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提出了基于频率控制的多约束单管型风电塔优化方法.塔架简化成悬臂梁结构,其横截面参数作为设计变量,以最小化材料体积为目标函数,按照将塔架设计成刚-刚或刚-柔或柔-柔不同类型的要求设定塔架的固有频率约束,采用专业软件Bladed计算风荷载,按照风电塔规范考虑强度、稳定性和疲劳等约束,这使得优化结构更符合实际设计.考虑到采用Bladed荷载计算工作量很大,整个优化过程分为几个阶段,在每个阶段的开始,以前一个阶段的优化设计作为初始设计,并重新计算结构荷载,在该阶段内于固定荷载下用移动渐近线法(MMA)求解优化问题改进设计,所需的固有频率、强度及疲劳约束灵敏度采用解析法获得.对一现有塔架进行优化以说明方法的有效性.根据塔架固有频率和风机工作转速之间的关系,发展了高风电塔的分类.在此基础上,结合提出的优化方法,可以帮助设计者判定在指定高度和机型下哪种类型塔架更合适,为塔架概念设计提供有价值的参考.
The optimization method of multi-constrained single-tube wind power tower based on frequency control is proposed.The tower is simplified into cantilever structure, the cross-section parameters of which are used as design variables, the objective function is to minimize the volume of material, Or rigid-flexible or soft-flexible requirements of the tower to set the natural frequency constraints, the use of professional software Bladed calculate the wind load, wind power tower specifications to consider the strength, stability and fatigue constraints, which makes the optimal structure more in line with the actual Design Considering the heavy load involved in Bladed load calculation, the entire optimization process is divided into several phases. At the beginning of each phase, the optimization design of the previous phase is used as the initial design and the structural load is recalculated. Solving Optimization Problems with Moving Asymptotic Method (MMA) at Fixed Loads Improved design, required natural frequency, strength, and fatigue constraint sensitivity were obtained analytically. An existing tower was optimized to demonstrate the effectiveness of the method. Based on The relationship between the natural frequency of the tower and the working speed of the wind turbine has been developed and the classification of the high wind power tower has been developed.On this basis, combining the proposed optimization methods, it can help to design Judge which type of tower is more suitable under the specified altitude and model, which provides valuable reference for the conceptual design of the tower.