大连理工大学学报2016，Vol.56Issue(6)：551-560,10.DOI:10.7511/dllgxb201606001
基于频率控制的多约束风电塔优化方法
Frequency-based optimization method for wind turbine tower under multiple constraints
摘要
Abstract
A frequency-based optimization method for single tubular wind turbine tower under multiple constraints is proposed.The cross section parameters of tower are design variables,and minimizing the material volume of tower,which is considered as a cantilever structure is objective function.The natural frequencies of tower are constrained to ensure the tower being stiff-stiff or stiff-soft or soft-soft design.The wind loads are calculated by commercial software Bladed,and according to specification of wind turbine tower,the strength,stability and fatigue are included in constraints, these factors make the optimum structure conform to the practical design.Since the load evaluation by Bladed is very costly,the whole optimization process is broken into several stages.At the beginning of each stage optimization starts by using the previous optimum design as its initial design and the wind load of the initial tower design is recalculated.In each stage,optimization problem is solved by method of moving asymptotes (MMA)under the fixed wind load,and the sensitivities of the natural frequency,strength and fatigue constraints with respect to design variables are obtained by analytical method.A numerical example for improving the existing tower design demonstrates the optimization method.Furthermore, a classification of high wind turbine tower is developed based on the relationship between tower natural frequency and working frequency range of the wind turbine to be installed.By the above optimization method,it can help to decide that which type of the tower design is the potentially optimum candidate for specific height and turbine,and provide valuable suggestions for optimum design during concept design stage for wind turbine tower.关键词
风电塔/优化设计/多约束Key words
wind turbine tower/optimization design/multiple constraints分类
建筑与水利引用本文复制引用
程耿东,徐向东,刘晓峰..基于频率控制的多约束风电塔优化方法[J].大连理工大学学报,2016,56(6):551-560,10.基金项目
国家自然科学基金资助项目(11332004). （11332004）
