SPH理論に基づく粒子法による構造解析の基礎的検討

抄録

As a meshless numerical analysis, particle methods are considered promising in the filed of fluid dynamics and structural analyses. SPH (Smoothed Particle Hydrodynamics), which has been mainly applied to super fast impact or collision problems, is expected to be a more powerful tool for general structural problems such as large deformation and general 3-dim structural problems of complex geometrical objects. However, the fundamental characteristics (accuracy and convergence of solution, effects of time increment and artificial viscosity, etc) of particle methods have not been clarified at all, which causes the fatal limitation of this method. This paper discussed the several numerical properties of SPH by comparing FEM results. It is shown that structural analysis by particle method (SPH) has relatively good accuracy, as well as good numerical convergence and stability in comparison with traditional method (finite element method) and is expected to be a sophisticated tool for a meshless structural analysis.