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arXiv 1902.04095math.NAcs.NA
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三维弹性波和热弹性波的边界积分方程方法

Boundary integral equation methods for the elastic and thermoelastic waves in three dimensions

School of Mathematical Sciences, Zhejiang University(浙江大学数学系);School of Mathematical Sciences, University of Electronic Science and Technology of China(电子科技大学数学系);Department of Computing and Mathematical Sciences, California Institute of Technology(加州理工学院计算与数学科学系)

Gang Bao, Liwei Xu, Tao Yin

AI总结:

本文研究了基于一阶Fredholm积分方程的三维弹性波和热弹性波的外部Neumann边界值问题的边界积分方程(BIE)方法,提出了一种新的正则化公式以处理超奇异边界积分算子,通过Galerkin边界元方法验证了正则化公式的准确性。

摘要:

在本文中,我们考虑了基于一阶Fredholm积分方程的三维弹性波和热弹性波的外部Neumann边界值问题的边界积分方程(BIE)方法。本工作的创新之处在于提出了新的正则化公式,用于处理与时间谐波弹性和热弹性波方程相关的超奇异边界积分算子(BIO)。借助新的正则化公式,我们只需在相应的边界积分方程的变分形式中计算最多具有弱奇异性的积分。通过使用Galerkin边界元方法进行的数值示例,验证了正则化公式的准确性。

英文摘要:

In this paper, we consider the boundary integral equation (BIE) method for solving the exterior Neumann boundary value problems of elastic and thermoelastic waves in three dimensions based on the Fredholm integral equations of the first kind. The innovative contribution of this work lies in the proposal of the new regularized formulations for the hyper-singular boundary integral operators (BIO) associated with the time-harmonic elastic and thermoelastic wave equations. With the help of the new regularized formulations, we only need to compute the integrals with weak singularities at most in the corresponding variational forms of the boundary integral equations. The accuracy of the regularized formulations is demonstrated through numerical examples using the Galerkin boundary element method (BEM).

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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