基于等效面的风力机超长柔性叶片结构响应研究

For the structural response prediction of ultra-large, hundred-meter-scale flexible wind turbine blades, an equivalent plate model based on the blade section chord line is proposed to describe the wind turbine blade. Based on this equivalent plate model, research is conducted on the equivalence of aerodynamic loads and structural deformations. An equivalent aerodynamic force chordwise distribution calculation method is developed based on Blade Element Momentum theory. Structurally, the blade’s thickness, density, and stiffness distributions are characterized using multiple sectional feature parameters. This approach significantly reduces computational complexity and degrees of freedom while ensuring the accuracy of the global dynamic characteristics of the model. The results demonstrate that the equivalent aerodynamic loads and equivalent structural responses exhibit high accuracy in validation comparisons, making this method suitable for static and dynamic response analysis of wind turbine blades. This provides a novel computational framework for studying the dynamic response of hundred-meter-scale wind turbine blades.