular steel tower was tested. Vibrational frequencies and damping ratios were identified. To avoid unexpected dynamic problems, a space frame steel tower has been proposed for supporting larger wind turbines. It is a structural system that can be assembled on-site by using prefabricated beams, columns, and brace members. A typical space frame steel tower was designed in this paper. Static loading, modal and buckling analyses of the tower were presented. It is expected to introduce engineers and designers more options for wind turbine tower design.

Structural Design and Analysis of Offshore Wind Turbines from a System Point of View

2010 ◽  
Vol 34 (1) ◽  
pp. 85-107 ◽  
Author(s):  
Francesco Petrini ◽  
Sauro Manenti ◽  
Konstantinos Gkoumas ◽  
Franco Bontempi
Keyword(s):  
Wind Turbines ◽  
Structural Design ◽  
Point Of View ◽  
Offshore Wind ◽  
Offshore Wind Turbines ◽  
System Point

scholarly journals Combined preliminary-detailed design of wind turbines

2016 ◽  
Author(s):  
Pietro Bortolotti ◽  
Carlo L. Bottasso ◽  
Alessandro Croce
Keyword(s):  
Wind Turbines ◽  
Structural Design ◽  
Tip Clearance ◽  
Full Account ◽  
Control Laws ◽  
Cost Of Energy ◽  
Holistic Optimization ◽  
The Cost ◽  
Tower Height ◽  
First Time

Abstract. This paper is concerned with the holistic optimization of wind turbines. A new procedure is presented that marries for the first time the overall sizing of the machine in terms of rotor diameter and tower height (often termed preliminary design), with the detailed sizing of its aerodynamic and structural components. The proposed combined preliminary-detailed approach sizes the overall machine, while taking into full account the subtle and complicated couplings that arise due to the mutual effects of aerodynamic and structural choices. As part of the approach, rotor and tower are sized simultaneously, even in this case capturing the mutual effects of one component over the other due to the tip clearance constraint. Result of the procedure, which is here driven by detailed models of the cost of energy, is a complete aero-structural design of the machine, including its associated control laws. The proposed methods are tested on the redesign of two wind turbines, a 2.2 MW onshore machine and a large 10 MW offshore one. In both cases, the optimization leads to significant changes with respect to the initial baseline configurations, with noticeable reductions in the cost of energy.

A Study on Structural Responses of Offshore Wind Turbines by Slamming Loads

2018 ◽  
Author(s):  
Byoungcheon Seo ◽  
Hyunkyoung Shin ◽  
Junbae Kim ◽  
Woorim Shim ◽  
Hyeonjeong Ahn ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Structural Design ◽  
Structural Damage ◽  
Large Scale ◽  
Offshore Structures ◽  
Offshore Wind ◽  
Offshore Wind Turbines ◽  
Design Life ◽  
Slamming Load

Offshore structures operating at sea are severely affected by slamming pressure. This slamming pressure significantly shortens the design life of offshore structures including offshore wind turbines and results in personal and material damage. This slamming load has to be fully considered in the design phase of the structure, and therefore good quality of experimental results should be supported. In Korea, offshore wind turbines have excellent conditions geographically. In the West sea, the construction of the jacket-type wind turbine is advantageous because the water depth is low, and in the East sea, which is relatively deep, the floating wind turbine is possible; thus, it is easy to generate a large-scale wind farm. For offshore wind turbines, several technical aspects should be considered. Among them, the damage of the structure caused by the slamming load should be studied. In the case of FOWTs operating in large waves, slamming can cause structural damage, and repeated slamming loads reduce the structural strength and shorten the design life. The slamming load should be calculated by applying the maximum peak, its width, duration and the dynamic load according to the natural period of the structure, and the importance of structural design. The results of the experiments can be used to determine the structural design, and the slamming load can be estimated to provide the design techniques offshore wind turbines as the design variables. In this study, we investigated experimentally the elastic effects of a cylindrical model on the slamming load characteristics by free drop test at height 1.0m and 1.7m.

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