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arXiv 2403.04094physics.comp-ph
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基于物理信息神经网络的多重散射模拟

Multiple scattering simulation via physics-informed neural networks

Siddharth Nair, Timothy F. Walsh, Greg Pickrell, Fabio Semperlotti

AI总结:

提出一种物理驱动的PINN框架,通过嵌入控制方程与线性波叠加结构,无需标签数据即可模拟任意形状刚性散射体及高频声学散射。

摘要:

本工作提出了一种用于模拟声学散射问题的物理驱动机器学习框架。所提出的框架基于物理信息神经网络(PINN)架构,该架构利用基于散射问题物理规律的先验知识,以及体现线性波相互作用叠加原理概念的定制网络结构。该框架还能够模拟由任意形状刚性散射体引起的散射场,以及高频问题。与传统的数据驱动神经网络不同,PINN通过直接强制执行描述底层物理规律的控制方程进行训练,因此不依赖任何带标签的训练数据集。值得注意的是,该网络模型的离散化依赖性显著更低,并提供类似于并行计算的模拟能力。这一特性对于应对通常与传统依赖网格的模拟方法相关的计算挑战尤为有益。通过全面的数值研究考察了该网络的性能,该研究探索了基于声学散射的不同应用场景。

英文摘要:

This work presents a physics-driven machine learning framework for the simulation of acoustic scattering problems. The proposed framework relies on a physics-informed neural network (PINN) architecture that leverages prior knowledge based on the physics of the scattering problem as well as a tailored network structure that embodies the concept of the superposition principle of linear wave interaction. The framework can also simulate the scattered field due to rigid scatterers having arbitrary shape as well as high-frequency problems. Unlike conventional data-driven neural networks, the PINN is trained by directly enforcing the governing equations describing the underlying physics, hence without relying on any labeled training dataset. Remarkably, the network model has significantly lower discretization dependence and offers simulation capabilities akin to parallel computation. This feature is particularly beneficial to address computational challenges typically associated with conventional mesh-dependent simulation methods. The performance of the network is investigated via a comprehensive numerical study that explores different application scenarios based on acoustic scattering.

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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