论文标题
结构拓扑优化的算法一致的深度学习框架
Algorithmically-Consistent Deep Learning Frameworks for Structural Topology Optimization
论文作者
论文摘要
拓扑优化已成为一种流行的方法,用于完善组件的设计并提高其性能。但是,当前的最新拓扑优化框架是计算密集型的,这主要是由于在优化过程中评估组件的性能所需的多个有限元分析迭代。最近,研究人员探索了基于机器学习(ML)的拓扑优化方法,以减轻此问题。但是,以前的ML方法主要在具有低分辨率几何形状的简单二维应用上证明。此外,当前方法基于用于端到端预测的单个ML模型,该模型需要大型数据集进行培训。这些挑战使得将当前方法扩展到更高的决议是非凡的。在本文中,我们开发了与传统拓扑优化算法相一致的深度学习框架,以提供3D拓扑优化的优化,并具有相当精细的(高)分辨率。我们通过培训多个网络来实现这一目标,每个网络都学习了整体拓扑优化方法的不同步骤,从而使框架与拓扑优化算法更加一致。我们证明了我们的框架在2D和3D几何形状上的应用。结果表明,与当前基于ML的基于ML的拓扑优化方法相比,我们的方法可以更好地预测最终优化设计(2D中总合规性MSE的5.76倍降低5.76倍;总合规性MSE的2.03倍降低)。
Topology optimization has emerged as a popular approach to refine a component's design and increase its performance. However, current state-of-the-art topology optimization frameworks are compute-intensive, mainly due to multiple finite element analysis iterations required to evaluate the component's performance during the optimization process. Recently, machine learning (ML)-based topology optimization methods have been explored by researchers to alleviate this issue. However, previous ML approaches have mainly been demonstrated on simple two-dimensional applications with low-resolution geometry. Further, current methods are based on a single ML model for end-to-end prediction, which requires a large dataset for training. These challenges make it non-trivial to extend current approaches to higher resolutions. In this paper, we develop deep learning-based frameworks consistent with traditional topology optimization algorithms for 3D topology optimization with a reasonably fine (high) resolution. We achieve this by training multiple networks, each learning a different step of the overall topology optimization methodology, making the framework more consistent with the topology optimization algorithm. We demonstrate the application of our framework on both 2D and 3D geometries. The results show that our approach predicts the final optimized design better (5.76x reduction in total compliance MSE in 2D; 2.03x reduction in total compliance MSE in 3D) than current ML-based topology optimization methods.