Development of Generating Technique for Triangular Mesh by using Distinct Element Method

Kim, Nam-Hyeong; Yun, Hyeon-Cheol; Hur, Young-Teck

Journal of Navigation and Port Research 2010;34(5):367-373.
Published online June 30, 2010.

개별요소법을 이용한 삼각망 생성기법 개발

김남형, 윤현철, 허영택

Development of Generating Technique for Triangular Mesh by using Distinct Element Method

Nam-Hyeong Kim, Hyeon-Cheol Yun, Young-Teck Hur

Abstract

When the numerical analysis is carried out, it is necessary to set proper elements as a feature of analysis domains for more accurate simulations. In this study, Distinct Element Method(DEM) is applied, only considering repulsive force and tensile force except for frictional force and resisting force of particle. When the filled particles with initial Quad-tree type is relocated by DEM, a blank space existing among the particles can be minimized because the shape of particle is circular. Finally, it is the effective feature that the centroidal disposion of the particles is similar to an equilateral triangle. Triangular mesh are formed by using the Delaunay triangular technique on these relocated particles, the quality of triangular mesh is more improved by carrying out Laplace interpolations. The compared result of Aspect Ratio before and after the Laplace interpolation is shown that although the quality of triangular mesh made by DEM is good, the later triangular mesh are higher quality than the formers. In this study, although the developed technique takes a longer calculational time than the previous technique to generate triangular mesh, it is considered that the applicable possibility is very high in the generation of finite element mesh about wave analysis and various numerical simulation to need a complex or reappearance of exact topography.

Key Words: 개별요소법(DEM);Delaunay 삼각기법;Laplace보간;형상비(AR); Distinct element method(DEM);Delaunay triangular technique;Laplace interpolation;Aspect ratio(AR)