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Improvement Scheme of Nodal Integration in Meshless Method

무요소법에서 절점 적분의 개선방안

  • Published : 2001.09.01

Abstract

Meshless methods, developed in various ways over the past decade, have been attractive as new computational methods in that they do not need mesh generation in analyzing procedure. But most of these methods were not truly meshless methods because background meshes were required for the spatial integration of a weak form. Accordingly, in this paper, nodal integration for truly meshless methods has been studied, and an improvement scheme is proposed. To improve stabilization and accuracy, which are the weak points in previous nodal integration methods, the integration area is transformed to circle and then numerically integrated. This method does not need any adding term for stabilization in the variational formulation and then simplifies the integration procedure. Numerical test results show that the proposed method is more accurate, stable, and reasonable than the existed nodal integration methods.

Keywords

Reproducing Kernel Particle Method(RKPM);Meshless Method;Nodal Integration;Modified Nodal Integration;Integration Cell;Stability

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