【摘要】 以优化聚酰胺6/玻璃纤维（PA6/GF30）进气歧管的翘曲变形来改善歧管的进气性能为目标，利用BoxBenhnken设计响应曲面试验，再构建随机森林回归模型，并以响应曲面实验所得数据为原始数据进行寻优预测。最后，通过Moldflow和Ansys联合仿真对歧管的进气过程进行模拟。结果表明，歧管的翘曲变形量的预测值与实际值拟合度较高，说明随机森林回归模型是有效的；优化后的歧管翘曲变形量由原来的1.413 mm下降到1.032 mm，下降了27%，进气流量的偏差率和不均匀度分别由原来的[-3.944 153 2%,3.554 111%]、7.498 3%下降到[-2.545 082 2%,1.697 694 7%]、4.242 8%，其进气性能得到明显改善。更多还原

【Abstract】 Aiming at optimizing the warpage deformation of PA6/GF30 intake manifold to improve the air intake performance of the manifold, a response surface experiment was designed by using Box-Benhnken, and then a random forest regression model was constructed. The data obtained from the response surface experiment were used as the original data for optimal prediction. The results indicated that the predicted values of the warpage deformation of the manifold exhibited a good fit with the actual values, suggesting that the random forest regression model was effective. The air intake process of the manifold was simulated by means of the Moldflow-Ansys joint simulation. The simulation results showed that the warpage deformation of the optimized manifold decreased from 1. 413 mm to 1. 032 mm, which was reduced by 27 %. The deviation rate and unevenness of the intake air flow decreased from 7. 498 3 % to 4. 242 8 % with [-3. 944 153 2 %, 3. 554 111 %] and [-2. 545 082 2 %, 1. 697 694 7 %], respectively, indicating a significant improvement in air intake performance.更多还原