基于温度曲线优化的复合材料固化温度和固化度协同控制

Synergistic Control of Curing Temperature and Curing Degree of Composite Materials Based on Temperature Curve Optimization

为降低复合材料固化过程中的最大温度梯度和最大固化度梯度,提高复合材料结构件的成型质量,提出基于温度曲线优化的复合材料固化温度和固化度协同控制方法。构建复合材料固化过程分析模型,以AS4/3501-6复合材料平板结构为算例,验证模型精度;选取试验样本点,建立试验样本,对广义回归神经网络进行训练和测试,建立复合材料固化过程近似模型;采用灰色关联分析,结合响应曲面法,对近似模型进行优化,求取优化后的设计变量及最大温度梯度和最大固化度梯度响应。对优化结果进行分析表明:与原设计相比,优化后的最大温度梯度下降了54.93%,最大固化度梯度下降了13.27%,提出的协同控制方法在复合材料固化过程的多目标、非均匀优化中具有显著效果。

In order to reduce the maximum temperature gradient and the maximum curing degree gradient in the curing process of composite materials and improve the molding quality of composite structural parts,a synergistic control method of curing temperature and curing degree of composite materials based on temperature curve optimization was proposed.The analysis model of curing process of composite materials was built,and the model accuracy was verified by taking AS4/3501-6 composite plate structure as an example.The test sample points were selected,the test samples were established,the generalized regression neural network was trained and tested,and an approximate model of the curing process of composite materials was established.Grey correlation analysis and response surface method were used to optimize the approximate model,and the optimized design variables,as well as responses of maximum temperature gradient and maximum curing degree gradient were obtained.The analysis of the optimization results shows that compared with the original design,the maximum temperature gradient and the maximum curing degree gradient after optimization have decreased by 54.93%and 13.27%,respectively.The proposed synergistic control method has remarkable effect in multi-objective and non-uniform optimization of the curing process of composite materials.