用能量最小化方法精准预测张拉整体结构的平衡形态与受力分布。
Energy-Based Physics-Informed Form Finding for Clustered Tensegrity Structures

- 基于总势能最小化构建学习目标,融合物理约束提升预测精度。
- 在不同数据比例下均准确预测出结构平衡节点位置与内部力分布。
- 适合做非线性结构分析与智能设计,尤其适用于张拉整体体系。
张拉整体结构的形态确定与物理特性预测是结构力学中的核心问题,旨在求解平衡构型与内力分布。由于几何与力之间存在强非线性耦合,且需满足平衡、稳定与结构约束,该问题极具挑战。本文提出一种基于能量的学习方法,用于集群式张拉整体结构的形态确定与物理特性预测。该方法将总势能最小化与本构关系引入训练目标,实现对平衡节点构型及成员力、力密度等物理量的重建。通过在学习过程中直接嵌入能量驱动的物理损失,模型在数据驱动与物理一致性间取得平衡。数值实验在棱柱型与着陆器型张拉整体结构上验证了该方法在不同训练数据比例下的高精度表现,展现出在非线性张拉整体形态确定与结构分析中的潜力。
原文摘要 · Abstract (English)
Tensegrity form-finding and physical property prediction are fundamental problems in structural mechanics, which aim to determine equilibrium configurations and internal force distributions. These problems are challenging due to strong nonlinearity arising from the coupling between geometry and forces, and the need to satisfy equilibrium, stability, and structural constraints. This paper proposes an energy-based learning approach for clustered tensegrity form finding and physical property prediction. The proposed approach incorporates total potential energy minimization and constitutive relations into the training objective, enabling the prediction of equilibrium nodal configurations and the reconstruction of physical quantities such as member forces and force densities. By integrating energy-based physical losses directly into the learning process, the method promotes physical consistency while combining data-driven learning with physics-based constraints. Numerical experiments on tensegrity prism and lander structures demonstrate accurate prediction of equilibrium configurations and internal forces across different training-data ratios, indicating the potential of the proposed approach for nonlinear tensegrity form finding and structural analysis.
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