采用数值仿真方法建立拉挤梁帽真空灌注成型工艺的优化流程,分析了工艺参数对成型效率和质量的影响。首先,实验测定纤维增强织物的渗透率、实际纤维体积分数和树脂的流变性。其次,采用收敛性分析方法对梁帽的数值模型进行优化,兼顾了仿真精度和效率。最后,研究了拉挤板排列间距和模腔内的残余空气压强对成型过程的影响。结果表明：仿真结果与全尺寸实验的偏差小于7%,拉挤板排列间距为0.3 mm 时充模效率最高,残余空气压强小于4000 Pa时产品孔隙率小于2%,证明了数值优化方法的可行性和准确性。
Abstract
The optimization process of vacuum infusion process to bond pultruded plates for spar cap manufacturing was established by numerical simulation, and the influence of process parameters on fabrication efficiency and quality was analyzed. Firstly, the permeability of fibrous fabrics, the fiber volume content and the temperature-viscosity relationship of the epoxy resin were determined experimentally. Then the numerical model of the spar cap was established, and the mesh size was determined by sensitivity analysis. Finally, the effects of pultruded plate arrangement spacing and residual vacuum pressure on the molding process were investigated parametrically. The results show that the deviation of the flow front position and mold filling time obtained from the simulation is less than 7% from the full-scale experiment. The mold filling efficiency is the highest when the spacing of the pultruded plate arrangement is 0.3 mm, and the porosity is less than 2% when the residual vacuum pressure is less than 4000 Pa, which proves the feasibility and accuracy of the numerical optimization method.
关键词
复合材料 /
风电叶片 /
数值优化 /
拉挤梁帽 /
真空辅助树脂灌注
Key words
composite materials /
wind turbine blades /
numerical analysis /
pultruded spar cap /
VARI
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基金
10 MW级风电机组用叶片拉挤主梁成型的关键技术研发（SBE2021080010）; 中央高校基本科研业务费（2019-JL-003）
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