基于塑性损伤模型的某低强风电机组基础加固方案优化设计

OPTIMIZATION DESIGN OF FOUNDATION REINFORCEMENT SCHEME FOR LOW STRENGTH WIND TURBINE BASED ON PLASTIC DAMAGE MODEL

针对风电机组基础加固缺少精确理论分析的问题,以某风场项目为例,通过ABAQUS三维有限元分析软件,采用塑性损伤模型模拟不同方案的加固效果,以期为实际风电机组基础加固设计提供理论支撑。通过对比分析不同尺寸环梁加固后基础的最大应力、损伤程度以及钢筋应力的变化,结果表明:增加环梁高度能有效提高基础结构承载力,增加环梁宽度能在一定程度上提高基础结构承载力,当环梁高度为1.2 m,宽度为0.6 m时加固效果最优,并在实际工程中得到验证。建议加固设计时采用有限元方法对不同加固方案进行模拟,比较加固效果,确定最优加固方案。

In this paper,one of the foundations of wind turbine in a wind farm is taken as an example.Through ABAQUS threedimensional finite element analysis software,the plastic damage model is used to simulate the reinforcement effect of different schemes,which provides theoretical support for the foundation reinforcement design of actual wind turbine.By comparing and analyzing the changes of maximum stress,damage degree and reinforcement stress of foundation after reinforcement of ring beam with different sizes,it is found that increasing the height of ring beam can effectively improve the bearing capacity of foundation structure,and increasing the width of ring beam can improve the bearing capacity of foundation structure to a certain extent.When the height of ring beam is 1.2 m and the width is 0.6 m,the reinforcement effect is the best which is verified in practical engineering.It is suggested that the finite element method should be used to simulate different reinforcement schemes,compare the reinforcement effects and determine the optimal reinforcement scheme.