中国机械工程 ›› 2026, Vol. 37 ›› Issue (2): 466-475.DOI: 10.3969/j.issn.1004-132X.2026.02.021
• 先进材料加工工程 • 上一篇
收稿日期:2024-12-02
出版日期:2026-02-25
发布日期:2026-03-13
通讯作者:
段国林
作者简介:王世杰,男,1995年生,博士研究生。研究方向为数字化设计与制造。E-mail:leonhebut@163.com基金资助:Received:2024-12-02
Online:2026-02-25
Published:2026-03-13
Contact:
DUAN Guolin
摘要:
高精度的计算流体力学表征模型会带来极高的时间成本,这给具有高频次复杂梯度变化的功能梯度材料零件的表征带来挑战。建立了以贝叶斯正则化神经网络为预测模型的时变挤出系统,首先通过高精度的计算流体动力学仿真模型获取数据集并用于训练神经网络模型,将材料目标比例、料腔中初始比例、双进料口流量总和以及适配的螺杆转速作为输入参数,标记交付延迟时间以及过渡延迟时间作为输出参数,再将训练后贝叶斯正则化神经网络融合经典控制理论对系统描述的方法构建完整的时变挤出系统。最后通过打印功能梯度材料样件验证了所构建的计算流体动力学仿真模型以及时变挤出系统的准确性与适用性。
中图分类号:
王世杰, 段国林. 直写成形工艺制备的功能梯度材料零件时变挤出系统建模[J]. 中国机械工程, 2026, 37(2): 466-475.
WANG Shijie, DUAN Guolin. Modelling of Time-varying Extrusion Systems for Fabrication of FGMs Parts by Direct Ink Writing Processes[J]. China Mechanical Engineering, 2026, 37(2): 466-475.
| 名称 | 数值 | 名称 | 数值 |
|---|---|---|---|
| 螺杆长度/mm | 60 | 销钉高度/mm | 1 |
| 螺杆大径/mm | 8 | 输入口直径/mm | 2 |
| 螺杆小径/mm | 6 | 挤出口直径/mm | 0.5 |
| 螺距/mm | 8 | 收缩角度/(°) | 65 |
| 螺槽高度/mm | 1 | 收缩段大径/mm | 8 |
| 螺槽宽度/mm | 7 | 成形段长度/mm | 6 |
| 螺杆转速(r·min | 21~45 | 进料口速率和(mm·s | 0.4~1 |
表1 混料系统结构参数
Tab.1 Mixing system structural parameters
| 名称 | 数值 | 名称 | 数值 |
|---|---|---|---|
| 螺杆长度/mm | 60 | 销钉高度/mm | 1 |
| 螺杆大径/mm | 8 | 输入口直径/mm | 2 |
| 螺杆小径/mm | 6 | 挤出口直径/mm | 0.5 |
| 螺距/mm | 8 | 收缩角度/(°) | 65 |
| 螺槽高度/mm | 1 | 收缩段大径/mm | 8 |
| 螺槽宽度/mm | 7 | 成形段长度/mm | 6 |
| 螺杆转速(r·min | 21~45 | 进料口速率和(mm·s | 0.4~1 |
| 材料 | 稠度系数 | 量纲一流性系数 |
|---|---|---|
| A | 59.59 | 0.31 |
| B | 67.68 | 0.32 |
表2 材料流变特性参数
Tab.2 Material rheological parameters
| 材料 | 稠度系数 | 量纲一流性系数 |
|---|---|---|
| A | 59.59 | 0.31 |
| B | 67.68 | 0.32 |
| 神经元 | 输入层 节点1 | 输入层 节点2 | 输入层 节点3 | 输入层 节点4 | 偏置 |
|---|---|---|---|---|---|
| 1 | 0.0462 | 0.0087 | 0.0624 | 0.1695 | |
| 2 | 0.9686 | 0.3219 | 0.6197 | ||
| 3 | 0.0461 | 0.0086 | 0.0621 | 0.1688 | |
| 4 | 0.037 | ||||
| 5 | 0.0231 | 0.003 | 0.0231 | 0.0666 | |
| 6 | 0.786 | 0.1731 | 0.5943 | 0.4138 | |
| 7 | 0.0463 | 0.0087 | 0.0624 | 0.1696 | |
| 8 | 0.101 | ||||
| 9 | 0.0457 | 0.0083 | 0.0606 | 0.1652 | |
| 10 | 0.037 |
表3 输入层-隐藏层神经元权重与偏置
Tab.3 Input layer-hidden layer neuron weights and bias
| 神经元 | 输入层 节点1 | 输入层 节点2 | 输入层 节点3 | 输入层 节点4 | 偏置 |
|---|---|---|---|---|---|
| 1 | 0.0462 | 0.0087 | 0.0624 | 0.1695 | |
| 2 | 0.9686 | 0.3219 | 0.6197 | ||
| 3 | 0.0461 | 0.0086 | 0.0621 | 0.1688 | |
| 4 | 0.037 | ||||
| 5 | 0.0231 | 0.003 | 0.0231 | 0.0666 | |
| 6 | 0.786 | 0.1731 | 0.5943 | 0.4138 | |
| 7 | 0.0463 | 0.0087 | 0.0624 | 0.1696 | |
| 8 | 0.101 | ||||
| 9 | 0.0457 | 0.0083 | 0.0606 | 0.1652 | |
| 10 | 0.037 |
| 神经元 | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
输出 节点1 | 0.1742 | 0.1735 | 0.0675 | |||
输出 节点2 | 0.087 | 0.0866 | 0.035 | |||
| 神经元 | 7 | 8 | 9 | 10 | 偏置 | |
输出 节点1 | 0.1743 | 0.1697 | 0.7766 | |||
输出 节点2 | 0.0871 | 0.0848 | 0.4969 |
表4 隐藏层-输出层神经元权重与偏置
Tab.4 Hidden layer-output layer neuron weights and bias
| 神经元 | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
输出 节点1 | 0.1742 | 0.1735 | 0.0675 | |||
输出 节点2 | 0.087 | 0.0866 | 0.035 | |||
| 神经元 | 7 | 8 | 9 | 10 | 偏置 | |
输出 节点1 | 0.1743 | 0.1697 | 0.7766 | |||
输出 节点2 | 0.0871 | 0.0848 | 0.4969 |
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