A robust mapping spectral method for elastic equations in curved fan-shaped domains

IF 2.2 2区数学 Q1 MATHEMATICS, APPLIED

Applied Numerical Mathematics Pub Date : 2025-01-16 DOI:10.1016/j.apnum.2025.01.008

Yuling Guo , Zhongqing Wang , Chao Zhang

引用次数: 0

Abstract

In this paper, we introduce a robust mapping Legendre spectral-Galerkin method for addressing elastic problems in simply-connected, fan-shaped domains with curved boundaries. By employing a polar coordinate transformation, we map the fan-shaped domain onto a rectangle, which transforms the original elastic equation into a variable coefficient equation. We then develop a Legendre spectral-Galerkin scheme for this variable coefficient equation. Additionally, we demonstrate the optimal convergence of the numerical solution in the

H^{1}

-norm as the Lamé coefficient λ remains bounded. Numerical examples illustrate the high accuracy and robustness of our method, even as λ approaches infinity.

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来源期刊

Applied Numerical Mathematics 数学-应用数学

CiteScore

5.60

自引率

7.10%

发文量

225

审稿时长

7.2 months

期刊介绍： The purpose of the journal is to provide a forum for the publication of high quality research and tutorial papers in computational mathematics. In addition to the traditional issues and problems in numerical analysis, the journal also publishes papers describing relevant applications in such fields as physics, fluid dynamics, engineering and other branches of applied science with a computational mathematics component. The journal strives to be flexible in the type of papers it publishes and their format. Equally desirable are: (i) Full papers, which should be complete and relatively self-contained original contributions with an introduction that can be understood by the broad computational mathematics community. Both rigorous and heuristic styles are acceptable. Of particular interest are papers about new areas of research, in which other than strictly mathematical arguments may be important in establishing a basis for further developments. (ii) Tutorial review papers, covering some of the important issues in Numerical Mathematics, Scientific Computing and their Applications. The journal will occasionally publish contributions which are larger than the usual format for regular papers. (iii) Short notes, which present specific new results and techniques in a brief communication.