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[38040] Artykuł: Trefftz method for a polynomial-based boundary identification in two-dimensional Laplacian problemsCzasopismo: Journal of Theoretical and Applied Mechanics Tom: 54, Zeszyt: 3, Strony: 935-944ISSN: 1429-2955 Wydawca: POLISH SOC THEORETICAL & APPLIED MECHANICS, FWARSAW UNIV TECHNOLOGY, FACULTY CIVIL ENGINEERING, AL ARMII LUDOWEJ 15, RM 650, WARSZAWA, 00-637, POLAND Opublikowano: Lipiec 2016 Autorzy / Redaktorzy / Twórcy
Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 15 Klasyfikacja Web of Science: Article Pełny tekst DOI Web of Science Słowa kluczowe: odwrotne zagadnienie geometryczne  identyfikacja brzegu  metoda Trefftza  równanie Laplacea  Keywords: inverse geometry problem  boundary identification  Trefftz method  Laplace equation  |
The paper addresses a two-dimensional boundary identification (reconstruction) problem in steady-state heat conduction. Having found the solution to the Laplace equation by superpositioning T-complete functions, the unknown boundary of a plane region is approximated by polynomials of an increasing degree. The provided examples indicate that sufficient accuracy can be obtained with a use of polynomials of a relatively low degree, which allows avoidance of large systems of nonlinear equations. Numerical simulations for assessing the performance of the proposed algorithm show better than 1% accuracy after a few iterations and very low sensitivity to small data errors.