考虑重力的风机叶片水平加载测试方法

Effects of Gravity in Horizontal Loaded Static Test for Wind Turbine Blade

在风电叶片三维有限元参数模型中引入了重力产生的附加载荷,仿真计算了风电叶片水平加载方式的静载荷测试中附加载荷产生的水平方向的耦合位移,分析了耦合位移对测试过程中理论计算结果的影响;由于重力的叠加效应,测试中某些截面实际施加的等效载荷可能远超叶片设计的目标测试载荷,建议联合有限元分析,优化叶片安装角度和加载力方向的方法,降低叶片局部截面实际施加等效载荷的过载峰值。

Both of the attaching loads and the coupling displacements of gravity in horizontal loaded static test for wind turbine blade is analyzed in this paper. The numerical results show that the superimposition of gravity has great effect on the measured values, which lead to the risk of overloading the target load in some section. In order to reduce the overloading peak value of the equivalent load , it is suggested that the comprehensive application of optimizing in- stallation angle of the blade and loading direction should be used based on FEM.