Optimization of offshore wind turbine support structures using analytical gradient-based method

GSTDTAP > 气候变化

	Optimization of offshore wind turbine support structures using analytical gradient-based method
	Chew, Kok Hon; Tai, Kang; Ng, E.Y.K.; Muskulus, Michael
	2015
出版年	2015
语种	英语
国家	挪威
出版者	NTNU
领域	气候变化
英文摘要	Design optimization of the offshore wind turbine support structure is an expensive task; due to the highly-constrained, non-convex and non-linear nature of the design problem. This report presents an analytical gradient-based method to solve this problem in an efficient and effective way. The design sensitivities of the objective and constraint functions are evaluated analytically while the optimization of the structure is performed, subject to sizing, eigenfrequency, extreme load and fatigue load constraints. A case study is carried out for the OC4 jacket substructure to evaluate the method. Results shows that an optimal jacket design with 52 percent structural mass reduction is attained in 27 iterations, while satisfying all design constraints under the simplified load cases used. Besides, it is shown that the analytical sensitivity analysis is more accurate and efficient than the often used finite difference approximations. It can avoid numerical artifacts that typically occur in the analysis of extreme load constraint sensitivities.
URL	查看原文
来源平台	Center for International Climate and Environmental Research-Oslo (CICERO)
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/2113
专题	气候变化
推荐引用方式 GB/T 7714	Chew, Kok Hon,Tai, Kang,Ng, E.Y.K.,et al. Optimization of offshore wind turbine support structures using analytical gradient-based method:NTNU,2015.