激光参数对DP780双相钢/PA66碳纤维界面宽度的影响及其预测模型  

Influence of laser parameters on the steel/CFRP interface width and its predictive modeling

作　　者：贺赵国 周惦武[1] 邓乔 杨佳豪 王新宇 HE Zhaoguo;ZHOU Dianwu;DENG Qiao;YANG Jiahao;WANG Xinyu(State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle,Hunan University,Changsha,410082,China;Shenzhen Rapid Parts Solutions Company,Shenzhen,518000,China)

机构地区：[1]湖南大学,整车先进设计制造技术全国重点实验室,长沙410082 [2]深圳阿尔比斯科技有限公司,深圳518000

出　　处：《焊接学报》2025年第2期36-45,共10页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51674112)。

摘　　要：钢/碳纤维激光直接连接界面的粘接效果与碳纤维的熔融宽度密切相关,而激光热输入是影响其熔融宽度的主要因素.文中进行了DP780钢/PA66碳纤维激光直接连接试验,基于多层感知机和支持向量机探索了碳纤维熔化宽度的BP神经网络预测模型,并利用AOA算法优化了BP神经网络.同时研究了激光参数中光束扫描速率、离焦量和激光功率对熔化宽度的影响,并计算了激光的能量密度.结果表明,通过AOA算法优化的BP神经网络,其训练集、测试集和验证集的相关系数R分别为0.96296,0.97009和0.98828,表明AOA-BP预测模型具有良好的预测精度和泛化能力.此外,响应曲面的分析结果指出,激光参数对碳纤维熔融宽度的影响权重从大到小依次为光束扫描速率、离焦量和激光功率.离焦量正向的增大可以使激光能量分布更加平缓,扩大光束能量的覆盖范围.The steel/CFRP interface bonding is determined by the melting width of CFRP in the direct steel/CFRP laser joining,while laser heat input is the major factor affecting the melting width.In this paper,the experiment of steel/CFRP direct laser joining was conducted and a BP neural network prediction model of the CFRP melting width was explored based on MLP and SVM,and the BP neural network was optimized by the AOA algorithm.Meanwhile,based on the RSM analysis,the weights of beam scanning rate,defocusing and laser power on the melting width were studied,and laser energy density distribution was calculated.The results indicate that the related coefficients R in the training,test and validation set of AOA-BP neural network are 0.96296,0.97009,0.98828,respectively,which means that the established AOA-BP prediction model exhibits well prediction accuracy and generalization capability.Furthermore,the results of RSM reveal that the descending order of the weights of laser parameters influencing the melting width is as follows:beam scanning rate,defocusing,and laser power.The increase in defocusing serves to flatten the laser energy density distribution,expanding the coverage area of beam energy.

关 键 词：钢/碳纤维连接 优化神经网络 激光能量密度 

分 类 号：TG460[金属学及工艺—焊接]