arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2106.01646math.NAcs.NA
收藏

关于wave equation的强制边界元法

Towards coercive boundary element methods for the wave equation

Olaf Steinbach, Carolina Urzúa-Torres, Marco Zank

摘要:

本文讨论一维波动方程单层边界积分算子的椭圆性。这一结果不仅推广了$L^2$中能量边界积分公式的椭圆性,而且也是波动方程边界积分算子inf-sup稳定性的一个新结果的特例.代替能量公式中的时间导数,我们使用修改后的希尔伯特变换,它允许我们停留在相同阶数的索伯列夫空间中。这导致了标准边界元误差估计的适用性,数值结果证实了这一点。

英文摘要:

In this note, we discuss the ellipticity of the single layer boundary integral operator for the wave equation in one space dimension. This result not only generalizes the well-known ellipticity of the energetic boundary integral formulation in $L^2$, but it also turns out to be a particular case of a recent result on the inf-sup stability of boundary integral operators for the wave equation. Instead of the time derivative in the energetic formulation, we use a modified Hilbert transformation, which allows us to stay in Sobolev spaces of the same order. This results in the applicability of standard boundary element error estimates, which are confirmed by numerical results.

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。

↑