arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1805.00528cs.LGcs.CV
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基于重构神经网络方法的仿真物理场重构

Reconstruction of Simulation-Based Physical Field by Reconstruction Neural Network Method

Hunan University(湖南大学)

Yu Li, Hu Wang, Kangjia Mo, Tao Zeng

摘要:

在过去的十年中,各种建模技术已经发展到减少计算费用和提高建模的准确性。在这项研究中,提出了一个新的建模框架。与其他流行的方法相比,它的一个显著特点是“从基于图像的模型到基于分析的模型(如应力、应变和变形)”。在此框架下,提出了一种用于基于仿真的物理场重建的重建神经网络(ReConNN)模型。ReConNN包含两个子模型:卷积神经网络(CNN)和生成对抗网络(GAN)。利用CNN构造物理场的轮廓图像与目标函数之间的映射关系。随后,利用GAN生成更多与现有轮廓图像相似的图像。最后,应用拉格朗日多项式完成重建。然而,现有的CNN模型通常应用于分类任务,这似乎是难以处理的图像回归任务。同时,现有的GAN架构不足以生成高精度的“伪轮廓图像”。因此,提出了一种基于卷积中卷积(CIC)的ReConNN模型和一种基于Wasserstein生成对抗网络(WGAN-CAE)的卷积自动编码器。为了评估所提出的模型representatives的性能,被认为是一个经典的拓扑优化过程。然后将ReConNN应用于针翅式散热器的传热过程重构。结果表明,所提出的ReConNN模型在结构优化等多学科领域具有很强的物理场重构能力。

英文摘要:

A variety of modeling techniques have been developed in the past decade to reduce the computational expense and improve the accuracy of modeling. In this study, a new framework of modeling is suggested. Compared with other popular methods, a distinctive characteristic is "from image based model to analysis based model (e.g. stress, strain, and deformation)". In such a framework, a reconstruction neural network (ReConNN) model designed for simulation-based physical field's reconstruction is proposed. The ReConNN contains two submodels that are convolutional neural network (CNN) and generative adversarial net-work (GAN). The CNN is employed to construct the mapping between contour images of physical field and objective function. Subsequently, the GAN is utilized to generate more images which are similar to the existing contour images. Finally, Lagrange polynomial is applied to complete the reconstruction. However, the existing CNN models are commonly applied to the classification tasks, which seem to be difficult to handle with regression tasks of images. Meanwhile, the existing GAN architectures are insufficient to generate high-accuracy "pseudo contour images". Therefore, a ReConNN model based on a Convolution in Convolution (CIC) and a Convolutional AutoEncoder based on Wasserstein Generative Adversarial Network (WGAN-CAE) is suggested. To evaluate the performance of the proposed model representatively, a classical topology optimization procedure is considered. Then the ReConNN is utilized to the reconstruction of heat transfer process of a pin fin heat sink. It demonstrates that the proposed ReConNN model is proved to be a potential capability to reconstruct physical field for multidisciplinary, such as structural optimization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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