相关实验视频
Updated: Jan 8, 2026

09:17
Surrogate Model Development for Digital Experiments in Welding
Published on: March 28, 2025
1.8K
超塑性成型部件的快速厚度分布预测基于几何适应PSO-BP神经网络替代模型
Muqi Sun1,2, Chengyue Xiong3,4, Yuwei Zhou1,2
1State Key Laboratory of Advanced Forming Technology and Equipment, Academy of Machinery Science & Technology, Beijing, 101400, China.
Scientific reports
|December 23, 2025
概括
一个新的网状神经网络模型快速预测超塑性形成 (SPF) 厚度分布. 这种方法显著提高了准确性,使实时流程优化为增强制造控制.
科学领域:
- 材料科学与工程 材料科学与工程
- 计算力学 计算力学 计算力学
- 人工智能在制造业中的应用
背景情况:
- 准确的厚度分布预测对于超塑性成型 (SPF) 的实时流程优化至关重要.
- 传统的有限元分析 (FEA) 方法缺乏实时控制系统所需的计算效率.
- 现有的模型在复杂几何形状中与精确的边界条件和局部错误作斗争.
研究的目的:
- 开发一个计算效率高的替代模型来预测SPF厚度分布.
- 提高厚度预测的准确性,特别是在具有几何复杂性的区域.
- 在工业SPF应用中实现实时过程监控和控制.
主要方法:
- 实现一个以网状信息为基础的神经网络替代模型.
- 利用粒子群优化回向传播 (PSO-BP) 算法用于模型训练.
- 整合了几何适应功能,以解决圆角区域的局部错误.
主要成果:
- 实现了平均绝对百分比误差从1.3%降低到0.8% (约. 与标准PSO-BP.比较,38.5%的改善).
- 能够快速预测 (在0.5秒内) Ti-6Al-4V 零件的厚度分布,与 FEA 偏差小于 1%.
- 证明了适合实时应用的显著计算加快速度.
结论:
- 拟议的PSO-BP神经网络模型为SPF厚度预测提供了一个高度准确和高效的解决方案.
- 这种进步弥合了模拟和制造之间的差距,促进了闭环过程控制.
- 开发的系统具有在工业SPF过程中进行质量监测和动态参数调整的巨大潜力.
相关概念视频
Plastic Deformations of Members with a Single Plane of Symmetry
317
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
317
Plastic Deformations
374
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
374
Plastic Deformation in Circular Shafts
423
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
423
Unsymmetric Loading of Thin-Walled Members: Problem Solving
464
The shear center of a channel section with uniform thickness, height, and width, is determined by computing the shear force in the member and calculating the moments of inertia of the sections.
To compute the shear forces, find the shear flow at a specific distance from the endpoint using the vertical shear and the moment of inertia values. The total shear force on the flange is calculated by integrating the shear flow from one end of the flange to the other.
Next, calculate the moments of...
To compute the shear forces, find the shear flow at a specific distance from the endpoint using the vertical shear and the moment of inertia values. The total shear force on the flange is calculated by integrating the shear flow from one end of the flange to the other.
Next, calculate the moments of...
464
Unsymmetric Loading of Thin-Walled Members
377
Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
The concept of the shear center is crucial in countering the...
377

