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为简化风力机叶片的建模和计算、提高效率,提出基于能量法的复合材料层合板性能参数等效方法。以材料的代表性体积单元RVE为研究对象,在能量法二维理论的基础上,根据RVE和均质等效体应力场与应变场在一定条件下相同的特点,利用变形能守恒理论,通过对不同形式变形能公式的变换,推导出层合板三维情况的性能等效刚度矩阵系数与RVE变形能的关系及等效矩阵的能量表达式。将该算法应用于[0°,±45°]三向层合板,计算结果与实测数据吻合。分别对1.5 MW叶片根部层合单元模型和等效模型进行结构分析和对比,结果表明二者数值吻合良好,验证了算法的可行性和有效性。
In order to simplify the modeling and calculation of wind turbine blades and improve the efficiency, a new equivalent method of performance parameters of composite laminates based on energy method is proposed. Based on the two-dimensional theory of energy method, based on the two-dimensional theory of energy method and based on the same characteristics of stress field and strain field under certain conditions of RVE and homogeneous equivalent body, RVE, which is a representative volume unit of material, For the transformation of different forms of deformation energy formulas, the relationship between the equivalent stiffness matrix coefficient and the RVE deformation energy and the energy expression of the equivalent matrix are deduced. The algorithm is applied to [0 °, ± 45 °] three-direction laminates, and the calculated results are in good agreement with the measured data. The structural analysis and comparison of the laminar unit model and equivalent model of the root of 1.5 MW blade were carried out. The results show that the two agree well with each other and the feasibility and effectiveness of the algorithm are verified.