基于风力机整机气弹稳定性的塔筒结构优化

Structural optimization of tower based on aeroelastic stability of the whole wind turbine

基于风力机整机的稳定性,提出了一种研究风力机塔筒结构优化的新方法。该方法以减小系统振动为目标函数,塔筒的直径和壁厚为优化参数,通过强度、变形量及质量等作为约束条件建立优化模型,利用内点惩罚函数法求解此优化问题,最后运用坎贝尔图(Campbell图)对叶片与塔筒耦合的风力机整机系统的稳定性进行分析。应用此方法对某2MW水平轴风力机塔筒结构进行优化,整机的稳定性能得到很大改善,塔筒质量减少13%,具有一定的理论和工程实用价值。

In order to improve the stability of whole wind turbine system with blade and tower coupled,a new method,which constructs and solves optimization model to optimize the structure of wind turbine,is developed.The method takes minimizing system vibration as the objective function,and diameter and thickness of tower as decision variables.It constructs optimization model using strength,deformation and mass,etc.,as constraints.Interior penalty function technique is applied to solve the optimization model,and Campbell diagram is employed to analyze the system stability.The formulation and solution method are applied to a 2 MW horizontal axis wind turbine,and the stability of the whole turbine is greatly improved and tower mass is reduced by 13%,which demonstrates the proposed method not only contributes to theory research but also leads to great benefits in practice.