arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1807.01142math.NAcs.NA
收藏

基于边积分方法的线性和非线性瞬态波散射研究

A boundary integral approach to linear and nonlinear transient wave scattering

UIT the Arctic University of Norway(挪威北极大学)

Aihua Lin, Anastasiia Kuzmina, Per Kristen Jakobsen

AI总结:

本文提出一种结合域方法和边积分方法的新方法,用于求解线性和非线性波方程的散射问题,通过域方法处理波场内部响应,边积分方法提供边界条件以限制计算范围。

摘要:

本文介绍了一种用于求解线性和非线性波方程散射问题的新方法。该方法通过将控制方程重新表述为可以由域方法和边积分方法结合求解的形式。我们的重新表述旨在处理多个紧致散射体位于否则均匀无界空间中的情况。域方法用于在时间上向前传播波场的方程,而边积分方法则为域方法提供所需的波场边界值。这样,两种方法的最佳特性得以结合;域方法可以轻松考虑由材料不均匀性和非线性引起的散射体内部响应,而边积分方法提供的边界条件使域方法能够限制在每个散射体内部。

英文摘要:

In this paper we introduce a method for solving linear and nonlinear scattering problems for wave equations using a new hybrid approach. This new approach consists of a reformulation of the governing equations into a form that can be solved by a combination of a domain-based method and a boundary-integral method.Our reformulation is aimed at a situation where we have a collection of compact scattering objects located in an otherwise homogeneous unbounded space. The domain-based method is used to propagate the equations governing the wave field inside the scattering objects forward in time. The boundary integral method is used to supply the domain-based method with the required boundary values for the wave field. In this way the best features of both methods come into play; the response inside the scattering objects, which can be caused by both material inhomogeneity and nonlinearities, is easily taken into account using the domain-based method, and the boundary conditions supplied by the boundary integral method makes it possible to confine the domain based method to the inside of each scattering object.

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。

↑