克里金模型用于预测聚能射流速度的方法研究  

Study on the Jet Velocity Prediction Method Based on the Kriging Model

作　　者：雷婧宇 王利侠[1] 寇鹏飞 薛标 LEI Jing-yu;WANG Li-xia;KOU Peng-fei;XUE Biao(Xi'an Modern Chemistry Research Institute,Xi'an 710065,China)

机构地区：[1]西安近代化学研究所,陕西西安710065

出　　处：《火炸药学报》2022年第5期730-734,共5页Chinese Journal of Explosives & Propellants

摘　　要：为了快速预测聚能装药射流速度,减少数值模拟的计算成本,构建了自适应克里金模型,通过少量的数值模拟结果,对参数在一定范围内的聚能装药射流速度进行了预测。在Matlab平台中,以药型罩锥角、罩壁厚、装填炸药参数作为输入值、射流速度作为输出值,构建了自适应克里金模型,通过学习函数反复加入训练样本,直至模型收敛,实现了对测试样本射流速度的预测。为了验证所建立克里金模型的准确度,将其预测结果与数值模拟结果进行了对比。结果表明,克里金模型对聚能射流速度的预测结果与数值模拟结果之间的误差小于2%,说明所构建的自适应克里金模型能够在保证计算精度的情况下,实现在不同炸药装药、不同药型罩参数的条件下,对聚能射流速度的快速预测,该方法能够兼顾预测精度和计算成本,并提高其计算效率。In order to quickly predict the jet velocity and reduce the computational cost of designing the shaped charge,an adaptive Kriging model was developed.A few numerical simulations were performed to predict the jet velocities of the shaped charges with parameters limited to a particular range.Based on the Matlab platform,with cone angle,liner wall thickness and packed explosive as input and jet velocity as output,the adaptive Kriging model was constructed to predict the jet velocities of test samples.The learning function was employed to update the training samples until the Kriging model converged.The relative errors between the predictions from the Kriging model and the results from numerical simulations were calculated to validate the accuracy of the constructed Kriging model.The results show that the errors of the predicted results and the numerical calculated results are less than 2%,indicating that the constructed adaptive Kriging model can predict the jet velocities of shaped charges for different cone angles,liner wall thicknesses,and packed explosives with guaranteed prediction accuracy.The prediction method provides an excellent balance between prediction accuracy and computational cost,and improves the computational efficiency in the structure design of the shaped charge.

关 键 词：自适应克里金模型 聚能装药 射流速度 预测方法 有限元软件 数值模拟 

分 类 号：TJ410.6[兵器科学与技术—火炮、自动武器与弹药工程]