离散元法
故障排除
计算机科学
计算
粒状材料
人工神经网络
卷积神经网络
鼓
软件
人工智能
粒子(生态学)
模拟
算法
计算科学
机械
工程类
机械工程
物理
地质学
岩土工程
操作系统
海洋学
程序设计语言
作者
Liqiang Lu,Xi Gao,Jean-François Dietiker,Mehrdad Shahnam,William A. Rogers
标识
DOI:10.1016/j.ces.2021.116832
摘要
Granular flows are widely encountered in many industrial processes and natural phenomena. Discrete Element Modeling (DEM) is a useful tool for understanding and troubleshooting devices processing granular materials. However, its applicability is significantly limited by the huge computational cost associated with detecting and computing collisions. In this research, the computation speed of DEM was accelerated by orders of magnitude using a convolutional neural network to replace the direct calculation of particle–particle and particle-boundary collisions. The MFiX software was used to generate the training and testing dataset. A GPU accelerated TensorFlow model was used to train the neural network and test the results. The model fluctuations caused by different training steps were reduced with a multi-scale loss function. The accuracy was improved with more frames within one training step. The modeling of a rotating drum and a hopper demonstrated the accuracy and efficiency of this machine learning accelerated DEM in the simulation of granular flows.
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