1992 年 29 巻 2 号 p. 86-94
The inside pressure of a silo, especially the dynamic pressure during discharge is a very important factor in its structural design. However, numerical simulations of this problem have seldom been performed because of its complicated behaviors. In this report, the distinct element method (DEM) which is suitable for discontinuous media is used for analysis of the static state of granular materials in silos, and the possibility of its use to analyze the silo problem is indicated. Also, the characteristic distribution of pressures on walls are studied using the DEM simulation, and the influence of friction coefficients and particle arrangement are examined. The result of this study is that the pressure distributions from the DEM simulation are similar to the theoretical or experimental ones. This result of static analysis is used for the initial condition of dynamic analysis, and it is expected to simulate the complicated behaviors of granular materials during discharge in silos.