Reliability-Based Design Optimization of Wind Turbine Systems

2018 ◽  
pp. 1-45 ◽  
Author(s):  
Weifei Hu
Keyword(s):  
Wind Turbine ◽  
Design Optimization ◽  
Reliability Based Design Optimization ◽  
Reliability Based Design

scholarly journals Reliability-based design optimization of offshore wind turbine support structures using analytical sensitivities and factorized uncertainty modeling

2019 ◽  
Author(s):  
Lars Einar S. Stieng ◽  
Michael Muskulus
Keyword(s):  
Wind Turbine ◽  
Design Optimization ◽  
Optimization Methods ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
High Fidelity ◽  
Reliability Based Design Optimization ◽  
Support Structure ◽  
Reliability Based Design ◽  
Gradient Based

Abstract. The need for cost effective support structure designs for offshore wind turbines has led to continued interest in the development of design optimization methods. So far, almost no studies have considered the effect of uncertainty, and hence probabilistic constraints, on the support structure design optimization problem. In this work, we present a general methodology that implements recent developments in gradient-based design optimization, in particular the use of analytical gradients, within the context of reliability-based design optimization methods. By an assumed factorization of the uncertain response into a design-independent, probabilistic part and a design-dependent, but completely deterministic part, it is possible to computationally decouple the reliability analysis from the design optimization. Furthermore, this decoupling makes no further assumption about the functional nature of the stochastic response, meaning that high fidelity surrogate modeling through Gaussian process regression of the probabilistic part can be performed while using analytical gradient-based methods for the design optimization. We apply this methodology to several different cases based around a uniform cantilever beam and the OC3 Monopile and different loading and constraints scenarios. The results demonstrate the viability of the approach in terms of obtaining reliable, optimal support structure designs and furthermore show that in practice only a limited amount of additional computational effort is required compared to deterministic design optimization. While there are some limitations in the applied cases, and some further refinement might be necessary for applications to high fidelity design scenarios, the demonstrated capabilities of the proposed methodology show that efficient reliability-based optimization for offshore wind turbine support structures is feasible.

Reliability-based design optimization of monopile transition piece for offshore wind turbine system

2014 ◽  
Vol 71 ◽  
pp. 729-741 ◽  
Author(s):  
Yeon-Seung Lee ◽  
Byung-Lyul Choi ◽  
Ji Hyun Lee ◽  
Soo Young Kim ◽  
Soonhung Han
Keyword(s):  
Wind Turbine ◽  
Design Optimization ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Reliability Based Design Optimization ◽  
Reliability Based Design ◽  
Wind Turbine System ◽  
Transition Piece
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